Article
Mechanics
H. Girard, A. Doitrand, B. Koohbor, R. G. Rinaldi, N. Godin, D. Long, J. Bikard, L. Trouillet-Fonti
Summary: Fiber-matrix interface debonding was investigated in single-fiber epoxy-glass fiber specimens subjected to transverse tensile loading. Experimental observations showed sudden debonding initiation between 67 and 83 deg., followed by stable debonding propagation. A coupled criterion (CC) accurately predicted the abrupt debonding initiation, considering stress and energy aspects. This method allowed for obtaining a range of interface shear and opening critical energy release rates (ERR) and strengths. The loading required for initiation depended on the opening (mode I) critical ERR and tensile and shear strengths. The debonding arrest angle also depended on the shear (mode II) critical ERR. Thus, a three-step methodology was described to determine the interface properties and an optimum set of parameters using Linear Elastic Fracture Mechanics.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Materials Science, Composites
Sina AhmadvashAghbash, Christian Breite, Mahoor Mehdikhani, Yentl Swolfs
Summary: Longitudinal fibre-matrix debonding is influenced by various factors such as interfacial strength, fracture toughness, thermal residual stresses, friction, and matrix plasticity. The proposed finite element model accounts for these factors and allows for debond propagation based on assigned interfacial properties. Parametric studies demonstrate that higher values for interfacial friction coefficient, thermal residual stress, and interfacial fracture toughness restrict debond propagation, while matrix plasticity facilitates it.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Mechanics
D. K. Siorikis, C. S. Rekatsinas, N. A. Chrysochoidis, D. A. Saravanos
Summary: This paper presents a novel numerical framework for simulating debonding growth in sandwich structures using a layerwise spectral finite element model. The framework employs a variable kinematic layerwise theory and continuum damage mechanics to track debonding propagation. The developed computational model, named cohesive-layerwise spectral finite element, integrates layerwise mechanics and continuum damage mechanics, resulting in improved computational speed and meshing process.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Medicine, Legal
C. Then, K. Nelson, T. J. Vogl, K. E. Roth
Summary: Nearly six decades after the assassination of President John F. Kennedy, the majority of Americans still doubt the official reports on the direction of the fatal shot. However, a recent investigation using computational simulations suggests that the official reports may be accurate, as the simulation results align with the documented evidence.
FORENSIC SCIENCE INTERNATIONAL
(2022)
Article
Engineering, Geological
Yousef Navidtehrani, Covadonga Betegon, Robert W. Zimmerman, Emilio Martinez-Paneda
Summary: This study uses the Griffith criterion and finite element analysis to evaluate the conditions and validity of the Brazilian test. It finds that the range of conditions where the Brazilian test is valid is narrower than previously assumed, and current practices and standards are inappropriate for many rock-like materials. The study also proposes a test protocol and showcases its validity through case studies and a MATLAB App.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2022)
Article
Materials Science, Ceramics
Shingo Ozaki, Kazuki Yamagata, Chihiro Ito, Takuma Kohata, Toshio Osada
Summary: In this study, a finite element analysis methodology was proposed to predict the stochastic fracture behavior of ceramics based on microstructural features obtained by scanning electron microscopy and X-ray computed tomography. The analysis results confirmed that the proposed method can reasonably predict the strength scatter in ceramics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Composites
Alireza Taherzadeh-Fard, Alejandro Cornejo, Sergio Jimenez, Lucia Gratiela Barbu
Summary: The present study investigates the delamination behavior of laminated composites in different loading modes using a homogenization theory of mixtures. Delamination damage is introduced at the bulk level by eliminating explicit representation of interfaces. Potential delamination planes are identified based on interfacial stresses, and damage evolution is calculated independently for each mode using a stress-based formulation. An arc-length strategy is employed to solve equilibrium equations due to snap-back effects. The reliability of the adopted mixing theory is assessed by comparing results with micromechanical models in fiber metal laminate structures. Good agreement is observed in mode I, mode II, and mixed mode configurations, indicating the effectiveness of the proposed method.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Mechanical
L. M. Martulli, A. Bernasconi
Summary: In this study, a new VCCT-based 3D fatigue propagation algorithm (SSF) is introduced to accurately simulate the fatigue propagation of delamination defects. Compared to the benchmark algorithm, the SSF significantly reduces computational time by three orders of magnitude and achieves better accuracy. This work establishes a more efficient modelling technique for fatigue delamination propagation.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Materials Science, Multidisciplinary
Gianluca Roscioli, Matej Repka, Stella Pedrazzini, Cemal Cem Tasan
Summary: It is found that the direction of crack propagation and failure mechanism in coated carbide-rich martensitic stainless steels changes with increasing corrosion severity.
