Ductile fracture through growth and coalescence of intergranular cavities is a failure mode observed experimentally in many metallic alloys used industrial applications. Simulation this process polycrystalline aggregates requires modeling the plastic yielding porous boundaries. However, classical yield criteria for materials such as Gurson–Tvergaard–Needleman model its current extensions cannot...

A bstract The structure of the Heisenberg evolution operators plays a key role in explaining diverse processes quantum many-body systems. In this paper, we discuss new universal feature operator evolution: an can develop void during its evolution, where nontrivial parts become separated by region identity operators. Such are present both integrable and chaotic systems, required unitarity. We sh...

Numerous theoretical and experimental efforts have been paid to describe and understand the dislocation and void nucleation processes that are fundamental for dynamic fracture modeling of strained metals. To date an essential physical picture on the self-organized atomic collective motions during dislocation creation, as well as the essential mechanisms for the void nucleation obscured by the e...

In this work, we have brought to light the effect of material orientation on void growth. For that purpose, performed finite element calculations using a cubic unit-cell model with spherical at its center and subjected periodic boundary conditions. The behavior is described an elastic isotropic, plastic orthotropic constitutive yielding defined by Yld2004-18p criterion (Barlat et al., 2005). We...

The compensatory growth, proximate composition and amino acid contents changes of young yellow catfish (Pelteobagrus fulvidraco R.) (1.63-1.69 g) had been investigated using a 45-day cyclic feed deprivation and re-feeding experiment. The control group (S0) was fed daily with live tubificid worms (Limnodrilus hoffmeisteri), while the S1/4, S1/2, and S1/1 groups cyclically experienced one-day of ...

urban settlements and their connectivity will be the dominant driver of global change during the twenty-first century. in an attempt to assess the effects of urban growth on available land for other uses and its associated impacts on environmental parameters, we modeled the change in the extent of gorgan city, the capital of the golestan province of iran. we used landsat tm and etm+ imagery of ...

The compensatory growth, proximate composition and amino acid contents changes of young yellow catfish (Pelteobagrus fulvidraco R.) (1.63-1.69 g) had been investigated using a 45-day cyclic feed deprivation and re-feeding experiment. The control group (S0) was fed daily with live tubificid worms (Limnodrilus hoffmeisteri), while the S1/4, S1/2, and S1/1 groups cyclically experienced one-day of ...