Article
Mechanics
Sina Askarinejad, Emilio Martinez-Paneda, I. Ivan Cuesta, Norman Fleck
Summary: This study aims to develop a mechanics model for adhesive fracture of lap joints under shear loading. Crack initiation and growth in the joints are measured and monitored by Digital Image Correlation. The study assesses the ability of a cohesive zone model to predict various features of specimen failure in cases of high shear ductility adhesive layers.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Mechanics
Mathilde Zani, Daniele Fanteria, Anita Catapano, Marco Montemurro
Summary: This study presents a consistent energy-based cohesive zone model for simulating the mode I delamination behavior of FUMD laminates and validates the effectiveness of the model through experiments. The numerical simulations closely replicate the delamination behavior of DCB specimens, but with some differences compared to experimental results.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Chemical
Mohd Tauheed, Naresh Datla
Summary: This study investigates the fracture behavior of composite adhesive joints with both brittle and ductile epoxy adhesives using double cantilever beam specimens. Experimental results and digital image correlation are used to develop traction-separation laws for the adhesive joints. The finite element model accurately predicts the load response of the joints.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2022)
Article
Materials Science, Composites
O. Rodera, J. Jokinen, O. Orell, L. George, N. Pournoori, M. Kanerva
Summary: This study aims to realistically simulate the failure modes of film adhesives using a 3D multi-layer approach with a non-local Continuum Damage Model (CDM) and an in-built Cohesive Zone Model (CZM). The multi-layer damage model accurately predicts the strength and fracture properties of the adhesive and reproduces the local damage path near the adhesive-adherend interface.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
Qiong Rao, Zeyu Ouyang, Zaoyang Guo, Xiongqi Peng
Summary: In this study, a nonlinear cohesive/friction coupled model was proposed to analyze the mode II fracture of carbon fiber composite bonded joints with hybrid carbon nanofillers. Experimental results showed that the adhesive modified with 0.75 wt% MWCNTs/GNPs hybrid improved the fracture toughness by 45% compared to pure adhesive. The proposed model combined a phenomenological progressive rising friction model and an exponential cohesive zone model for the analysis of delamination in the adhesive layer.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2022)
Article
Engineering, Mechanical
P. F. Liu, J. W. Liu
Summary: This paper investigates the damage mechanisms of composite scarf adhesive joints with brittle adhesive material and explores the competitive relationships between the damage behaviors of the adhesive layer and interface debonding. The study develops damage initiation criteria and damage evolution laws for the epoxy adhesive layer. Finite element analysis is performed to study the two competitive damage mechanisms of the adhesive joints. The results show that the damage features of the adhesive layer become more important as the thickness increases beyond 1.0 mm.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Engineering, Chemical
Luis F. R. Neves, Raul D. S. G. Campilho, Isidro J. Sanchez-Arce, Kouder Madani, Chander Prakash
Summary: This article discusses the design and numerical modeling of adhesively-bonded components and structures, especially under mixed mode loading. Finite Element Method and Cohesive Zone Modeling are used to simulate and experimentally validate adhesive joints, and a parametric study is conducted to identify the parameters that have the greatest influence on joint behavior.
Article
Mechanics
Michele Calabretta, Alessandro Sitta, Salvatore Massimo Oliveri, Gaetano Sequenzia
Summary: The use of molding compound as encapsulant in semiconductor power modules is increasing. The adhesion between copper components and molding compound is crucial for durability. This study characterizes the fracture toughness of the copper-resin interface through experimental tests and cohesive zone method.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Engineering, Manufacturing
A. Wagih, M. Hashem, G. Lubineau
Summary: A bioinspired adhesive T-joint was developed to mimic the bondline in Mytilus californianus and improve the strength and toughness of T-joints through microstructural manipulation. The results showed that the bioinspired adhesive T-joint had a strength and toughness 3.27 and 18.9 times higher than the conventional T-joint, respectively, during the pull-off test. The progressive damage mode of the bioinspired adhesive T-joint provided protection against complete failure.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Engineering, Mechanical
Peer Schrader, Stephan Marzi
Summary: Two test setups are proposed for determining the critical mode III energy release rate (ERR) of adhesive joints. Nonlinear elastic fracture mechanics (J-integral) and linear elastic fracture mechanics (Irwin-Kies equation) are used for data evaluation. Crack length and process zone length are measured using backface strain measurements. The results show that the J-integral evaluation method is the most reliable for determining the mode III fracture energy.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Biology
Hossein Mohammadi, Arash Ebrahimian, Nima Maftoon
Summary: Medical needles have significant contributions to medical devices and surgical technologies, with finite element modelling aiding in optimizing designs and replicating experimental data. Friction coefficient affects needle reaction force, while cutting angle determines stress fields in skin tissue.
