Article
Mechanics
Zelin Yan, Feng Dai, Yi Liu, Mingdong Wei, Wei You
Summary: This study investigates the progressive failure process of flattened Brazilian disc (FBD) specimen using digital image correlation technique and proposes a modified calculation method to determine mode-I fracture toughness KIC. Additionally, the cracking nature of secondary cracks and the second rise of loading force induced by compressionshear failure near the flattened ends of the FBD specimen are identified. These findings contribute to a better understanding of the progressive fracture mechanism of FBD specimens and enhance the accuracy of KIC calibration by FBD testing method.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Engineering, Multidisciplinary
A. S. Fayed, A. S. Sherbini, H. S. S. Abou El-Mal
Summary: In this study, mechanical and fracture properties of different types of fiber reinforced concrete were evaluated using experimental and numerical models. The results indicate that the generalized maximum tangential stress provides a more accurate prediction of fracture and crack initiation angle in fiber reinforced concrete.
AIN SHAMS ENGINEERING JOURNAL
(2023)
Article
Mechanics
Wei Liu, Yulong Li, Zhiqian Zhang, Liyun Yang, Yi Luo, Zhongwen Yue
Summary: This study investigates the mixed-mode I+II fracture characteristics of V-notched rock specimens under impact loads, considering the effects of loading rate, notch angle, and loading angle. Experimental and numerical analysis results show that loading rate has a significant positive effect on the fracture toughness value, but has a negative effect on the crack initiation angle.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Shiv Sahaya Shukla, K. S. R. K. Murthy, S. Sajith
Summary: In this work, mixed mode (I/III) fracture behavior was investigated using a new specimen and an out-of-plane loading fixture compatible with conventional uniaxial universal testing machines. The proposed specimen, a single edge cracked circular (SECC) specimen, can be used for metallic and non-metallic materials under static and fatigue loads. Finite element analyses and experimental fracture studies were conducted, showing good agreement with existing mixed mode (I/III) fracture criteria. The results indicate that the pure mode III fracture toughness is 1.46 times greater than that of mode I, attributed to an increase in the inelastic region around the crack tip. Fractured surface analysis revealed rougher surfaces with increasing mode III component. Preliminary fatigue crack growth studies on Al 7075-T6 using the SECC specimen were also presented, confirming the applicability of the proposed setup for studying mixed mode fracture behavior under static and fatigue loading.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Energy & Fuels
Peiwang Cao, Tao Zhou, Yang Ju, Jianbo Zhu
Summary: It is still unclear how different loading angles (beta) affect the mixed mode I/II fracture behavior of rock. To investigate this, cracked straight through Brazilian disc tests were performed on sandstone under various beta. The results show that the effect of beta on peak load and crack propagation velocity is slight, but there is a linear increase in mixed mode I/II fracture toughness with increasing beta.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2023)
Article
Engineering, Mechanical
Quanqi Zhu, Diyuan Li, Xibing Li, Zhenyu Han, Jinyin Ma
Summary: The cracked straight through Brazilian disc (CSTBD) specimen was used to investigate the I/II mixed mode static fracture of diorite in this study. The results showed that the fracture mechanical behavior and trajectories were influenced by the crack angle. Fracture energy and crack mouth opening displacement (CMOD) were characterized, and a fracture energy calculation method considering primary crack growth was proposed. The proposed EEMTSN criterion had the best prediction effect on the mixed mode fracture toughness of diorite.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Xinting Miao, Haisheng Hong, Jian Peng, Tao Ping, Fengfeng Bie, Chenyang Jiang
Summary: The mixed mode fracture behaviors of TC4 titanium alloy were systematically studied by finite element method, testing, and theoretical analysis. It was found that there is II-III coupling effect ahead of the crack tip for mixed mode crack, and three-dimensional stress intensity factors were defined and calculated based on this. Under I-II mixed mode loading, the crack exhibited a planar propagation state, and the deflection angle increased with the mode II component. The I-II mixed mode fracture of TC4 showed a brittle fracture mechanism, and the brittle fracture criteria were in agreement with test results with some conservatism. However, under I-III mixed mode loading, the crack exhibited a spatial propagation state, and the deflection angle firstly increased then decreased with the mode III component. This is because the fracture mechanism shifted from brittle to brittle-ductile mixed fracture mode as the mode III component increased. The brittle criterion had a good prediction on I-III mixed mode brittle fracture behavior, with a low enough mode III component. The conclusions in this paper are of great significance to the mixed mode fracture evaluation of TC4 titanium alloys.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Jian Liu, Lan Qiao, Yuan Li, Qingwen Li, Dongjue Fan
