Mesh convergence is a vital issue that needs to be addressed in numerical model. This study investigated the effects of mesh element number on Discrete Element Method (DEM) granite rock response under compression loading. used 3D finite-element code LS-DYNA model Unconfined Compression Test (UCT) simulation. Models with five different types were conducted for mesh, namely normal fine super coar...

Introduction: Mechanical behavior of articular cartilage is a consequence of its collagen fibrillar network entrapping a proteoglycan dominant matrix swollen by electrolyte. Fibril reinforced poroelastic models which distinguish the two major solid components (fibrillar and nonfibrillar) have been able to account for several previously difficult to describe behaviors, such as the large transien...

This study investigates polyacrylamide (PA) gel as a calibration material to measure the nanomechanical compressive modulus of cartilage using nanoindentation. Both nanoindentation and unconfined compression testing were performed on PA gel and porcine rib cartilage. The equilibrium moduli measured by the two methods were discernable. Nanoindentation has the advantage of distinguishing between ...

Scaffolds are used in diverse tissue engineering applications as hosts for cell proliferation and extracellular matrix formation. One of the most used tissue engineering materials is collagen, which is well known to be a natural biomaterial, also frequently used as cell substrate, given its natural abundance and intrinsic biocompatibility. This study aims to evaluate how the macroscopic biomech...

The macroscopic cohesion of granular materials made up of sticky particles depends on the particle shapes. We address this issue by performing contact dynamics simulations of 2D packings of nonconvex aggregates. We find that the macroscopic cohesion is strongly dependent on the strain and stress inhomogeneities developing inside the material. The largest cohesion is obtained for nearly homogene...

The present article introduces a novel method of characterizing the macromechanical cartilage properties based on dynamic testing. The proposed approach of instrumented impact testing shows the possibility of more detailed investigation of the acting dynamic forces and corresponding deformations within the wide range of strain rates and loads, including the unloading part of stress-strain curve...