When temperatures increase, most materials tend to expand, causing a change in material dimensions. When two materials that exhibit different thermal expansion behaviors are in direct contact, such as ...

Managing thermal and mechanical stress in multi-die assemblies will require a detailed knowledge of how and where a device will be used, how it will be packaged, and where stresses could cause ...

In both residential and commercial buildings, heating and cooling cycles can take a toll on piping systems. When pipes expand due to heat and contract when they cool, they stress joints, supports, and ...

A group of researchers led by Helmholtz-Zentrum Berlin (HZB) in Germany and China’s Henan University investigated repeated thermal stress cycles, reflecting diurnal cycles, on the degradation of metal ...

(Structural analyses top the list.) And although most thermal simulations are done with finite elements, there are advantages to methods that work with networks of thermal bodies connected by links ...

When a spatially uniform temperature change is imposed on a solid with more than one phase, or on a polycrystal of a single, non-cubic phase (showing anisotropic expansion–contraction), the resulting ...

Perovskite solar cells are highly efficient and low cost in production. However, they still lack stability over the decades under real weather conditions. An international research collaboration has ...

Thermal management deals with problems arising from heat dissipation, thermal stresses and warping. It is critical in the packaging of power semiconductors and other microelectronic and optoelectronic ...

It’s often said that what we know about concrete is that it gets hard and it cracks. But this is a meaningless over-simplification because it doesn’t tell us anything about either the hardness in ...

In the experiment, perovskite solar cells were repeatedly cooled to minus 150 degrees Celsius and then heated to plus 150 degrees Celsius. The changes in the microstructure of the perovskite layer and ...