• In-situ monitoring of transverse cracks and delamination for CFRP laminates under fatigue. Poisson’s ratio identifies whether early fatigue damage involves delamination. Interactive levels between are quantified. Correlation cumulative acoustic emission energy crack density. Ply-block size stress level effect on accumulation investigated during life laminates. Tension-tension tests different ...

This is the ®rst in a series of two papers generated from a study on net-section-collapse (NSC) analysis of circumferentially cracked pipes. In this paper (part I), a generalized NSC method is presented to predict the maximum moment of a circumferentially cracked pipe with a variable-depth internal surface crack subject to combined bending and tension (pressure-induced) loads. Two sets of equat...

As our title implies, we consider materials failure at the fundamental level of atomic bond breaking and motion. Using computational molecular dynamics, scalable parallel computers and visualization, we are studying the failure of notched solids under tension using in excess of 108 atoms. In rapid brittle fracture, two of the most intriguing features are the roughening of a crack’s surface with...

BACKGROUND Crack-cocaine dependence is a complex disorder with limited treatment options. Topiramate is one of the promising medications with reported reductions in cocaine use and craving in former studies. The present study evaluated the acceptance and effectiveness of topiramate as an add-on to cognitive behavioral therapy (CBT) in crack-cocaine dependent patients. METHODS Seventy-four cra...

A computationally efficient method for discrete modelling of cracks in laminated composite structures using explicit time integration is proposed. Discrete crack involves formation strong discontinuities and the domain elements must be transformed to include this discontinuity. In integration, results a reduction stable increment an analysis corresponding increase computational cost limits its ...