The band structure (BS) of Si with arbitrary stress/strain conditions has been calculated using the empirical non-local pseudopotential method (EPM). It is shown that the change of the effective masses cannot be neglected for general stress conditions and how this effect together with the strain induced splitting of the conduction bands can be used to optimize electron mobility enhancement Δμn....

This paper presents a simple method based on strain energy density criterion to study the crack initiation angle by finite element method under biaxial loading condition. The crack surface relative displacement method is used to eliminate the calculation of the stress intensity factors which are normally required. The analysis is performed using higher order four node quadrilateral element. The...

Abstract In this study, numerical simulations of uniaxial compression, biaxial and unloading were performed on granite specimens that contained different prefabricated defects. The microscopic parameters in models verified by the compression experiments intact standard cylindrical specimen square with influences from stress paths, shapes defects, numbers distribution defects strength, deformati...

The mechanical response of cohesionless granular materials under monotonic loading is studied by performing molecular dynamic simulations. The diversity of shapes of soil grains is modelled by using randomly generated convex polygons as granular particles. Results of the biaxial test obtained for dense and loose media show that samples achieve the same void ratio at large strains independent of...

The macroscopic viscoelastic behavior of collagen gel was studied through relaxation time distribution spectrum obtained from stress relaxation tests and viscoelastic constitutive modeling. Biaxial stress relaxation tests were performed to characterize the viscoelastic behavior of collagen gel crosslinked with Genipin solution. Relaxation time distribution spectrum was obtained from the stress ...