Most animal models currently used to study the retention of implants in bone are influenced by shear forces introduced during the retention test. This is mainly due to the implant design, which most often are cylindrical, conical or threaded. In these models interlocking between bone and implant surface will increase the effect of genuine bone bonding and thus give a false positive outcome. The...

Ultra-high molecular weight polyethylene (UHMWPE) woven fabrics have been shown to possess a high strength-to-weight ratio, low density, high-energy absorption, and abrasion-resistant properties. When subjected dynamic impact, the primary failure mode of UHMWPE fabric is yarn pullout, which results from poor inter-yarn friction between weft warp yarns. This work investigates potential use zinc ...

We combine molecular dynamics simulations of deformation at the submicron scale with a simple continuum fracture mechanics model for the onset of crack propagation to calculate the macroscopic fracture energy of amorphous glassy polymers. Key ingredients in this multiscale approach are the elastic properties of polymer crazes and the stress at which craze fibrils fail through chain pullout or s...

Vaporizing foil actuator welding (VFAW), an impact method, was used for the first time to produce high strength welds between SiC-reinforced 8009 aluminum metal matrix composite (MMC) (8009/SiC/11p) and 7075 alloy (AA7075). Microscopic characterization of dissimilar weld revealed multiple heterogenous microstructural zones including unbonded zone at center, a flat interface, wavy trapped jet co...

A series of stress corrosion experiments were performed on 12 pultruded glass fiber composite materials (two fibers in six different matrices) commonly used in high voltage composite insulators. In this study two types of glass fibers were investigated, namely Eglass and ECR-glass. The tests were performed in nitric acid solutions (pH 1.2) using constant K I specimens that were specifically des...