Fully-strained single-crystal metastable Ge12xSnx alloys were grown on Ge~001! up to their critical epitaxial thickness values tepi(x) in order to probe surface roughening pathways leading to heteroepitaxial breakdown during low-temperature molecular-beam epitaxy under large compressive strain. All films with x.0.09 have comparable roughnesses while films with x,0.09 are considerably rougher wi...

The evolution of strain and development of material anisotropy in models of Earth’s mantle flow convey important information about how to interpret the geometric relationship between observation of seismic anisotropy and the actual mantle flow field. By combining feature extraction techniques such as path line integration and tensor accumulation, we compute time-varying strain vector fields tha...

A new plasticity integration algorithm is proposed based upon observations from the closed form integration of a generalized quadratic yield function over a single time step. The key to the approach is specification of the normal to the plastic flow potential as a function of the current state and strain increment. This uniquely defines the direction of the stress tensor for a convex, non-facet...

We propose a theoretical framework for predicting the protocol dependence of the jamming transition for frictionless spherical particles that interact via repulsive contact forces. We study isostatic jammed disk packings obtained via two protocols: isotropic compression and simple shear. We show that for frictionless systems, all jammed packings can be obtained via either protocol. However, the...

A fiber-optic delay based strain sensor with high precision and temperature insensitivity was reported, which works on detecting the delay induced by strain instead of spectrum. In order to analyze the working principle of this sensor, the elastic property of fiber-optic delay was theoretically researched and the elastic coefficient was measured as 3.78 ps/km·με. In this sensor, an extra refere...

Strain-iocalimtion instabilities due to strain-softening which result from distributed damage such (IS cracking in heterogeneous brittle materials are analyzed. Attention is restricted to the stability problem of equilibrium states. This problem is not equivalent to bifurcation of the equilibrium path. which may occur before stability of Lquilibrium is lost. The continuum is local but is enhunc...

Langmuir monolayers as disordered solids: Strain-state calculations applied to stearic acid" (1997). This paper presents a calculational procedure to determine the equilibrium phase for a given surface pressure ␲. The monolayer is treated as orientationally free tails grafted to a two-dimensional net formed by the head groups of the amphiphilic molecules. The head groups form a subsystem with t...

The forming limit diagrams (FLDs) characterizing the formability of sheet metals are usually obtained by applying proportional loadings. Nevertheless, industrial processes involve strain path changes that can modify limit-strain values. In addition, for strongly anisotropic such as Zn-Cu-Ti zinc alloy, large differences in curves (FLCs) with respect to rolling direction observed. present work, ...