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Light Emitting Diode (LED) luminaires and lamps are energy-saving and environmental friendly alternatives to traditional lighting products. However, current luminous flux depreciation test at luminaire and lamp level requires a minimum of 6000 h testing, which is even longer than the product development cycle time. This paper develops an accelerated test(More)
During the encapsulation of electronic components stresses are generated due to curing effects and the difference in thermal shrinkage between molding compound and die. These residual stresses add up to the stresses generated during thermal cycling and mechanical loading and may eventually lead to product failure. In this paper we focus on three commercial(More)
During the packaging of electronic components stresses are generated due to curing effects and the difference in thermal shrinkage between molding compound and die. For a reliable simulation of the stresses generated in a package during cure and subsequent cooling it is essential to have accurate data for the thermal and mechanical properties of the molding(More)
Currently, the rotary compressors are widely employed in residential air conditioners. Less oil technique is one of the most important directions of rotary compressor development. This less oil technique research is based on R290 rolling piston rotary compressor for the purpose of decreasing R290 charge amount in room air conditioner to satisfy the demand(More)
In micromechanical models for glass fibre reinforced polymer (GFRP) composite fatigue, fibre fatigue behavior can be a key input variable since fibres are the main constituents to bear applied loads on composites. In the description of fatigue behavior, the fibre S-N curve can be obtained by a reverse-engineering technique by matching a composite S-N curve(More)
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