Article
Engineering, Manufacturing
E. Polyzos, A. Katalagarianakis, D. Van Hemelrijck, L. Pyl
Summary: This article analyzes delamination tests of nylon 3D-printed specimens reinforced with carbon fibers by employing various analytical methods and numerical models. The results are well in agreement with experimental data, supporting the use of stochastic techniques in combination with linear fracture mechanics for the delamination analysis of 3D-printed composites.
ADDITIVE MANUFACTURING
(2021)
Article
Mechanics
Masoud Rezaei, Mohsen A. Issa
Summary: This paper presents a comprehensive experimental investigation of the dynamic size effect and fracture characteristics of concrete, exploring the effect of structural size and aggregate size on the dynamic strength of concrete.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Engineering, Mechanical
Zachary J. Wegert, Vivien J. Challis, Joseph F. Grotowski, Anthony P. Roberts
Summary: We present a computational implementation of mode I finite fracture mechanics (FFM) to investigate the influence of hole shape and size on the strength of linear elastic perforated plates. Our results show that the diamond perforation has the lowest predicted failure stress. By varying material parameters, we explore the competition between energy (toughness) and stress (strength) in the coupled FFM failure criterion. The findings suggest that failure is strength-dominated for small perforation sizes, while toughness dominates at larger sizes for perforation shapes with stress singularities.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Mechanics
Mazharul Islam Lincon, Hui-Yun Hwang
Summary: The adhesion strength of shape-memory fibers (SMFs) embedded in adhesives can be enhanced by adjusting the pre-strain of SMFs and temperature. The degradation of the adhesive's properties and the phase transformation of SMFs are the most influential factors affecting the interfacial shear strength (IFSS).
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Amirreza Sadighi, Ebrahim Maghami, Mohammad Houshmand Khaneghahi, Divya Kamireddi, Seyed Ali Rahmaninezhad, Yaghoob (Amir) Farnam, Christopher M. Sales, Caroline L. Schauer, Ahmad R. Najafi
Summary: This paper conducts a numerical analysis to predict the fracture response of a novel type of fiber reinforced concrete blocks, called multi-functional fiber reinforced concretes (MFRCs). The study analyzes the effects of shell thickness and the ratio of fiber length to diameter on the fracture resistance of the MFRCs. Different loading conditions and material sets are considered, and the values of peak force and absorbed energy are used to compare the performance of each structure. The results show that the most favorable performance and configuration depend on the loading condition and material set, with the lowest fiber length to diameter ratio generally exhibiting the best mechanical response.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Article
Engineering, Biomedical
Jia Qing Isaiah Chua, Dharun Vadugappatty Srinivasan, Sridhar Idapalapati, Ali Miserez
Summary: This study evaluates the fracture response of mantis shrimp dactyl club impact region using microcantilever fracture specimens with chevron-notched crack geometry, finding that crack-tip plastic dissipation is the main mechanism contributing to the fracture properties. The study suggests that the chevron-notched crack geometry is a suitable method to quantitatively assess the fracture toughness of hard biological materials.
