Article
Mechanics
Yaser Heidari, Mohammad Arefi, Mohsen Irani Rahaghi
Summary: This study investigates the free vibration of a functionally graded porous cylindrical small-scale shell using power law distribution. The behavior of the structure is modified by adjusting the quantity and location of strip-like piezoelectric elements. The effects of input parameters are investigated through theoretical and parametric studies.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Engineering, Mechanical
Chaofeng Li, Peiyong Li, Xueyang Miao
Summary: This study proposes a model of laminated cylindrical shells with discontinuous piezoelectric layer and analyzes the nonlinear vibration control of such model with point-supported elastic boundary condition. The introduction of artificial springs to simulate arbitrary boundary conditions, derivation of elastic-electrically coupled differential equations using Chebyshev polynomials and Lagrange equations, and decoupling using negative velocity feedback adjustment are crucial. Additionally, investigating the influence of constant gain, size, and position of the piezoelectric layer on the nonlinear amplitude-frequency response highlights their significant impact on the response.
NONLINEAR DYNAMICS
(2021)
Article
Acoustics
Shupeng Sun, Lun Liu
Summary: The paper investigates multiple internal resonances in the nonlinear vibrations of rotating thin-walled cylindrical shells, considering Coriolis forces and initial hoop tension. A dynamic model is derived using Lagrange equations, and linear vibration characteristics are given. Two types of multiple internal resonances are proposed, one caused by opportune geometric parameters and the other by rotation of the shells. Numerical investigations using harmonic balance method and direct integral approach show detailed nonlinear vibration characteristics with 1:1:1:1 internal resonances.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Engineering, Mechanical
Guohai Chen, Hui Huo, Shuangxi Zhan, Dixiong Yang
Summary: This study proposed an efficient analytical framework to achieve exact stochastic responses of circular cylindrical shells under various stationary excitations and introduced the discrete analytical method. The high accuracy and efficiency of the method were demonstrated through comparisons, and the significant effect of excitation frequency bandwidth on stochastic responses was revealed.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Computer Science, Interdisciplinary Applications
Pham Toan Thang, Dieu T. T. Do, Jaehong Lee, T. Nguyen-Thoi
Summary: This paper presents an in-depth study on the influence of nanoscale parameters on the bending and free vibration responses of functionally graded carbon nanotube-reinforced composite nanoshells. Mathematical formulas and numerical calculations are used to investigate the effect of nanoscale parameters, material properties, and shell shapes on the deflection and fundamental frequency parameters of the nanoshells.
ENGINEERING WITH COMPUTERS
(2023)
Article
Engineering, Multidisciplinary
Jufang Jia, Xinsheng Xu, Yongqi Li, Shengbo Zhu, Yiwen Ni, Andi Lai, Zhenzhen Tong, Zhenhuan Zhou
Summary: An analytical study on the free vibration of stepped-thickness piezoelectric cylindrical shells is conducted using the framework of symplectic mechanics. The study establishes the Hamiltonian governing equations for each segment by considering the step-wise thickness in the axial direction and utilizing Reissner's thin shell theory. The solution procedure involves solving a set of algebraic equations to determine the coefficients of the symplectic series, resulting in natural frequencies and analytical mode shapes.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Engineering, Civil
Yacine Ben-Youssef, Youcef Kerboua, Aouni A. Lakis
Summary: This paper presents a new formulation that combines the nonlinear theory of Novozhilov with the classical finite element method to evaluate the vibratory characteristics of thin cylindrical shells. The theory developed includes the shell curvature effect and initial geometric imperfections on dynamic response. The equations of motion are derived through the Lagrange method and solved using a direct iterative method, with validation of linear and nonlinear frequencies showing excellent agreement with literature results. Investigating the impact of various parameters on nonlinear frequencies is also highlighted in the study.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2021)
Article
Mathematics
Ammar Melaibari, Ahmed Amine Daikh, Muhammad Basha, Ahmed W. Abdalla, Ramzi Othman, Khalid H. Almitani, Mostafa A. Hamed, Alaa Abdelrahman, Mohamed A. Eltaher
Summary: This article presents a mathematical model to analyze the free vibration response of nanoplates and nanoshells. By considering the effects of material distribution, temperature and geometry, and incorporating shear deformation and length scale effects, the vibrational frequencies can be predicted and optimized.