Summary: This study investigates the effect of quasi-static loading rate on the mixed-mode I/II fractures of rock materials. The results show that fracture toughness increases with increasing quasi-static loading rate, while crack initiation angle and fracture geometry remain relatively stable. A generalized maximum tangential strain energy density (GMTSED) criterion is proposed to analyze the development of fracture toughness and crack initiation angle. The experimental and analytical results support the validity of the GMTSED criterion.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Mechanics
Shiv Sahaya Shukla, S. Sajith, K. S. R. K. Murthy
Summary: A simple and efficient specimen geometry for mixed mode (I/II) fracture tests and fatigue crack growth studies has been proposed in this investigation. Through extensive finite element analyses and experimental studies, the proposed specimen geometry shows good agreement with widely used fracture criteria in terms of fracture toughness, indicating its practicality.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Engineering, Mechanical
Yifan Li, Martyn J. Pavier, Harry Coules
Summary: The Holed-Cracked Square Plate (HCSP) configuration allows for investigation of I/II mixed-mode fracture in brittle and quasi-brittle materials. Using finite element method, stress intensity factors and T-stress solutions were calculated for various crack lengths and hole diameters. The experimental results on PMMA demonstrated consistent fracture toughness values and agreement with mixed-mode fracture theories.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2021)
Article
Engineering, Mechanical
Yaoyao Meng, Hongwen Jing, Zefu Zhou, Liang Zhang, Shenghao Sun
Summary: The experimental results demonstrated that both the bedding plane angle and notch angle significantly influenced the fracture behavior of rock-like material. Different combinations of angles resulted in variations in fracture load, fracture modes, and fracture surface properties.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Engineering, Mechanical
Li-Zhu Jin, Chang-Yu Zhou, Chen-Yang Yu, Qi Pei, Le Chang, Xiao-Hua He
Summary: Through theoretical analysis and experimental study, crack initiation characteristics of HT200 and PMMA under compression were investigated, demonstrating that considering T-stress components in the modified fracture criterion is more consistent with experiments and crack initiation angle is related to material properties.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Mechanics
Zelin Yan, Feng Dai, Linjuan Wang, Jidong Jin, Jianxiang Wang
Summary: In this study, a novel double-edge notched flattened Brazilian disc (DNFBD) specimen is introduced for dynamic mode II fracture toughness tests of rocks. Experimental results show that the dynamic mode II fracture toughness generally increases with increasing loading rate, and is always higher than the mode I fracture toughness. The microscopic fracture mechanism of sandstone is found to vary with loading rate.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Chen Zhou, Jian He
Summary: This study investigates the safety hazard caused by mixed mode fracture in composite materials. Analytical expressions for the energy release rate (ERR) and mode mixity phase angle are derived for an asymmetric single-leg sandwich bending (SLSB) fracture specimen. The modified crack surface displacement extrapolation (MCSDE) method is proposed to obtain the numerical solution of ERR and mode mixity. The effects of loading characteristics, core and face sheet geometric parameters, and material parameters on ERR and mode mixity are investigated. A reinforced single-leg sandwich bending specimen (RSLSB) is proposed to solve the problem of excessive deformation, and its analytical solution is derived. The existence of the reinforced layer increases the mode I fracture component.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Jichen Zhong, Jiao Wang, Xiangyu Li, Xihua Chu
Summary: The effects of crack configuration on crack initiation angle were investigated through experiments and numerical simulations, yielding a prediction formula for the crack initiation angle.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Mechanics
B. Ameri, F. Taheri-Behrooz, M. R. M. Aliha
Summary: This study investigates the cracking behavior of ABS parts manufactured through FDM. Semi-Circular Bending fracture samples are used for inspection. The results show that the fracture behavior of ABS samples is brittle, similar to homogenous materials. The crack paths under dynamic and static loading conditions are nearly identical.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Mechanics
M. R. M. Aliha, Hamid reza Karimi, S. M. N. Ghoreishi
Summary: A new test configuration ASBB was proposed for investigating mixed mode I/II fracture, achieving complete mode mixities. Experimental and numerical methods were used to determine the effects of different crack lengths and bottom rollers distances on fracture parameters, and the practical ability of the ASBB specimen was validated through PMMA tests.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Seyed Karen Alavi, Majid R. Ayatollahi, Bahador Bahrami, Morteza Nejati
Summary: This study presents an analytical stress solution for bi-material V-notches with an end hole. The stress field is derived as an asymptotic series solution using the Kolosov-Muskhelishvili approach, with the constant coefficients computed using the least square method. The accuracy of the solution is verified through benchmarking with finite element method results.
