This work presents a comprehensive investigation of the elastic and fracture behavior ply-to-ply angle interlock three-dimensional woven composites. The research investigated novel splitting wedge-driven out-of-plane tests to shed light on tensile in thickness direction provide estimates strength energy. In addition, size effect geometrically-scaled Single Edge Notch Tension (SENT) specimens we...

This paper investigates the phenomenon of slant fracture observed in stable tearing tests of many ductile materials, where an initially flat crack, loaded under remote Mode I conditions, tends to grow into a slant crack and stay in the slant configuration until final fracture. In an effort to identify potential reasons why cracks prefer to grow in a slant manner, three-dimensional finite elemen...

Abstract Characterization of shear behavior in composite materials remains a not fully solved problem. In the last fifty years, many different approaches have been proposed to solve this problem (rail shear, thin-walled tube torsion, off-axis tensile, ±45° Arcan, Iosipescu, asymmetric four-point bend, plate twist, v-notched rail flexural, and frame), although none these achieved an unquestionab...

Purpose: The purpose of this study was to examine weight, diet, and physical activity (PA) changes in youth over summer vacation. Methods: Thirty healthy subjects (19 male, 11 female; mean age + SEM 10.0+0.1 yrs) were assessed before the end of the 2009/2010 school year (baseline), and prior to the start of the 2010/2011 school year (post-test). Results: Significant (p<0.05) increases in height...