Article
Mechanics
Lu Zhang, Weiping He, Shiyang Zhu, Changliang Lai, Yanming Tao, Hengyi Zhu, Ming Li, Hualin Fan
Summary: This article designs and manufactures a carbon fiber reinforced hierarchical lattice stiffened cylindrical shell (HLSCS). By introducing the effect of neutral plane offsetting, an improved smeared stiffener method is proposed to homogenize the HLSCS. The transverse shear stiffness is predicted using higher-order shear deformation theory, and a nondestructive composite parameter identification method is proposed based on experimental and theoretical results.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Emad Sobhani, Amir R. Masoodi
Summary: This article evaluates the frequency responses of porous nanocomposite Coupled Spheroidal-Cylindrical Shell (CSCS) supplemented by Graphene Nano Platelet (GNP) nano-enrichment. The mechanical features of the porous nanocomposite strengthened by GNP are achieved using Halpin-Tsai and rule of mixture homogenization techniques. Different porosity models are applied to analyze the impact of porosity on the GNP nanocomposite material. The Generalized Differential Quadrature (GDQ) procedure is used to separate the motion equations and extract the frequency responses of the GNP porous nanocomposite CSCS. The effectiveness of the proposed method is validated and the influence of different geometries and material sizes on the frequency responses is evaluated.
COMPOSITE STRUCTURES
(2022)
Article
Computer Science, Interdisciplinary Applications
Pham Van Vinh, Abdelouahed Tounsi, Mohamed-Ouejdi Belarbi
Summary: This paper investigates the free vibration behavior of functionally graded porous doubly curved shallow nanoshells with variable nonlocal parameters. The modified Eringen's nonlocal elasticity theory is applied to capture the small size effect of the naturally discrete FG nanoshells. The governing equations of motion are established using the Hamilton's principle and solved analytically using the Navier's solution. The accuracy of the proposed algorithm is demonstrated through comparisons with existing literature. The effects of geometric parameters, material properties, porosity, and the variation of the nonlocal parameter on the free vibration behavior are analyzed.
ENGINEERING WITH COMPUTERS
(2023)
Article
Engineering, Mechanical
Hui Huo, Zheng Zhou, Guohai Chen, Dixiong Yang
Summary: The study introduces the discrete analytical method (DAM) and obtains exact benchmark responses of thin-walled orthotropic cylindrical shells under stationary and nonstationary random excitations for the first time. The results show that the proposed DAM has high accuracy and efficiency, and the maximum response RMS decreases with increasing acceleration of the moving load under different types of excitations.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Engineering, Civil
Lun Liu, Shupeng Sun, Jiajie Han
Summary: This paper analyzes the nonlinear traveling-wave vibration of a ring-stringer stiffened cylindrical shell by deriving a nonlinear dynamic model using Donnell's nonlinear shell theory and Lagrange equations. The study uses Galerkin's method based on multi-mode approximation, orthogonal circumferential modes, and harmonic balance method to solve the forced vibration responses of the shell. The research also investigates the effects of stiffener parameters on the nonlinear dynamic characteristics of the stiffened shell.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2021)
Article
Engineering, Civil
Pham Van Vinh, Abdelouahed Tounsi
Summary: This paper investigates the free vibration of functionally graded doubly curved nanoshells using nonlocal first order shear deformation theory, and the frequencies are obtained via Navier's solution technique. The effects of various parameters on the vibration response are also studied.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Yacine Ben-Youssef, Youcef Kerboua, Aouni A. Lakis
Summary: This paper presents a numerical model for analyzing the aeroelastic stability of a thin cylindrical shell subjected to external supersonic airflow, taking into account the effect of geometric nonlinearity on the dynamic behavior of the structure. Numerical studies are conducted to validate the accuracy of the model.
THIN-WALLED STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Kemal Arslan, Recep Gunes, M. Kemal Apalak, J. N. Reddy
Summary: The geometrically nonlinear and elastoplastic behavior of a circular FGM plate subjected to mechanical loading-unloading conditions is investigated using a three-dimensional finite element method. The study examines the influences of nonlinearity, load parameter, thickness-to-radius ratio, and material composition on the mechanical behavior of the FGM plate. The results show that a combination of geometrical and material nonlinearities significantly affects the nonlinear mechanical behavior of the FGM plate under plastic deformation.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Pranavi Dhaladhuli, Rajagopal Amirtham, Junuthula N. Reddy
Summary: A thermodynamically consistent phase field formulation is presented for modeling the interactions between interfacial damage and bulk brittle fracture. A novel nonlocal approach is devised to evaluate the smoothened values of jump at the regularized interface, resulting in a more realistic mechanical response of any composite system and accurately representing various failure modes.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Review
Materials Science, Multidisciplinary
C. Gomez, A. Guardia, J. L. Mantari, A. M. Coronado, J. N. Reddy
Summary: The broad application of AI has brought about new approaches in the field of Materials Science and Engineering. Polymer Matrix Composites (PMC), after years of development, have evolved from a futuristic solution to a necessary innovative material.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Mechanics
Matthew A. Fisseler, Arun R. Srinivasa, J. N. Reddy
Summary: This paper presents a method based on principal component analysis and energy minimization to identify local modes of deformation and degrees of freedom in architected structures. The method is able to effectively model complex deformation modes and predict the occurrence of wrinkles in structures.
