An element test specimen with ply drops, intended to be representative of a composite structure varying thickness such as the main laminate in wind turbine rotor blade structure, is used investigate fatigue damage initiating from drop under cyclic tension–tension loading. The focus measure growth rate delamination cracks propagating thin towards thicker section. Several delaminations initiate t...

The biological underpinnings of borderline personality disorder (BPD) and its psychopathology including states of aversive tension and dissociation is poorly understood. Our goal was to examine transcriptional changes associated with states of tension or dissociation within individual patients in a pilot study. Dissociation is not only a critical symptom of BPD but has also been associated with...

We numerically examine the extension of tethered worm-like chains in shear flow, obtaining agreement with scaling arguments that invoke thermal fluctuations and the specific nonlinearity of the WLC force law. The transient tension distribution is obtained and likewise found to reflect nonlinearity and finite extensibility. Cyclic dynamics of the chain free end are observed. Numerical simulation...

Internal stress associated with an oriented microstructure of defects are taken into ac count in the thermoelastic balance of martensitic phase transition. From this analysis a macros copic flow rule is determined for the TWME by using a phenomenological approach based on a yield criterion derived from Gibb's free energy expression. Experiments perfor med on a Cu-Zn-A1 polycrystalline alloy tra...

because of low its thermal conductivity.[5,6] To the authors’ CELLULAR metals have been shown to experience knowledge, there have been no studies either in metals or fatigue degradation in both tension and compression.[1,2] This polymers of heat generated locally around stationary cracks degradation is manifested as a rapid increase in strain after subject to cyclic loading. a quiescent nucleat...

This paper describes the main results obtained from a detailed experimental investigation into dislocation and twinned structures that develop in dual phase (DP) steel sheets. In particular, morphology defect-structures present DP 1180 having 55% ferrite 45% martensite, were examined using transmission electron microscopy (TEM). Microstructure of as-received consists twin-free martensite form l...

An experimental study of the fatigue life of cortical bone screws under conditions which stimulated in vivo usage was performed. The two most important factors influencing fatigue life were axial screw tension (the force normal of the plate to bone) and the cyclic shearing load. All screws failed at the root of the thread in the interface between the plate and the bone. A modified screw design ...

This paper presents a constitutive model capable of predicting the anisotropic viscoelastic behavior of balloon film subject to large strains and cyclic loading. The model is based on the free volume theory of nonlinear viscoelasticity enhanced with a switching rule for treating loading and unloading differently. The model has been implemented in the finite element analysis program Abaqus/Stand...