Article
Mechanics
Omid Azarniya, Gholam Husain Rahimi
Summary: In this paper, the hyperelastic behavior of a sandwich beam and isotropic beam is analyzed numerically and experimentally. The natural rubber's mechanical properties are obtained through an axial tensile test based on ASTM D412 standard. The displacement and strain distribution are extracted using the Digital image correlation method in the experimental bending test.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Mechanics
O. Azarniya, A. Forooghi, M. V. Bidhendi, A. Zangoei, S. Naskar
Summary: The objective of this paper is to investigate the buckling and post-buckling behavior of hyperelastic beams using computational and experimental methods. Natural rubber is used to construct a square cross-sectional beam. The mechanical properties of natural rubber are determined through a uniaxial tensile test. The nonlinear behavior of rubber in finite element modeling is modeled using hyperelastic theory and the Yeoh strain energy function.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Chemical
Farid S. El-Askary, Satoshi Yamaguchi, Atsushi Mine, Ranna Kitagawa, Nanako Hirose, Mikako Hayashi
Summary: The study found that the torsion test was better than the shear test in evaluating the bonding of resin composite core to both zirconia and resin composite CAD/CAM blocks, due to its uniform tensile stress distribution and unidirectional displacement at the bond interface.
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2022)
Article
Construction & Building Technology
R. Wang, J. J. Shi, M. K. Xia, Z. Li
Summary: This research developed practical test methods to evaluate the rolling shear properties of cross-laminated bamboo and timber panels and reported experimental data on shear performance. Core wood's rolling shear performance was found to be determined by geometrical parameters in the RT plane.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Bac Mai, Gregory J. Hancock, Giang D. Nguyen, Cao Hung Pham
Summary: This study presents experimental observations of cold-reduced G450 sheet steel subjected to shear, using Digital Image Correlation technique to obtain full fields of displacement and strain. The experimental results show that the steel follows von Mises criterion during shear and has a high ultimate shear strength to tensile strength ratio.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Construction & Building Technology
Mehran Motevalli, Daniel Balzani
Summary: This article investigates a recently proposed orthotropic nonlinear material model for woven fabrics, which is applied to glass-PTFE and PES-PVC fabrics. The model contains three governing stiffness-related material properties that are uniquely identified using a new optimization procedure based on the separation of model and material parameters. The optimized model parameters are then used to identify the associated stiffness-related material parameters, resulting in an efficient method for independent identification of model and material parameters.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Mohammad Reza Vaziri Sereshk, Eric J. Faierson
Summary: In order to determine shear response for lattices, relevant standards were studied and a V-notched beam shear test set-up was developed. Various considerations and features were taken into account, including the number of cells for representative properties, the free-end condition for pure shear loading, and the use of Digital Image Correlation (DIC) method for improved accuracy. The obtained shear properties can be used for material specification, research and development, and structural design and analysis of lattices.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Construction & Building Technology
Ye Yuan, Qilin Zhang, Xiaoqun Luo, Ruijie Gu
Summary: This study investigated the mechanical properties of STFE, a new type of reinforced polymer building membrane material. Various mechanical tests were conducted to obtain the material's basic mechanical parameters, and linear and nonlinear stress-strain mechanical models were proposed. The research results lay the preliminary foundation for the application of this material in large-span tensile transparent membrane structures.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Mechanics
Andre Luis Ferreira da Silva, Ruben Andres Salas, Emilio Carlos Nelli Silva
Summary: Fiber reinforced materials are widely used in engineering applications, and new additive manufacturing technologies allow for the construction of composite structures with different shapes and desired fiber orientation. However, determining the optimal fiber orientation often faces the issue of multiple local minima.
Article
Engineering, Biomedical
Ned C. Rouze, Annette Caenen, Kathryn R. Nightingale
Summary: This study derives the relationship between the phase velocities of SH and SV propagation modes and the propagation direction in incompressible, hyperelastic materials. Sample results for different material models are presented, demonstrating the significance of understanding shear wave propagation characteristics and material properties.
PHYSICS IN MEDICINE AND BIOLOGY
(2022)
Article
Chemistry, Physical
Rebecca Grazzini, Giulia Misseri, Luisa Rovero
Summary: The research presents a novel interpretation of three-point and four-point bending tests on mortars using a bi-modulus material model, which considers asymmetric constitutive laws. Euler-Bernoulli and Timoshenko bi-modulus beam models are defined, and the related displacement fields are reported for both three-point and four-point loading. Experimental tests, including uni-axial tension and compression tests, three-point and four-point bending tests, and mode-I fracture energy tests on notched specimens, were conducted on lime mortar specimens using traditional contact (CE-DT) and contactless (DIC) measurement systems. The results provided the values of mechanical characteristics and validated the estimations of the analytical model. The experimental analysis also showed the bi-modulus behavior during the four-point bending tests, with visible shifting of the neutral axis. The bi-modulus analytical model yielded closer results to the experimental ones for slender specimens subjected to four-point bending.
Article
Engineering, Multidisciplinary
Akshay Joshi, Prakash Thakolkaran, Yiwen Zheng, Maxime Escande, Moritz Flaschel, Laura De Lorenzis, Siddhant Kumar
Summary: In this paper, an unsupervised Bayesian learning framework is proposed for the discovery of parsimonious and interpretable constitutive laws. The method leverages full-field displacement and global reaction force data, and utilizes a large catalog of candidate functional features to construct constitutive model ansatz. The hierarchical Bayesian model with sparsity-promoting priors and Monte Carlo sampling efficiently solves the model selection task and discovers physically consistent constitutive equations.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Polymer Science
Sondre Ostli Rokvam, Nils Petter Vedvik, Lukas Mark, Eivind Romcke, Jon Schawlann Olnes, Luca Savio, Andreas Echermeyer
Summary: Adaptive composite propeller blades with bend twist behaviour have attracted interest from engineers for their potential of higher energy efficiency and lower noise and vibration levels under periodic loading conditions. A laboratory experiment verified the predicted elastic response of a 600 mm-long full-size hollow blade, showing that finite element modelling accurately captures the deformation patterns and twist angles of such propellers.
Article
Mechanics
Jie Wang, Mario Roveroni, Giovanni Meneghetti, Guangbo Hao
Summary: This paper investigates a Miura-ori structural sandwich core with open cells and presents a fully parametric design approach to analyze the effect of different geometries on the resulting structure. By using kinematic model and finite element analysis, the best parameter combination for the structure was found. Experimental tests validated the accuracy of the model.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Review
Computer Science, Interdisciplinary Applications
Alexander Ricker, Peter Wriggers
Summary: Hyperelasticity is a common modeling approach used to replicate the nonlinear mechanical behavior of rubber materials at finite deformations. This manuscript provides an overview of suitable hyperelastic models for nine widely used rubber compounds, including both isochoric and volumetric behavior. It discusses the careful preparation of experimental data, including proper handling of preload in tests and verification of data consistency. The parameter identification process is also studied, including different formulations of the cost function and their effect on fitting results. Ultimately, this contribution serves as a guideline for experimental characterization, data processing, model selection, and parameter identification for both existing and new materials.
ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING
(2023)
Article
Materials Science, Characterization & Testing
F. Tariq, M. Khan, M. Farhan, M. Z. Siddiqui
JOURNAL OF TESTING AND EVALUATION
(2018)