MATHEMATICS AND MECHANICS OF SOLIDS
(2023)
Article
Engineering, Mechanical
A. R. Torabi, Sahel Shahbaz, S. Cicero, M. R. Ayatollahi
Summary: This study aims to provide new experimental data on the fracture behavior of biopolymer specimens containing notches and validate new fracture criteria to predict the corresponding experimental fracture loads. The Equivalent Material Concept combined with the MTS and MS criteria offers accurate predictions for fracture load predictions of the U-notched biopolymer specimens being tested, with the EMC-MTS criterion being preferred for its simplicity.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Engineering, Mechanical
A. Nabavi-Kivi, Majid R. Ayatollahi, Parham Rezaeian, Nima Razavi
Summary: This research investigates the mixed-mode fracture behavior of FDM Acrylonitrile Butadiene Styrene (ABS) specimens, with a focus on the effects of printing speed and mode mixity on fracture resistance. Fracture loads were predicted using the Equivalent Material Concept (EMC) method and J-integral approach, and the failure mechanisms were studied using Scanning Electron Microscopy (SEM).
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
S. M. Javad Razavi, Amir Nabavi-Kivi, Majid R. Ayatollahi
Summary: Fused deposition modeling is an additive manufacturing technique used for rapid manufacturing and prototyping. However, the layer-wise fabrication process often leads to anisotropic behavior in the final products. This research aims to determine whether the isotropic assumption of material using maximum tangential stress and mean stress criteria can predict the mixed-mode fracture resistance of 3D-printed parts. The results show that both criteria can accurately predict the fracture loads of the fused deposition modeling parts.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS
(2023)
Article
Engineering, Mechanical
Majid R. R. Ayatollahi, Parham Rezaeian, Amir Nabavi-Kivi, Mohammad Reza Khosravani
Summary: This study investigates the effect of heat treatment on the tensile, flexural, and fracture strength of PLA specimens made by the FDM technique. Annealing at different temperatures (80℃, 100℃, 120℃) was conducted on dog bone and ECT specimens to evaluate the mechanical and fracture performance of the FDM-PLA parts. Fracture behavior was assessed using EMC, J-integral, ASED, and MTS criteria, and compared with experimental results. Heat treatment significantly improved the structural integrity of FDM specimens, with a 57% increase in fracture resistance.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Chemistry, Physical
Alireza Akhavan-Safar, Ghasem Eisaabadi Bozchaloei, Shahin Jalali, Reza Beygi, Majid R. Ayatollahi, Lucas F. M. da Silva
Summary: Repeated impact is a common loading condition for bonded joints. However, the behavior of metal-composite bonded joints under repeated impact loads has not been widely studied. This study proposes the use of bi-adhesive technique to improve the durability of composite-metal joints under impact fatigue. Experimental and numerical analyses reveal that the double adhesives technique significantly enhances the impact fatigue life of the joints.
Article
Mechanics
A. Nabavi-Kivi, Majid R. Ayatollahi, Nima Razavi
Summary: This study investigates the fracture behavior of FDM specimens made of ABS under mixed-mode I/III loading conditions. Four different raster configurations and five loading angles were used, and the failure loads were predicted using the Equivalent Material Concept coupled with J-integral and Maximum Tangential Stress criteria. Both criteria were able to accurately predict the experimental failure loads, and SEM analysis confirmed the presence of three failure features.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Article
Engineering, Mechanical
Reza Jalayer, Behnam Saboori, Majid Reza Ayatollahi
Summary: A new test specimen is proposed for investigating mixed mode I/II/III fracture of materials. This test specimen creates mixed mode I/III loading conditions by displacing the position of an inclined crack from the middle of the rectangular specimen, in addition to mode II loading under anti-symmetric four-point bending. The experimental fracture loads of PMMA specimens are compared with theoretical predictions, showing satisfactory consistency.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Engineering, Mechanical
Bahador Bahrami, Hossein Talebi, Majid R. Ayatollahi, Mohammad Reza Khosravani
Summary: This research demonstrates the application of artificial neural network (ANN) in predicting fracture under mixed-mode I/II loadings. By analyzing the importance of different input factors, crack parameters and material properties are selected as input data. Multiple ANN models are trained and optimized using different algorithms. The optimized models show low errors and high accuracy in predicting fracture, indicating the effectiveness and potential wide range application of data-driven fracture predictions compared to traditional physics-based criteria.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Composites
Mostafa Moazzami, M. R. Ayatollahi, Alireza Akhavan-Safar, Sofia Teixeira de Freitas, Lucas F. M. da Silva
Summary: Moisture diffusion occurs in composite laminates when exposed to humidity, leading to a reduction in their mechanical properties, especially flexural stiffness, which is important in design. This research investigates the mechanical properties of CFRP and GFRP composites as a substrate in adhesive joints under cyclic wet/dry aging conditions for long-term structural applications. The results show that the reduction in flexural stiffness is more severe in CFRP laminates compared to GFRP laminates, indicating the suitability of GFRP laminates for ocean applications.
