We analyze a quasi-static Biot system of poroelasticity for both compressible and incompressible constituents. The main feature this model is nonlinear coupling pressure dilation through the system's permeability tensor. Such has been analyzed previously from point view constructing weak solutions fully discretized approach. In treatment, we consider simplified Dirichlet type boundary condition...

In this study, the missile staging process by implementing a side-injected jet is simulated numerically. The problem is considered to be axisymmetric and the thin shear layer approximation of Navier-Stokes equations along with an algebraic turbulence model is used in a quasi-static form for the calculations. The free stream corresponds to a very high altitude flight condition with a Mach number...

Results from a combined experimental and numerical investigation into the effects of rate on mode-II fracture of a plastically-deforming, adhesively-bonded joint are presented. It is shown that a cohesive-zone model has to be modified to include coupling between normal and shear modes of deformation when there is extensive shear deformation of the adhesive layer. A suitable cohesive-zone modeli...

Slow, large deformations of human brain tissue—accompanying cranial vault deformation induced by positional plagiocephaly, occurring during hydrocephalus, and in the convolutional development—has surprisingly received scarce mechanical investigation. Since the effects of these deformations may be important, we performed a systematic series of in vitro experiments on human brain tissue, revealin...

Abstract Strain rock burst is one of the main types bursts. Studying mechanical response and acoustic emission characteristics coal under quasi-static loading significant to control prevent strain In this paper, coal’s strength, deformation, energy evolution, failure were analyzed with different rates loading. The strength show a rate effect certain extent elastic modulus decreases first then i...

Application of impact energy absorption systems in different industries is of special significance. Thin-walled tubes, due to their lightness, high energy absorption capacity, long crushing length and the high ratio of energy absorption to weight, have found ever-increasing application as one of the most effective energy absorption systems. In this research, through  carrying out experimental t...

The mechanical response of materials under shock loading conditions is governed, as indeed it is at lower strain-rates by events occurring at the microstructural level. However, since shock loading experiments occur under conditions of one-dimensional strain (rather than the more familiar onedimensional stress of quasi-static loading conditions), the generation of useful, quantitative microstru...

A novel composite architecture consisting of a periodic arrangement of closely-spaced spheres of a stiff material embedded in a soft matrix is proposed for extremely high damping and shock absorption capacity. Efficacy of this architecture is demonstrated by compression loading a composite, where multiple steel balls were stacked upon each other in a polydimethylsiloxane (PDMS) matrix, at a low...

Abstract Young’s modulus of New Red Sandstone was investigated experimentally to gain insight into its nonlinear nature. A large experimental programme carried out by applying a controllable quasi-static and dynamic uniaxial loading 286 dry sandstone samples four different sizes. The static tests, similar those aiming at determining the compressive strength, were conducted using state-of-the-ar...