temperature stress peak

The internal friction peak shows an anomalous amplitude effect, i.e., at a given temperature of measurement an internal friction peak is obtained when the internal friction is plotted against the stress amplitude.

所得的内耗峰表现有反常的振幅效应，即在一定的观测温度时，如将内耗表示为外加应力的函数，则也得到一个内耗峰。

Hygroscopic stress was generated by the compound ability to absorb moisture and thermal stress was developed during the reflow process with a high peak temperature play an important role in the integrity and reliability of plastic packages.

封装材料由吸湿所引起的湿膨胀以及在回流焊过程中产生的热应力对封装的完整性和可靠性有着重要的影响。

Increasing preheat temperature can decrease the stress peak;

提高预热温度可以降低应力峰值；

Based on gradient-dependent plasticity where an internal length parameter is included to consider the microstructural effect, the distributions of shear deformation, shear strain and temperature in adiabatic shear band were derived considering the slow and sharp decrease of load-carrying capacity beyond the peak shear stress.

采用梯度塑性理论，考虑了峰值剪切应力之后的材料承载能力缓慢降低的过程及承载能力快速降低的过程，推导了剪切带内部的剪切变形、应变及温度分布的公式。