Low protein intake is associated with an alteration of bone microstructure and material level properties. However, it remains unknown whether these alterations of bone tissue could influence the response to repeated mechanical loading. The authors investigated the in vitro effect of repeated loading on bone strength in humeri collected from 20 6-month-old female rats pair-fed with a control (15...

loading conditions and complex geometry have led the cylinder heads to become the most challenging parts of diesel engines. one of the most important durability problems in diesel engines is due to the cracks valves bridge area. the purpose of this study is a thermo-mechanical analysis of cylinder heads of diesel engines using a two-layer viscoplasticity model. in this article, mechanical prope...

Low-cycle fatigue is the ability of a material or structure to resist cyclic loads in range 0–105 cycles. are sometimes referred as repeated. Little work has been devoted low-cycle polymer composite materials (PCM). Studies were carried out by A.I. Chebanenko, B.A. Bondarev, Bondareva A.B. Besides them, works Chernousov R.N., Nemtsev V.A., Biryukov K.S. known. Much more publications and researc...

The article presents the results of experiments on cyclic loading samples with an annular V-shaped notch and their mathematical modeling. tests were carried out specimens BrKh08-Sh alloy a change in tensile load from 0 to given value. Under such loading, material groove area is subjected elastoplastic deformation, which leads failure due low-cycle fatigue. When testing using digital image corre...

A team of materials scientists is supporting the development of Networked Implantable Neuroprostheses (NNPS) Systems on an NIHBioengineering Research Partnership. The Materials Group is leading the material and structural evaluation, analysis, and testing of implantable electrodes and interconnects that form part of the NNPS. Currently the potential use of silver cored Drawn Filled Tube (DFT) c...

Epidemiologic studies indicate that repetitive (cyclic) occupational activities lead to a cumulative trauma disorder (CTD), and the frequency or velocity of the movement is one of the risk factors. Experimental neurophysiological evidence to confirm the epidemiology is not available. The response of the multifidus muscles to cyclic loading in anterior lumbar flexion-extension was assessed to te...

Skeletal responses to damage are significant for understanding the etiology of stress fractures and possibly osteoporotic fractures. We refined the rat forelimb-loading model to produce a range of sub-fracture damage levels during in vivo cyclic loading. A total of 98 right forelimbs of anesthetized, male, 5-month old Fischer rats were loaded cyclically (2 Hz) in axial compression. Rats were ki...