2025-04-09 09:00:00
In our past work, molecular dynamic (MD) simulation of interphases between S-glass and epoxy matrices have been conducted to predict strain rate dependent mixed-mode cohesive traction surface for bridging to the micromechanics length scale. Silane is an important component of a composite material which…
Reducing the weight of vehicles is a key challenge to reduce energy consumption in many fields. Polymers can be a lighter replacement to metal in a lot of structural applications. The structure of amorphous polymers is complex and the macroscopic behavior may exhibit different…
Existence of undulating fill and warp yarns in woven composite laminae introduce complex unit cell geometries and multi-scale interactions among the constituents. This coupled with high-strain-rate dynamic out of plane loading (such as blast or impact) induce damage to the lamina involving several micro…
Dense granular media is prevalent in a myriad of applications ranging from soil reinforcement in construction to manufacturing in the pharmaceutical industry. When compressed, two subnetworks with different loading characteristics are formed: a strong network, which is made up of force chains consisting of…
Microstructural features across the nano- to meso-scale are known to influence the quasi-static properties and dynamic response of multiphase ceramic composites. To elucidate the individual and correlated contributions of the microstructure, a multi-scale modeling effort spanning first principles and classical atomistics to mesoscale Potts…
The mechanics of concrete can be understood comprehensively only if its heterogeneous microstructure is considered in experiments and simulations. The influence of heterogeneities on local stress and strain fields remains under-explored with no experimental validation. We combine mesoscale modeling, in-situ X-ray computed tomography imaging,…
Material modeling for micromorphic continua (in the sense of Eringen and Suhubi [IJES, 1964]) of combined viscoelastic-viscoplastic constitutive nonlinearity is developed for the first time – e.g., applicable to asphaltic and polymer-bonded granular matter – and, in so doing, is recast in a compact…
Statistical Volume Elements (SVEs) are used to homogenize apparent elastic and fracture properties of material at length scales smaller than commonly used Representative Volume Elements (RVEs). Two of the key consequences are maintaining inherent material heterogeneity and sample-to-sample variations. These aspects are specifically important…
A machine learning-based constitutive model is proposed to capture the strain rate-dependent, nonlinear stress-strain response of soft tissues. The total stress in the general functional form of this model is additively decomposed into a volumetric, an isochoric hyperelastic, and a viscous overstress component. Each…
Many biological materials, including the extracellular matrix, connective tissue, blood vessels and various membranes have a network of collagen/elastin fibers as their main structural constituent and are classified as Network materials. The accumulation of damage and rupture in these materials leads to pain and…
