Foreign-object damage associated with the ingestion of debris into aircraft turbine engines can lead to a marked degradation in the high-cycle fatigue (HCF) life of turbine components. This degradation is generally considered to be associated with the premature initiation of fatigue cracks at or near the damage sites; this is suspected to be due to, at least in part, the impact-induced residual...

The thermo mechanical reliability of plated through holes (PTH) in printed circuit boards (PCB) normally is determined by different tests (e.g. thermo cycle test (TCT), interconnect stress test (IST), highly accelerated thermal shock (HATS). During these tests the PTH Cu is exposed to stresses and strains which are below the tensile strength and the fracture strain, respectively, which leads to...

OBJECTIVES This study of Japanese dual-earner couples examined the impact of family and job demands on one's own and one's partner's fatigue as well as gender differences in these effects. METHODS A total of 2,502 parents (1,251 couples) were surveyed using a self-administered questionnaire. A crossover model was tested using structural equation modeling. RESULTS The results of structural e...

Warm Mix Asphalt (WMA) is a set of technologies that uses additives to reduce binder viscosity and increase mixture workability, which provides complete coating aggregates at lower temperatures around 100 °C 130 °C. Organic wax or Sasobit one the can be used for this purpose. It reduces melting point wax, allows production asphalt mixes temperatures. This attempt proposes new relationships elas...

The fatigue fracture of structural details subjected to cyclic loads mostly occurs at a critical cross section with stress concentration. The welded joint is particularly dangerous location because of sinergetic harmful effects of stress concentration, tensile residual stresses, deffects, microstructural heterogeneity. Because of these reasons many methods for improving the fatigue resistance o...