Despite the importance of multiaxial failure of trabecular bone in many biomechanical applications, to date no complete multiaxial failure criterion for human trabecular bone has been developed. By using experimentally validated nonlinear high-resolution, micromechanical finite-element models as a surrogate for multiaxial loading experiments, we determined the three-dimensional normal strain yi...

A yield criterion, not previously compared with the actual macroscopic behaviour of polymers, is herein compared with the pressure-modified octahedral shear stress criterion earlier suggested by others.This new relation, which is a version of the von Mises criterion, accommodates differences in tensile and compressive yield strengths and accounts for any dependence of yielding on the hydrostati...

Steady-state creep response in a rotating disc made of Al-SiC particle composite having linearly varying thickness has been carried out using isotropic/anisotropic Hoffman yield criterion and results are comparedwith those using vonMises yield criterion/Hill’s criterion ignoring difference in yield stresses. The steady-state creep behavior has been described by Sherby’s creep law. The material ...

aftab cultivar originated from national cereal breeding programs .the new cultivar  was evaluated in international high rainfall wheat yield trial nursery at gachsaran and gonbad agricultural research stations (2008-2009). due to optimum grain yield and other agronomic traits, the new cultivar was tested in advanced yield trials in gachsaran, ilam, khoram abad and gonbad research stations (2009...

Vertical rolling is an important technique used to control the width of continuous casting slabs in hot-rolling field. Accurate prediction vertical force a core point maintaining rolling-mill equipment. Owing limitation algorithm use, accuracy most models based on energy method can only reach more than 10%. Therefore, it challenging optimize rolling-force model improve accuracy. An innovative a...

All yield criteria that determine the onset of plastic deformation in crystalline materials must be invariant under inversion symmetry associated with a simultaneous change sign slip direction and plane normal. We demonstrate consequences this on functional form effective stress, where only lowest order terms obey are retained. A particular criterion is obtained for do not Schmid law, hereafter...