In this article, we examine the Young modulus of (6, m) boron-nitride nanotubes with vacancy and functionalization defects. We employ molecular dynamics simulations using the Parrinello-Rahman approach. To this end, all systems are modeled with a reactive many-body bond order Tersoff-potential with parameters due to Matsunaga et al [1], which is able to accurately describe covalent bonding. We ...

In sheet metal forming, very often, large plastic deformations are imposed to a thin plate. An accurate description of the material’s elastoplastic response is therefore paramount importance perform finite element (FE) simulations an actual forming operation. Reliable stressstrain data till significantly larger strains compared tensile tests can be identified by means bulge test. this work, dyn...

This research responds to a current phenomenon that individuals experience fatigue, while using social network sites, such as Facebook, which original intend to provide hedonic value to users. To explain this current phenomenon, we propose and evaluate a research model based on the stressstrain-outcome model. Focal point is the stressor social overload, which induces feelings of being emotional...

Constitutive equations for the multiaxial stress-strain behavior of aluminum alloy 5754 sheets were developed, based on crystal plasticity. A Taylor-based polycrystal plasticity model, a tangent formulation of the self-consistent viscoplastic model (VPSC), and an N-site viscoplastic model based on the fast Fourier transform (VPFFT) were used to fit a single slip system hardening law to the avai...

Constitutive equations of unsaturated soils are often derived in a thermodynamically consistent framework through the use a unique ’effective’ interstitial pressure. This later is naturally chosen as the space averaged interstitial pressure. However, experimental observations have revealed that two stress state variables were needed to describe the stressstrain-strength behaviour of unsaturated...

On the basis of the pseudopotential plane-wave(PP-PW) method and the local-density-functional theory(LDFT), this paper studies energetics, stressstrain relation, stability and ideal strength of β-SiC under various loading modes, where uniform uniaxial extension and tension, biaxial proportional extension are considered along directions [001] and [111]. The lattice constant, elastic constants an...

Heat-resistant austenitic stainless steels are widely used in the final stages of superheater and reheater new generation fossil fuel power stations, due to their high creep strength. Similar weld joints, fabricated using gas tungsten arc welding, for connecting different components made heat resistant usually suffer from premature failures at elevated temperature [1]. Experimental studies show...

Formula Student represents the main motorsport activity for future professionals during their academic preparation. There is intensive migration from prototypes with an internal combustion engine to electrical vehicles. The challenge of electric vehicles weight batteries which has be compensated. Topological Optimization process a method removing volume and mass component (elements mesh) aid di...

Fractures at the thoracolumbar junction are most common traumatic spinal injuries. Advances in instrumentation for vertebral body replacement have significantly improved surgical techniques.However, biomechanical characteristics of stabilizing surgeries been insufficiently studied. Objective. To investigate stressstrain state (SSS) a mathematical finite element model humanthoracolumbar spine du...