...Saibal Kanchan Barik; R. Ganesh Narayanan; Niranjan Sahoo Selection of flow stress models and fracture models to model sheet deformation at high strain rates is of great concern. The same is attempted in the present work during shock tube impact forming of 1-mm-thick AA 5052-H32 sheet using a rigid...

... the sheet at different velocities. Here, the main objective is to understand the effect of flow stress models and fracture models on the forming outputs. The experimental situation is modeled in two stages, i.e., incorporating the pressure in the first stage and displacement of the striker in the second...

...Jian Zhang; Zhe Lu; Sugrim Sagar; Hyunhee Choi; Yeon-Gil Jung; Heesung Park; Dan Daehyun Koo; Jing Zhang In this work, the impact behavior of an alumina spherical particle on alumina coating is modeled using the smoothed particle hydrodynamics (SPH) method. The effects of impact angle (0 deg, 30...

..., where y 1 and y 2 are model constants. Under fully reversed strain control conditions, Y = y 1 . The cyclic plastic zone size is calculated using the nonlocal plastic shear strain with respect to the remote loading strain amplitude [ 5 ] (8) l D = η lim ɛ a - ɛ...

... on the critical depth of cut associated with ductile-to-brittle transition and crack generation are studied via an eXtended Finite Element Method (XFEM) based model, which is experimentally validated. Scribers with a large tip radius are shown to produce lower tensile stresses and a larger critical depth of cut...

... of circular fiber diameters are used in the representative volume element. 13 04 2011 13 07 2011 20 10 2011 20 10 2011 glass fibre reinforced composites numerical analysis organic-inorganic hybrid materials aspect ratio composites fiber strand finite elements modeling...

...–birefringence relationship using the Gent theory for rubber elasticity. The Gent constitutive model for the stress–stretch response has been shown to provide a nearly equivalent rubber elastic behavior as that of the widely used eight-chain model. By combining the simpler stress–stretch relationship from...

.... This analysis is followed and continued by a proper sintering model based on an elastic-viscous analogy that predicts the resulting local densities after sintering and also associated defects. So, from the two subsequent models, it becomes possible to get the final powder densities after processing...

.... , Zhu , S. J. , and Milicka , K. , 1998 , “ Creep Behavior of ODS Aluminum Reinforced by Silicon Carbide Particulates: ODS Al–30SiCp Composite ,” Mater. Sci. Eng., A , 248 , pp. 65 – 72 . Li , Y. , and Langdon , T. G. , 1999 , “ An Examination of a Substructure-Invariant Model...