Review
Materials Science, Multidisciplinary
Ho Yong Shin, Carson Lawrence, Kalyan Raj Kota, Prakash Thamburaja, Arun Srinivasa, Thomas E. Lacy, Junuthula Reddy
Summary: This work provides a comprehensive overview of experimental, theoretical, and numerical methods for understanding and predicting quasi-brittle fracture behavior in plain concrete under quasi-static conditions. The paper aims to guide researchers in selecting appropriate concrete fracture simulating tools, evaluating different experimental set-ups, and discussing the advantages and drawbacks of experimental and numerical tools for studying concrete fracture. Additionally, the review covers crack propagation characteristics in concrete and discusses various damage models and their application in numerical modeling. Future considerations in experimental, theoretical, and numerical studies of concrete fracture are also presented.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Surya Shekar K. Reddy, Rajagopal Amirtham, Junuthula N. Reddy
Summary: The phase field method is used to regularize discrete cracks into diffuse cracks, eliminating the numerical tracking of displacement discontinuities. This method couples the displacement field with the phase field and solves them as sequentially coupled systems using the staggered method. The phase field model can simulate complex crack paths and branching without predefined cracks, making it highly versatile.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Bensingh Dhas, Jamun N. Kumar, Debasish Roy, J. N. Reddy
Summary: This article offers a new perspective on the mechanics of solids using Cartan's moving frames and specifically discusses a mixed variational principle in non-linear elasticity. The quantities defined on the co-tangent bundles of reference and deformed configurations are treated as primary unknowns along with deformation, and their compatibility with the base-space allows for the realization of the configuration as a subset of Euclidean space. The article shows that the use of moving frames and differential forms provides a geometric understanding and enables the rewriting of various quantities and equations. The discretization process using finite element exterior calculus is also explained, and its application to problems in nonlinear elasticity is demonstrated. Overall, the numerical study confirms the effectiveness of this approach without encountering locking or convergence issues.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
N. Jamun Kumar, Bensingh Dhas, Arun R. Srinivasa, J. N. Reddy, Debasish Roy
Summary: This paper proposes a four-field mixed variational principle for large deformation analysis of Kirchhoff rods. By introducing the relationship between points and frames, the curvature and torsion are successfully related to the relative rotation of frames, leading to impressive performance in numerical applications.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Engineering, Biomedical
Zhujiang Wang, Arun R. Srinivasa, Junuthula N. Reddy, Adam Dubrowski
Summary: PIMesh is a point cloud and mesh generation algorithm that can generate optimized high-quality point clouds and unstructured meshes for domains in any shape. It can handle 2D and 3D images and easily control mesh grading. PIMesh is useful for a variety of applications, including meshless methods, finite element methods, computer graphics applications, and surgical simulators.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Bensingh Dhas, Jamun Kumar Nagaraja, Debasish Roy, Junuthula N. Reddy
Summary: In this study, a mixed finite element model is proposed for 3D nonlinear elasticity. The model utilizes a Hu-Washizu type variational principle and distinguishes a vector from a 1-form in the approximation process. The discrete equations are obtained using ideas from finite element exterior calculus and solved using Newton's method. The results demonstrate that the proposed mixed finite element approximation overcomes the numerical bottlenecks encountered by conventional displacement based approximations.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Jiabin Sun, Zhenhuan Zhou, Xueqing Cao, Qifeng Zhang, Wei Sun, Zhenzhen Tong, Xinsheng Xu, C. W. Lim, J. N. Reddy
Summary: This study comprehensively investigates the extremely large post-buckling deformation of perforated cylindrical shells through experiments, analytical shell models, and nonlinear finite element simulations. A waisted post-buckling configuration characterized by uniform shrinking in the middle section of the shell is identified. This behavior is attributed to a pattern transformation under compressive load, displaying hyperelastic metamaterial characteristics. The load-carrying capacity of the waisted post-buckling mode suffers a sudden drop and then recovers when the holes are completely collapsed and closed. The negative Poisson's ratio induced by pattern transformation plays a key role in forming the waisted post-buckling modes. The findings have implications for the construction of functional devices for soft robotics, actuators, and structural protection for facilities, among other applications.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Engineering, Multidisciplinary
R. Alebrahim, P. Thamburaja, A. Srinivasa, J. N. Reddy
Summary: This work proposes a pseudoinverse-based finite-element solver for modeling the deformation and fracture of solids. The pseudoinverse of the stiffness matrix is calculated using a fast QR decomposition-based method. The new finite-element framework allows solving equations even when the stiffness matrix is singular and avoids the introduction of artificial regularization. The proposed method is robust in solving boundary value problems involving elastic deformation and brittle fracture, and it allows modeling the separation and fragmentation of solids during fracture.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
