^^ A theory of acou.tlc fatlgu« !• propo««l which U b«.«d on a gene»! theory of fatigue of metal.. The theory 1« bated on the propo.ltlon that the problea la better under.tood If attention it focuted on the growth of the crack which it re.pon.lble for the ultimate failure. One .Ignificant manner in which the pre.ent theory differ. fromother. 1. that it invoke, a .tree, dependent limiting condit...

Fatigue is a serious issue for the rail industry, increasing inefficiency and accident risk. The performance of 20 train drivers in a rail simulator was investigated at low, moderate and high fatigue levels. Psychomotor vigilance (PVT), self-rated performance and subjective alertness were also assessed. Alertness, PVT reaction times, extreme speed violations (>25% above the limit) and penalty b...

To design against premature mechanical failure, most implant devices such as coronary and endovascular stents are assessed on the basis of survival, i.e., if a fatigue life of 10(8) cycles is required, testing is performed to ascertain whether the device will survive 10(8) cycles under accelerated in vitro loading conditions. This is a far from satisfactory approach as the safety factors, which...

Title of Document: DEVELOPMENT OF FATIGUE MODELS FOR COPPER TRACES ON PRINTED WIRING ASSEMBLIES UNDER QUASI-STATIC CYCLIC MECHANICAL BENDING. Daniel M Farley, Doctor of Philosophy, 2010 Directed By: Professor Abhijit Dasgupta Department of Mechanical Engineering This dissertation investigates the fatigue durability of copper (Cu) traces on printed wiring assemblies (PWAs) under quasi-static cyc...