COMPUTERS IN BIOLOGY AND MEDICINE
(2021)
Article
Engineering, Chemical
Safdar Ali Khan, Seyed Saeid Rahimian Koloor, Wong King Jye, Noorfaizal Yidris, Ab Aziz Mohd Yusof, Mohd Al Fatihhi Mohd Szali Januddi, Mohd Nasir Tamin, Mahzan Johar
Summary: Adhesive bonding can join two different substrate materials together by forming chemical bonds. The mechanical properties of the adhesive material can easily change due to the loading rate and deformation mode. This study aims to evaluate the strain rate effect on the damage response of adhesive joints for Mode I loading scenarios. The experimental and FE simulation results show a good correlation.
Article
Materials Science, Composites
A. Wagih, G. Lubineau
Summary: Creating sacrificial cracks inside the adhesive can improve the mode II fracture toughness of secondary bonded joints by reducing strain concentration, delaying crack propagation, and increasing propagation fracture toughness. This technique is applicable to both thin and thick adhesives and is a simple yet effective way to enhance joint toughness.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Civil
Armin Yousefi Kanani, Xiaonan Hou, Rachael Laidlaw, Jianqiao Ye
Summary: A comparative study on different adhesive joint configurations revealed that the scarf joint performed the best. Increasing overlap length was beneficial for certain configurations while the mechanical properties of the adherends significantly affected failure mechanisms.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Mechanical
A. F. L. Macedo, R. D. S. G. Campilho, F. J. G. Silva, M. A. Bellali
Summary: This study numerically investigated the effect of adhesive thickness on the fracture behavior of adhesive joints and proposed a numerical technique for the analysis of mixed-mode bonded joints.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2022)
Article
Engineering, Mechanical
Raul D. F. Moreira, Marcelo F. S. F. de Moura, Filipe G. A. Silva, Jhonny S. Rodrigues, Fernando D. R. Silva
Summary: This study analyzed the fracture characteristics of bi-material bonded joints with aluminum-carbon fiber reinforced polymer (AL-CFRP) adherends under mixed-mode I + II loading. Five different and simple fracture tests were used to cover the complete mixed-mode I + II range and identify a representative energy-based fracture criterion.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Engineering, Chemical
Vitor H. P. Lopes, Raul D. S. G. Campilho, Paulo J. R. O. Novoa, Ricardo J. B. Rocha, Isidro J. Sanchez-Arce
Summary: Material selection is crucial in engineering as it affects performance and cost. This study investigates the adhesion of sheet moulding compound composites and carbon fibre reinforced composites through experiments and numerical analysis, and identifies the best joining solution.
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Mechanical
I. J. Sanchez-Arce, D. C. Goncalves, L. D. C. Ramalho, R. D. S. G. Campilho, J. Belinha
Summary: The implementation of the Ogden model into the NNRPIM allows for accurate modeling of hyperelastic behavior in rubber-like materials and biological tissues. The results show that the NNRPIM models have similar stress distributions to FEM models for strains below 10%, making it suitable for modeling neo-Hookean, Mooney-Rivlin, and Ogden materials.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Ricardo B. P. Barros, Raul D. S. G. Campilho, Isidro J. Sanchez-Arce, Joao M. M. Dionisio, Kouider Madani
Summary: This study conducted experimental and numerical analysis of the cracked lap shear test to estimate the mixed-mode fracture toughness of two structural adhesives. The experimental results showed that the Brussat's method was not suitable for this test, while the Grady and Kinloch's models were suitable for mixed-mode fracture analysis.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS
(2023)
Article
Engineering, Mechanical
C. F. M. Oliveira, M. F. S. F. de Moura, R. D. F. Moreira, R. J. B. Rocha
Summary: The Asymmetric Single-Leg Bending (ASLB) test was utilized to determine the fracture energy of a honeycomb/carbon-epoxy sandwich panel subjected to mixed-mode I + II loading. A data reduction method based on beam theory, specimen compliance, and equivalent crack length concepts was employed to establish the experimental Resistance curve (R-curve) for determining the mixed-mode fracture energy. Numerical analysis with cohesive zone modeling was employed for validation and as a suitable partition method for estimating the mode ratio. Given the observed nonlinear behavior, a mixed-mode I + II trapezoidal cohesive zone model and the quadratic energetic criterion were considered in the simulations.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Engineering, Chemical
P. A. R. Ferreira, R. D. S. G. Campilho, I. J. Sanchez Arce, D. C. Goncalves, C. Prakash
Summary: This work investigates the use of three structural adhesives with different properties in curved joggle-lap joints. The study validates a robust design procedure and provides project guidelines for the complex structural, geometrical, and loading system. A numerical cohesive zone model analysis examines the effects of overlap length, adherends' thickness, and adherends' curvature on the load-bearing capacity, failure mode, and energy dissipation. Ductile adhesives generally outperform brittle ones in terms of maximum load and energy dissipation.