H. Y. Shin, P. Thamburaja, A. R. Srinivasa, J. N. Reddy
Summary: In this study, a novel nonlocal three-dimensional finite element method is developed to simulate fracture in quasi-brittle solids. The nonlocal aspects of the model are validated through the fabrication of a particulate composite with specific dimensions and mass fractions. The model is implemented in a parallel computing environment and shows improved computational performance for impact and quasi-static loading conditions. The model is capable of simulating fracture in such materials and successfully simulates the impact response and crack closure behavior of concrete.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
D. Pranavi, A. Rajagopal, J. N. Reddy
Summary: The use of Erigen's nonlocal theory for the analysis of functionally graded beams, plates, and shells is discussed in this note. The properties of the nonlocal modulus and its dependency on the internal length scale are highlighted. The use of Erigen's nonlocal model with different nonlocal approaches is discussed with evidence from the literature.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Mathematics, Interdisciplinary Applications
Mustafa Kemal Apalak, Junuthula N. Reddy
Summary: This study investigates the strain and stress states in an aluminum single lap joint bonded with a functionally graded Al2O3 micro particle reinforced adhesive layer subjected to a uniform temperature field. Navier equations of elasticity theory were designated by considering the spatial derivatives of Lame constants and the coefficient of thermal expansion for local material composition. The set of partial differential equations and mechanical boundary conditions for a two-dimensional model was reduced to a set of linear equations by means of the central finite difference approximation at each grid point of a discretized joint. The through-thickness Al2O3-adhesive composition was tailored by the functional grading concept, and the mechanical and thermal properties of local adhesive composition were predicted by Mori-Tanaka's homogenization approach.
MATHEMATICAL AND COMPUTATIONAL APPLICATIONS
(2023)
Article
Mechanics
Rawan Aqel, Patrick Severson, Rani Elhajjar
Summary: A novel core splice joint configuration for composite sandwich structures is studied and proposed to improve the strength and toughness. Experimental and numerical efforts show that this configuration can significantly increase the ultimate strength by 13% to 51% and the toughness by 2% to 35%.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xianheng Wang, Cong Chen, Jinsong Zhang, Xinming Qiu
Summary: In this paper, a new form-finding method based on spatial elastica model (FMSE) is proposed for elastic gridshells. The method integrates the deformations of elastic rods into the overall deformation of the gridshell, and solves a set of transcendental equations using the quasi-Newton method to ensure the deformation satisfies the given boundary conditions. The method is validated through experiments and expected to have potential applications in the investigations of elastic gridshells.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Hao Huang, Zitong Guo, Zhongde Shan, Zheng Sun, Jianhua Liu, Dong Wang, Wang Wang, Jiale Liu, Chenchen Tan
Summary: The conventional evaluation of 3D braided composites' mechanical properties through numerical and experimental methodologies hinders material application due to the expenses, time constraints, and laborious efforts involved. This study establishes a multi-scale finite element model and a surrogate model for predicting the elastic properties of 3D4D rotary braided composites with voids. By optimizing a neural network model, the results are validated and provide valuable insights into the microstructure and properties of these composites.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xinyu Li, Hao Zhang, Haiyang Yang, Junrong Luo, Zhongmin Xiao, Hongshuai Lei
Summary: Due to their excellent mechanical properties and design flexibility, fluted-core composite sandwich structures have gained significant attention in aerospace and rail transit applications. This study investigated the free-vibration characteristics and optimized design of composite fluted-core sandwich cylinders through theoretical models and experimental tests.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Chao Li, Chunzheng Duan, Xiaodong Tian, Chao Wang
Summary: A mechanistic model considering the bottom edge cutting effect and the anisotropic characteristics of the material is proposed in this paper to accurately predict cutting forces. The model was validated through a series of milling experiments and can be used to predict the cutting force of various parts of the cutter and any feed direction.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Camila Sanches Schimidt, Leopoldo Pisanelli Rodrigues de Oliveira, Carlos De Marqui Jr
Summary: This work investigates the vibro-acoustic performance of graded piezoelectric metamaterial plates. The study shows that piezoelectric metamaterial plates with reconfigurable properties can provide enhanced vibration and sound power attenuation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jun Ke, Li-jie Liu, Zhen-yu Wu, Zhong-ping Le, Luo Bao, Dong-wei Luo
