25 papers · ranked by Valyu relevance
Sungchul Kim, Miguel Cervera, Jian-Ying Wu, Michele Chiumenti + 1 more
'Mikko Alava'] Strain localization analysis for orthotropic-associated plasticity in cohesive-frictional materials is addressed in this work. Specifically, the localization condition is derived from Maxwell’s kinematics, the plastic flow rule and the boundedness of stress rates. The analysis is applicable to strong and…
Jian-Ying Wu, Miguel Cervera, Yong-Cheng Lin
Damage-induced strain softening is of vital importance for the modeling of localized failure in frictional-cohesive materials. This paper addresses strain localization of damaging solids and the resulting consistent frictional-cohesive crack models. As a supplement to the framework recently established for stress-based…
Pengfei Gao, Yanxi Li, Ronghai Wu, Zhenni Lei + 2 more
Grain-scale strain heterogeneity characteristics play a critical role in the ductile damage behavior and mechanical properties of two-phase titanium alloys. In this work, the grain-scale strain distribution, strain heterogeneity, and strain localization of titanium alloy with tri-modal microstructure (consisting of…
Timothy J. Rupert
Molecular dynamics simulations are used to investigate strain localization in a model nanocrystalline metal. The atomic mechanisms of such catastrophic failure are first studied for two grain sizes of interest. Detailed analysis shows that the formation of a strain path across the sample width is crucial, and can be…
N. Bordignon, A. Piccolroaz, F. Dal Corso, Davide Bigoni
A model of a shear band as a zero-thickness nonlinear interface is proposed and tested using finite element simulations. An imperfection approach is used in this model where a shear band, that is assumed to lie in a ductile matrix material (obeying von Mises plasticity with linear hardening), is present from the…
Omar León, Victor José Ramirez Rivera, Angel Vázquez‐Patiño, Jacinto Ulloa + 1 more
localization as a sharp discontinuity Authors: ['Omar León' 'Victor José Ramirez Rivera' 'Angel Vázquez‐Patiño' 'Jacinto Ulloa' 'Esteban Samaniego'] We present an exploratory study of the possibilities of the Deep Ritz Method (DRM) for the modeling of strain localization in solids as a sharp discontinuity in the…
Antoine B. Jacquey, Hadrien Rattez, Manolis Veveakis
Strain localization is an instability phenomenon occurring in deformable solid materials which undergo dissipative deformation mechanisms. Such instability is characterized by the localization of the displacement or velocity fields in a zone of finite thickness and is generally associated with the failure of materials.…
Jian Li, Qianhua Kan, Kaijuan Chen, Zhihong Liang + 1 more
In situ monotonic tensile experiments of thermo-induced shape memory polyurethane (SMPU) at different loading rates were carried out by the digital image correlation (DIC) method and infrared camera FLIR®-A655sc in natural convection (NC) and forced convection (FC) conditions, respectively. The multiform strain…
Jie Li, Bo Huang, Jun Shen, Jun Yi + 4 more
'Gang Wang' 'Danny V. van Hemelrijck'] Optimizing the mechanical properties of composites through microstructural design has been a long-standing issue in materials science. In this study, we reinforced a typical polymer, i.e., polyethylene-terephthalate-woven fabric, with a type of Fe-based metallic glassy fiber (MGF)…
Alexandros Stathas, Ioannis Stefanou
Strain localization is responsible for mesh dependence in numerical analyses concerning a vast variety of fields such as solid mechanics, dynamics, biomechanics and geomechanics. Therefore, numerical methods that regularize strain localization are paramount in the analysis and design of engineering products and…
Charilaos Mylonas, George Tsialiamanis, Keith Worden, Eleni Chatzi
A common shortcoming of vibration-based damage localization techniques is that localized damages, i.e. small cracks, have a limited influence on the spectral characteristics of a structure. In contrast, even the smallest of defects, under particular loading conditions, cause localized strain concentrations with…
Hongqiao Yan, Molin Su, Fangwei Luo, Ruijing Jiang + 1 more
To investigate the effect of crack geometry on tensile deformation and strain localization in X46 pipeline steel thin-walled tubes, uniaxial tensile tests were conducted on specimens containing prefabricated cracks with different sizes, types, and orientations, and full-field strain evolution was characterized by…
Keshia E. Mora, Samuel J. Mlawer, Alayna E. Loiselle, Mark R. Buckley
