As a part of an ongoing effort to study the continuum mechanics effects associated with cryopreservation, the current report focuses on fracture formation in vitrified thin films of cryoprotective agents. The current study combines experimental observations with continuum mechanics analysis. Experimental results have been developed using a new imaging device, termed a "cryomacroscope", which ha...

It is well known that when coarse-grained metals undergo severe plastic deformation to be transformed into nano-grained metals, their ductility is reduced. However, there are no ductile fracture criteria developed based on grain refinement. In this paper, we propose a new relationship between ductile fracture and grain refinement during deformation, considering factors besides void nucleation a...

In several practical cases, the ultimate ductile fracture strain determined with tensile test is accepted as a material plasticity measure 1 . In this case, the plasticity has to be defined as an ability of a material to accommodate high permanent strains until fracture appears where this strain reaches certain value called ultimate fracture strain p. The strain value until fracture depends not...

In this paper, we investigate the effects of the non-singular stress (T stress) on the mode I near-tip fields lbr elastic perfectly plastic pressure-sensitive materials under plane-stress and small-scale yielding conditions. The T stress is the normal stress parallel to the crack faces. The yield criterion for pressure-sensitive materials is described by a linear combination of the effective st...

• A new phase-field approach for shear bands plus ductile fracture is presented. Several failure mechanisms are also captured by the proposed formulation. Shear band formation achieved means of a degradation function. Potentially high computational cost tackled parallel implementation. Modeling complex material with competing difficult task that often leads to mathematical and numerical challen...

Micromachining repair of surface defects on KH2PO4 (KDP) optics is an emerging technique in the construction Inertial Confinement Fusion facilities for obtaining clean nuclear fusion energy. However, this method yet facing considerable challenges owing to soft-brittle nature single-crystal KDP, hence it necessary understand its ductile-regime cutting mechanism generate crack-free surfaces. This...