Low volume-fraction microstructures in martensites and crystal plasticity

Mixed Mode Fracture in Reinforced Concrete with Low Volume Fraction of Steel Fibers

An investigation into the mixed mode fracture of steel fiber reinforced concrete (SFRC)beams with one percent volume fraction of steel fiber is presented. A series of notched beams withdifferent notch depths and locations are tested under three-point bending. The test results for apparentfracture toughness, crack trajectories, and fracture energy are presented. The crack paths for SFRCand plain...

Influence of hardening on the cyclic behavior of laminate microstructures in finite crystal plasticity

We investigate the cyclic behavior of laminate microstructures in finite-strain crystal plasticity and the resulting stress-strain response, based on a variational, incremental description of the microstructure evolution. The nonconvex free energy density in multiplicative singleand multi-slip plasticity gives rise to the formation of fine-scale deformation structures, experimentally observed a...

Improvements to the Computational Pipeline in Crystal Plasticity Estimates of High Cycle Fatigue of Microstructures

Training-induced criticality in martensites.

We propose an explanation for the self-organization towards criticality observed in martensites during the cyclic process known as "training." The scale-free behavior originates from the interplay between the reversible phase transformation and the concurrent activity of lattice defects. The basis of the model is a continuous dynamical system on a rugged energy landscape, which in the quasistat...

The crystal structure of thermally- and stress-induced Martensites in Ni2MnGa single crystals

Deformation behavior of Ni~mnGa single crystals uniaxially loaded in compression and tension along the (100) p j and 1110) pj axes were investigated. It was shown that three successive stress-induced structural transitions may be observed for specimens tensed along Ihe