The present study aims to investigate the interaction of ratcheting and fatigue phenomena for additively manufactured (AM) samples SS304L AlSi10Mg undergoing uniaxial asymmetric stress cycles. Overall damage was accumulated through on AM prepared from three-dimensional-printed plates along vertical horizontal directions. Fatigue evaluated based strain energy density approach calculated use an i...

Dynamic recrystallization (DRX) processes are widely used in industrial hot working operations, not only to keep the forming forces low but also to control the microstructure and final properties of the workpiece. According to the second derivative criterion (SDC) by Poliak and Jonas, the onset of DRX can be detected from an inflection point in the strain-hardening rate as a function of flow st...

Abstract In this study, a new method for determining the material parameters of cyclic plasticity is presented. The can be applied to evaluate model from any loading histories measured experimentally. experimental data require basic processing only utilized. calibrate different elastoplastic models such as Chaboche–Rousselier (Ch–R) constitutive equation or other formulations which use rules is...

Two parameters are identified for characterizing the deformation in the plastic zone near the tip of a crack when mixed mode conditions prevail. Details of the near-tip stress and strain distributions are presented f or hardening materials in which a diffus e plastic zone occurs under plane stress conditions. For small scale yielding the two near-tip parameters are related to the two elastic s ...

The evolution of plastic deformation and damage in steel frame buildings caused by seismic action is simulated based on a modified damage model. This model combines nonlinear isotropic and kinematic hardening criteria with a damage evolution law expressed in terms of plastic displacement. A nine-story steel frame is chosen as a reference structure, and a nonlinear damage analysis is performed u...

Recently, an alkaline earth hydride CaH$_6$ having a sodalitelike clathrate structure has been experimentally synthesized at megabar pressures with maximum $T_c$ of 215 K, comparable to that rare LaH$_{10}$. Here, based on first-principles calculations, we find exhibits huge peak in the Eliashberg spectral function ${\alpha}^{2}F$ around low-frequency region H-derived phonon modes, contrast LaH...

In this paper we address the issues of using edge detection techniques on facial images to produce cancellable biometric templates and a novel method for template verification against tampering. With increasing use of biometrics, there is a real threat for the conventional systems using face databases, which store images of users in raw and unaltered form. If compromised not only it is irrevoca...

Sn-Pb eutectic solder alloy is extensively used in microelectronics packaging interconnects. Due to the high homologous temperature, eutectic Sn-Pb solder exhibits creepfatigue interaction and significant time-, temperature-, stress-, and rate-dependent material characteristics. The microstructure is often unstable, having significant effects on the flow behavior of solder joints at high homolo...

This paper provides a short Matlab implementation with documentation of the P1 finite element method for the numerical solution of viscoplastic and elastoplastic evolution problems in 2D and 3D for von-Mises yield functions and Prandtl-Reuß flow rules. The material behaviour includes perfect plasticity as well as isotropic and kinematic hardening with or without a viscoplastic penalisation in a...