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Engineering, Civil
S. Karen Alavi, Majid R. Ayatollahi, Mohd Yazid Yahya, S. S. R. Koloor
Summary: This work presents an analytical investigation of the damped forced vibration behavior of viscoelastic annular sector plates made of porous polymer foam. The motion equations are derived using the first-order shear deformation theory (FSDT) in conjunction with the energy method and calculus of variations. Three types of pore distribution in the plate thickness are explored, and the obtained relations are extended to constitutive equations using the standard linear solid (SLS) viscoelastic model. The system of equations with variable coefficients is solved using perturbation technique and Fourier series, and the asymmetrically dynamic response is computed analytically in a closed-form solution. Transient dynamic behavior of viscoelastic functionally graded porous (VFGP) annular sector plates is then analyzed for various loadings, and a user-defined field code is developed for reliability evaluation.
THIN-WALLED STRUCTURES
(2023)
Article
Polymer Science
Hossein Talebi, Mohsen Askari, Majid Reza Ayatollahi, Sergio Cicero
Summary: The research investigates the fracture behavior of brittle specimens weakened by V-shaped notches with end holes (VO-notches). Experimental investigation is conducted, and it is found that the size of the notch end-hole has an effect on the fracture resistance. Two stress-based criteria, the maximum tangential stress (MTS) criterion and the mean stress (MS) criterion, are developed for VO-shaped notches under mixed-mode I/III loading, and they accurately predict the fracture resistance of VO-notched samples with about 92% and 90% accuracy, respectively.
Article
Engineering, Chemical
A. Akhavan-Safar, Sh. Jalali, L. F. M. da Silva, M. R. Ayatollahi
Summary: Cyclic loading significantly affects the durability of adhesively bonded joints, especially under cyclic impact loads. Low-energy cyclic impacts decrease the fracture energy of the joints, challenging the assumption of infinite life under cyclic impacts. The stress concentration caused by cyclic impact stress waves leads to a higher density of cracks at the specimen edges. Comprehensive inspections for bonded structures exposed to low-energy cyclic impacts are important to maintain joint strength and safe design and inspection practices.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2023)
Article
Mechanics
Zhiqiang Meng, Xu Gao, Hujie Yan, Mingchao Liu, Huijie Cao, Tie Mei, Chang Qing Chen
Summary: This paper presents a cage-shaped, self-folding mechanical metamaterial that exhibits multiple deformation modes and has tunable mechanical properties, providing multifunctional applications in various fields.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Hasan Murat Oztemiz, Semsettin Temiz
Summary: Sandwich panel composites have various applications and their mechanical behavior and performance depend on material properties and geometry. The load-carrying capacity of S-core composite sandwich panels increases with the increase of the core wall thickness, but decreases with the increase of the core height.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Yang Sun, Wei Zhang, Weipeng Hu, Mabao Liu
Summary: The study presents a novel computational framework to investigate the effect of graphene percolation network on the strength-ductility of graphene/metal composites. It utilizes the Cauchy's probabilistic model, the field fluctuation method, and the irreversible thermodynamics principle.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Elaheh Kazemi-Khasragh, Juan P. Fernandez Blazquez, David Garoz Gomez, Carlos Gonzalez, Maciej Haranczyk
Summary: This study explores group interaction modelling (GIM) and machine learning (ML) approaches for predicting thermal and mechanical properties of polymers. ML approach offers more reliable predictions compared to GIM, which is highly dependent on the accuracy of input parameters.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Yafei Yin, Shaotong Dong, Dong Wu, Min Li, Yuhang Li
Summary: This paper investigates a bending-induced instability in sandwiched composite structures, and establishes a phase diagram to predict its characteristics. The results are of great significance in understanding the physical mechanisms of bending instability and providing design guidelines for practical applications.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Dhairya R. Vyas, Sharen J. Cummins, Gary W. Delaney, Murray Rudman, Devang V. Khakhar
Summary: In this study, multiple collisions of granules on a substrate are analyzed using Collisional Smooth Particle Hydrodynamics (CSPH) to understand the influence of impact-induced deformation on subsequent collision dynamics. It is found that the collision dynamics are dependent on the impact location and the deformation caused by preceding impacts. The accuracy of three theoretical models is also evaluated by comparing their predictions with CSPH results, and it is discovered that these models are only useful for predicting collisions at the same location repeatedly.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Sneha B. Cheryala, Chandra S. Yerramalli