JOURNAL OF ADHESION
(2023)
Article
Mechanics
Luis D. C. Ramalho, Isidro J. Sanchez-Arce, Diogo C. Goncalves, Raul D. S. G. Campilho, Jorge Belinha
Summary: The use of adhesive joints has increased due to their lighter weight compared to other joining alternatives. However, there is currently limited research on the free vibration response of adhesive joints. This study uses the Radial Point Interpolation Method (RPIM) to perform a parametric study of a Single Lap Joint (SLJ) for free vibration. The RPIM results are compared and validated with a Finite Element Method (FEM) solution of a Step-Lap Joint (S-LJ), showing similarity between the numerical approaches. The study reveals that changes to the adherents have a more significant impact on vibration modes than changes to the adhesive themselves.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
T. D. Campos, M. L. S. Barbosa, M. Martins, F. A. M. Pereira, M. F. S. F. de Moura, Quyen Nguyen, A. Zille, N. Dourado
Summary: In this study, the mechanical properties of PMMA-based cement-bone bonded joints were characterized using the end-notched flexure test. The crack equivalent concept and cohesive zone modeling approach were employed to overcome difficulties in crack length monitoring and determine the fracture toughness of the joints under pure mode II loading. The innovative aspect lies in the application of cohesive zone modeling approach to PMMA-based cement-bone bonded joints.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Chemistry, Physical
Ricardo J. B. Rocha, Marcelo F. S. F. de Moura, Raul D. F. Moreira
Summary: The fracture behaviour of repaired honeycomb/carbon-epoxy sandwich panels under different loading conditions was analyzed in this study. A repair strategy involving plug filling the core hole and using two scarf patches was implemented, and experimental tests were conducted to assess the repair efficiency. It was found that the repair restored a significant portion of the mechanical properties of the panels. Additionally, a three-dimensional finite element analysis with a mixed-mode cohesive zone model was used to provide further insights into the repair procedure.
Review
Materials Science, Multidisciplinary
A. F. V. Pedroso, V. F. C. Sousa, N. P. V. Sebbe, F. J. G. Silva, R. D. S. G. Campilho, R. C. M. Sales-Contini, A. M. P. Jesus
Summary: Nickel-based superalloys, such as INCONEL (R) variants, are increasingly used in various industries due to their high-temperature resistance and resistance to creep. However, they are considered difficult-to-cut materials because of their poor thermal conductivity and work hardening, which can lead to tool wear and poor finishing. Therefore, optimizing machining parameters is crucial for improving the quality and cost of the product.
Article
Engineering, Electrical & Electronic
Manuel Gaspar, Francisco J. G. Silva, Arnaldo G. Pinto, Raul D. S. G. Campilho
Summary: The automotive industry demands high quality products at low prices, which requires constant innovation and competitiveness. The diversification of car models has necessitated flexible manufacturing processes. This study successfully developed a new concept for producing bent wires used in car seat cushions, which increased production rate and flexibility while reducing costs.
Article
Engineering, Electrical & Electronic
Pedro Pereira, Raul Campilho, Andry Pinto
Summary: Unmanned aerial vehicle (UAV) technology is used for inspection operations in offshore structures. The concept of a four-link parallel platform is proposed to facilitate UAV landings. The platform uses an inverse kinematics approach and a feedback controller to reduce motion. The control system is validated using ROS and Gazebo.
Article
Mechanics
A. Majano-Majano, A. J. Lara-Bocanegra, F. Pereira, J. Xavier, J. Morais, M. F. S. F. de Moura
Summary: The fracture characterization of Eucalyptus globulus Labill. bonded joints with one-component polyurethane adhesive (1C-PUR) under mode I loading is investigated in this study. The objective is to estimate the cohesive law that represents the fracture behavior of these joints. Two inverse procedures and a direct method are utilized for determining the softening laws, with the direct method based on the measurement of crack tip displacements using digital image correlation during Double Cantilever Beam (DCB) tests. It is concluded that consistent results can be obtained from all three methodologies, with the classical inverse procedure being the most appealing due to its simplicity.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Electrical & Electronic
Eduardo Eiras, Francisco J. G. Silva, Raul D. S. G. Campilho, Rita C. M. Sales-Contini, Andre F. V. Pedroso, Naiara P. V. Sebbe
Summary: The automotive industry requires flexible and efficient production equipment to reduce costs and meet customization demands. This study successfully increased the flexibility and productivity of production equipment through the development of new mechanical concepts and application of automation, reducing setup time and operator risks.
Editorial Material
Engineering, Electrical & Electronic
Raul D. S. G. Campilho, Francisco J. G. Silva
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)