Mechanical deformation applied to tendon at the tissue-scale is transferred to the microscale — including the extracellular matrix (ECM), the pericellular matrix (PCM), the cell and the nucleus — through a process known as strain transfer. Microscale strains, in turn, trigger biological activity that plays an important…
Megan E. Mancuso, Karen L. Troy
Work in animal models suggest that bone structure adapts to local bone strain, but this relationship has not been comprehensively studied in humans. Here, we quantified the influence of strain magnitude and gradient on bone adaptation in the forearm of premenopausal women performing compressive forearm loading (n=11)…
Sophie Chagnon-Lessard, Hubert Jean-Ruel, Michel Godin, Andrew E. Pelling
In the body, mechanical stress arising due to movement exposes cells to complex and anisotropic strains and strain gradients. Employing an innovative microfabricated device, we have uncovered how strain gradients can act as an important biological signal. Our device enables the systematic investigation of strain and…
Feiyu Yang, Yubing Sun
Strain gradients, the percentage of the deformation changed across a continuous field by applying forces, have been observed in developing tissues due to the inherent heterogeneity of the mechanical properties. The directional movement of cells are essential for proper cell localization, and it is well-established that…
Authors not listed
Hydrogen embrittlement severely degrades mechanical properties of austenitic stainless steels (γ-SS), yet the bulk deformation microstructures responsible for this phenomenon have not been directly observed. While the internal microstructure is essential to define metal plasticity, deformation, and fracture, no…
Jing Yang, Yicheng Dong, Carter B. Jones, Yingli Wang + 3 more
Mechanical forces play crucial roles in epithelia tissue morphogenesis and function, yet individual cells often respond differently to the same external force. Strain heterogeneity, the non-uniform deformation of cells under uniform external mechanical stimuli, may underlie tissue-level robustness and guide…
Authors not listed
Embedding mechanophores into polymer matrices to activate mechanochemical reactions has been extensively employed to realize diverse functional applications. Spiropyran (SP) is a widely used mechanophore that undergoes force-induced isomerization into its activated merocyanine (MC) form, accompanied by a color change.…
Authors not listed
Stretchable electronics require sophisticated fabrication strategies to achieve both high electrical performance and mechanical compliance. While various approaches exist, from geometric designs to composite materials, most face challenges in balancing fabrication complexity with device performance. Here, we present a…
P.S. Mathieu, E. Fitzpatrick, M. Di Luca, P.A. Cahill + 1 more
Cardiovascular disease is the leading cause of death worldwide, with multipotent vascular stem cells (MVSC) implicated in contributing to diseased vessels. MVSC are mechanosensitive cells which align perpendicular to cyclic uniaxial tensile strain. Within the blood vessel wall, collagen fibers constrain cells so that…
Authors not listed
Shaping supramolecular hydrogels formed using low molecular weight gelators (LMWGs) into architecturally complex and multifunctional materials is a significant challenge. Here, we introduce a strategy to mechanically twist multiple 1D supramolecular gel filaments (gel noodles) into robust, multifunctional, and…
Authors not listed
This study presents the use of laser-driven microbubbles for micro-patterning Ti3C2TX MXenes on flexible polyethylene terephthalate films, yielding conductive micropatterns without the need for pre- or post-processing. Characterization of the electrical properties under varying strain conditions revealed distinct…
Nathan Zhao, Zubaer Hossain
Phosphorene, a puckered 2D allotrope of phosphorus, has shown high carrier mobility and high surface-area to volume ratio allowing for many multifunctional applications. Because of this, phosphorene has seen much interest from industries such as electronics, photonics, biomedics, linear polarizers, and plasmonics. One…
Authors not listed
A glassy polymer containing a supramolecular mechanophore capable of responding to mechanical deformation is reported. The supramolecular mechanophore LOOP, which comprises two perylene diimide (PDI) connected by a flexible linker, was functionalized with an atom transfer radical polymerization initiator, allowing…