Summary: The effect of hybridization on the growth of interface crack along the fiber is predicted. The study shows an enhancement in the compressive splitting strength with hybridization due to the lateral confinement effect on the interfacial crack.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Xiang-Nan Li, Xiao-Bao Zuo, Liang Li, Jing-Han Liu
Summary: A multiscale mechanical model is proposed to quantitatively describe the macro-mechanical behavior of fiber reinforced concrete (FRC) based on its multiscale material compositions. The model establishes the stiffness and strength equations for each scale of FRC and demonstrates the influence of steel fiber parameters on the mechanical properties of FRC.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Vicente Ramirez-Luis, Hilario Hernandez-Moreno, Orlando Susarrey-Huerta
Summary: In this paper, a Multicell Thin-walled Method is developed for studying the stress distributions in multimaterial beams. This method accurately obtains complex stress fields while reducing the solution time and computational cost. Validation with the finite element method confirms the accuracy of the proposed method.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Yanfeng Zheng, Siyuan Li, Jingyao Zhang, Yaozhi Luo
Summary: This study proposes an enhanced simplified model based on finite particle method (FPM) to consider the link cross-sectional size and contact in Bennett linkages. The model introduces virtual beams and contact forces to accurately simulate the real-world behavior of Bennett linkages. The proposed method is effective for dynamic analysis of large-scale deployable Bennett linkages and shows great potential.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Viktoriya Pasternak, Heorhiy Sulym, Iaroslav M. Pasternak
Summary: This paper investigates anisotropic elastic, magnetoelectroelastic, and quasicrystal solids and presents their equations of time-harmonic motion and constitutive relations in a compact and unified form. A matrix approach is proposed to derive the 3D time-harmonic Green's functions for these materials. The effects of phason field dynamics on the phonon oscillations in quasicrystals are studied in detail. The paper provides a strict proof that the eigenvalues of the time-harmonic magnetoelectroelaticity problem are all positive. It also demonstrates the application of the obtained time-harmonic Green's functions in solving boundary value problems for these materials using the derived boundary integral equations.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Jan Tomec, Gordan Jelenic
Summary: This paper investigates the relationship between different formulations and contact-force models in beam-to-beam contact mechanics. It specifically addresses the recently developed mortar method and develops its variant based on the penalty method. The developed elements are tested using the same examples to provide an objective comparison in terms of robustness and computational cost.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Paulo Teixeira Goncalves, Albertino Arteiro, Nuno Rocha, Fermin Otero
Summary: This work presents a novel formulation of a 3D smeared crack model for unidirectional fiber-reinforced polymer composites based on a stress invariant approach for transverse yielding and failure initiation. The performance of the model is evaluated using monotonic and non-monotonic damage evolution, verified with single element tests and compared with experimental results.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Hanbin Yin, Yinji Ma, Xue Feng
Summary: This paper investigates the peeling behavior of a viscoelastic film bonded to a rigid substrate and establishes a theoretical peeling model. The study reveals three typical relationships between the peeling force and peeling velocity, which depend on the viscous dissipation within the film and the rate-dependent adhesion at the interface. Additionally, factors such as film thickness, interfacial toughness, and interfacial strength are identified as influencing the steady-state peeling force.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Peter Noe Poulsen, John Forbes Olesen
Summary: Finite Element Limit Analysis (FELA) is increasingly used to calculate the ultimate bearing capacity of structures made of ductile materials. This study presents a consistent and general weak formulation based on virtual work for both the lower and upper bound problem, ensuring uniqueness of the optimal solution. A plane element with linear stress variation and quadratic displacement field is introduced, showing good results for load level, stress distribution, and collapse mechanism even for coarse meshes in verification and reinforced concrete examples.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
