fiber reinforced composites are widely used instead of traditional materials in various technological applications. therefore, by considering the extensive applications of these materials, a proper knowledge of their impact behavior (from low- to high-velocity) as well as their static behavior is necessary. in order to study the effects of strain rates on the behavior of these materials, specia...

background: motorcycle accidents and sport accidents lead yearly to many head injuries like head fractures and concussion. so finding the most proper helmet for reducing the injuries to head can be very helpful for head protection in such cases. methods: after 3d modeling of the helmet and head and meshing the model, a compressive impacting load of 1.31mpa was exerted on head and the model was ...

experiments were carried out to observe the influence of loading type on concrete beam specimens. beam specimens made of similar concrete mixture with the same geometry were tested under three point static loading and low velocity drop weight impact loading. load – displacement behavior, absorbed energy dissipation capacity, stiffnesses, failure modes of beam specimens were obtained and discuss...

impact is one of the most important subjects which always have been considered in mechanical science. nature of impact is such that which makes its control a hard task. therefore it is required to adopt a safe and secure mechanism for transferring the impact to other vulnerable parts of a structure, when it is necessary. one of the best methods of absorbing impact energy is using thin-walled tu...

Previous findings indicated that in-situ chondrocytes die readily following impact loading, but remain essentially unaffected when loaded at the same magnitude but with a slow (non-impact) loading rate. The current study was aimed at identifying the causes for cell death in impact loading by quantifying chondrocyte mechanics when cartilage was compressed nominally by 5% at different loading rat...

BACKGROUND Acute cartilage injuries induce cell death and are associated with an increased incidence of osteoarthritis development later in life. The objective of this study was to investigate the effect of posttraumatic cyclic compressive loading on chondrocyte viability and apoptosis in porcine articular cartilage plugs. HYPOTHESIS Compressive loading of acutely injured cartilage can mainta...

his paper introduces a test methodology to examine the urability of surface mount interconnects under impact oading when a portable electronic product is dropped. onventional testing approaches that consider the agnitude of loading (total impact energy, impact direction, nd number of impacts) as the governing criterion for amage accumulation, typically report difficulties in orrelating with imp...