Mechanical characterization of a two-dimensional Thermal Energy Storage (TES) composite structure that combines the heat storage capability with structural functionality was carried out experimentally. Static and fatigue experiments were conducted for the composite structure under three-point bending at both room temperature and elevated temperature. An energy method model was developed to pred...

Abstract Hot rolling cylinders are the most important machine parts in plastic deformation equipment. They taken out of operation due to breakage caused by predominant action thermal stresses which cause accidental breakdowns mills. In view these aspects, question arose is knowing nature stresses, as well their evaluation. This paper will experimentally determine mechanical and that arise proce...

In this study, the detection and evaluation of defects at Pb-free BGA solder joints (SAC387, 95.5wt%Sn/ 3.8wt%Ag/ 0.7wt%Cu) in Printed Circuit Boards (PCB) placed under different thermal cycle conditions are investigated. By using digital radiography X-ray technique, the soldering defects in the packages including bridges, voids, ball missing, poor wetting, and tilted balls are identified. Subs...

Mechanical fastening or riveting of metallic doublers is traditionally used for repairing cracked structures, multi-site or wide-spread darnage and any other common flaws detected during inspection of aging aircraft. This method of repair can severely reduce the initiation fatigue lifetime and the darnage tolerance of the structure [ 1]. Several researchers for example [2-6] have demonstrated t...

Aluminum reinforced by 60 vol.% diamond particles has been investigated as a potential heat sink material for high power electronics. Diamond (CD) is used as reinforcement contributing its high thermal conductivity (TC 1000 W mK ) and low coefficient thermal expansion (CTE 1 ppm K ). An Al matrix enables shaping and joining of the composite components. Interface bonding is improved by limited c...