ACTA BIOMATERIALIA
(2021)
Article
Engineering, Mechanical
Laurent Mezeix, Simon Dols, Christophe Bouvet, Bruno Castanie, Jean-Paul Giavarini, Natthawat Hongkarnjanakul
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2019)
Article
Mechanics
Juan de Dios Rodriguez-Ramirez, Bruno Castanie, Christophe Bouvet
COMPOSITE STRUCTURES
(2018)
Article
Engineering, Manufacturing
John Susainathan, Florent Eyma, Emmanuel De Luycker, Arthur Cantarel, Bruno Castanie
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2018)
Article
Materials Science, Multidisciplinary
Juan de Dios Rodriguez-Ramirez, Bruno Castanie, Christophe Bouvet
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2020)
Article
Materials Science, Multidisciplinary
John Susainathan, Florent Eyma, Emmanuel D. E. Luycker, Arthur Cantarel, Bruno Castanie
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2020)
Article
Materials Science, Multidisciplinary
Florian Neveu, Bruno Castanie, Philippe Olivier
MATERIALS & DESIGN
(2019)
Article
Materials Science, Composites
Laure Moretti, Bruno Castanie, Gerard Bernhart, Philippe Olivier
JOURNAL OF COMPOSITE MATERIALS
(2020)
Article
Forestry
R. Guelou, F. Eyma, A. Cantarel, S. Rivallant, B. Castanie
Summary: This study presents the results of static and dynamic crushing of wood tubes made of different veneers. The energy absorption characteristics of these materials are comparable to those made of composite materials, making them potential candidates for low carbon and renewable energy absorption.
EUROPEAN JOURNAL OF WOOD AND WOOD PRODUCTS
(2023)
Article
Mechanics
M. Ginot, C. Bouvet, B. Castanie, J. Serra, N. Mahuet
Summary: Structural tests were conducted using the VERTEX methodology to examine the wrinkling behavior of light aircraft sandwich structures. The experiments revealed that wrinkling is caused by mechanical and geometrical factors. These tests contribute to the upper level of the test pyramid for aeronautical certification and provide valuable insights for future investigations on the interaction between experiments and models.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
M. Ginot, C. Bouvet, B. Castanie, M. D'Ottavio, J. Serra, N. Mahuet
Summary: This article presents an experimental-computational dialogue on structural tests on large sandwich panels subjected to compressive and shear loading. The results show a good correlation between the nonlinear finite element model and experimental observations, providing an improved and conservative prediction of wrinkling loads compared to linear models.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Article
Engineering, Civil
P. Journoud, C. Bouvet, B. Castanie, L. Ratsifandrihana
Summary: This study reports the results of a test campaign conducted on curved carbon-epoxy specimens subjected to impact damage combined with manufactured embedded wrinkle defects to investigate their influence on compressive strength. A numerical model was used to simulate wrinkle defects and conduct a numerical study on their impact and compression after impact (CAI) tests. The model yielded satisfactory results for low misalignments but failed for higher levels. Investigations in this work suggest prioritizing impact rather than wrinkle defects in damage tolerance studies.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Manufacturing
Romain Guelou, Florent Eyma, Arthur Cantarel, Samuel Rivallant, Bruno Castanie
Summary: This paper presents the results of static and dynamic crushing of sandwich tubes with carbon or glass skins and different wood cores. It shows that birch layers make a significant contribution to energy absorption, despite being much cheaper than carbon layers. These materials are suitable candidates for low carbon emission and renewable energy absorption.
INTERNATIONAL JOURNAL OF CRASHWORTHINESS
(2023)
Article
Mechanics
Joel Serra, J. E. Pierre, J. C. Passieux, J. N. Perie, Christophe Bouvet, Bruno Castanie
COMPOSITE STRUCTURES
(2017)
Article
Mechanics
M. Fiorin, A. Seman, B. Castanie, K. M. Ali, C. Schwob, L. Mezeix
COMPOSITE STRUCTURES
(2017)
Article
Engineering, Multidisciplinary
Cyril Sola, Bruno Castanie, Laurent Michel, Frederic Lachaud, Arnaud Delabie, Emmanuel Mermoz
COMPOSITES PART B-ENGINEERING
(2017)
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)