Summary: Compared with other green natural fibers, ramie has higher mechanical properties and lower cost. In this study, ramie and glass fiber are made into composite circular tubes. The results show that the hybrid circular tube with ramie and glass fiber has improved torsional mechanical properties and reduced weight and cost. The failure mechanisms are affected by the loading direction and the content of each fiber.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Natalia Pingaro, Gabriele Milani
Summary: This paper proposes an enhanced analytical model for predicting the behavior of FRCM samples tested under standard tensile tests. The model takes into account the interaction between fibers and matrix through the interface, and assumes different material properties at different phases. By solving a second order linear differential equation, an analytical solution can be obtained. The model is validated with experimental data and shows good predictability.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jialiang Fan, Anastasios P. Vassilopoulos, Veronique Michaud
Summary: This article investigates the effects of voids, joint geometry, and test conditions on the fracture performance of thick adhesive Double Cantilever Beam (DCB) joints. It concludes that grooved DCB joints with low void content tested at low displacement rates showed stable crack propagation without significant crack path deviation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Auwalu I. Mohammed, Kaarthikeyan Raghupathy, Osvaldo De Victoria Garcia Baltazar, Lawson Onokpasah, Roger Carvalho, Anders Mogensen, Farzaneh Hassani, James Njuguna
Summary: This study investigates the performance of composite pressure vessels under damaged and undamaged conditions, providing insights into their reliability and residual strength capabilities. The results demonstrate that the damage profile and its effect on compressive strength are similar between damaged and non-damaged cylinders. When subjected to quasi-static compression, the polyethylene liner absorbs enough elastic strain energy to recover without plastic deformation. Additionally, quasi-static compression has little to no influence on the axial strength of the cylinders. The damage characterization reveals fiber breakage, delamination, local buckling, and brooming failure. This study has direct implications for the safety design tolerances, manufacturing strategies, and operational failure conditions of composite overwrapped pressure vessels (COPVs).
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Muhammad Irfan Shirazi, Samir Khatir, Djilali Boutchicha, Magd Abdel Wahab
Summary: Structural health monitoring is important to ensure the safety of components and structures. This study proposes a method using finite element models and 1D-CNN network to extract and classify vibration responses for crack detection. The results show that the proposed approach is effective in real-time damage detection.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Maryam Mirsalehi, Kiarash Kianpour, Sharif Shahbeyk, Mohammad Bakhshi
Summary: This study comprehensively investigates the one-way response of 3D-woven sandwich panels (3DWSPs) and their interfering parameters, providing interpretation of elastic and failure results, failure maps, and reliable theoretical models for linear elastic response and observed failure mechanisms.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Yiming Zhao, Zhonggang Wang, Zhigang Yang, Bin Qin
Summary: The paper proposes a Ritz and statistical energy analysis (Ritz SEA) hybrid method for calculating rectangular plate acoustic vibration coupling in the mid-frequency range. This method combines the fast convergence and ability to handle arbitrary boundary conditions of the Ritz method with the power flow equation of the statistical energy analysis method. The results show that this approach effectively filters out random fluctuations in mid-frequency domains while demonstrating exceptional stability and precision.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Joao Henrique Fonseca, Woojung Jang, Dosuck Han, Naksoo Kim, Hyungyil Lee
Summary: This study addresses the enhancement of an injection-molded fiber-reinforced plastic / metal hybrid automotive structure and its plastic injection molding process through the integration of the finite element method, artificial intelligence, and evolutionary search methods. Experimental validation of finite element models, the generation of a database through orthogonal array and Latin hypercube methods, and the training of artificial neural networks are conducted. The genetic optimization algorithm is then applied to identify optimal process parameters. The results show significant reduction in product warpage and manufacturing time while maintaining structural strength, contributing to the advancement of composite automotive structures with superior quality.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Alessandro Vescovini, Carina Xiaochen Li, Javier Paz Mendez, Bo Cheng Jin, Andrea Manes, Chiara Bisagni
Summary: This paper presents a study on six single-stringer specimens manufactured using the card-sliding technique with non-crimp fabrics and adopting a Double-Double (DD) stacking sequence. The specimens were tested under compression loading conditions to investigate post-buckling and failure in aerospace structures. Experimental results and numerical simulations were compared to analyze the behavior and failure modes of the specimens. The study found promising evidence of a viable solution to optimize aeronautical structures and enhance resistance to skin-stringer separation, particularly with the use of tapered flanges.
COMPOSITE STRUCTURES
(2024)
