This paper examines the blood chamber of a left ventricular assist device (LVAD) under static loading conditions and standard operating temperatures. The LVAD’s walls are made of a temperature-sensitive polymer (ChronoFlex C 55D) and are covered with a titanium nitride (TiN) nano-coating (deposited by laser ablation) to improve their haemocompatibility. A loss of cohesion may be observed near t...

High Static Low Dynamic Stiffness (HSLDS) mounts consist of nonlinear springs that support a high static load with low static displacement, whilst maintaining locally low stiffness near equilibrium, to give a low natural frequency and consequently good isolation properties. Recent analysis has investigated such devices when the force-displacement relationship is an odd function about the equili...

Static bending-induced solder joints damage is a main reliability concern for aerospace and military industries whose Printed Circuit Board Assemblies (PCBAs) are required to remain functional under flexural loading. In order dissipate heat in an equipment, it common install thermal gap pads on electronic packages. When compressing during the fixture process, PCBA can bend therefore crack if de...

This study investigates the response of pre-stressed anchored excavation walls under dynamic and pseudo-static loadings. A finite difference numerical model was developed using FLAC2D, results were successfully validated against full-scale experimental data. Analyses performed on 10, 20-m-height stabilized excavated slopes with 60° to 90° inclination angle horizon represent an applicable variet...

Composite tubular structures have shown promise as energy absorbers in the automobile industry. This paper investigates absorption characteristics of carbon fiber reinforced plastic (CFRP) tubes with pre-existing holes. Holes may represent an extreme case impact damage that perforates tube, e.g., stones from road surface impacting tubes. Tubes holes more conservative performance characteristics...

This study intends to examine the behavior of a GRS wall with static footing loading above it, while varying positions footing. For such complex structure, finite element modeling is handy and enables look into various stress/strain developed in numerical model. In view above, series (FEM) simulations using software (Optum G2) performed for analysis wall. The governing parameters, as width (B),...