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首页> 外文期刊>International Journal of Heat and Mass Transfer >Predictive model of dynamic thermal contact resistance adapted to the workpiece―die interface during hot forging process
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Predictive model of dynamic thermal contact resistance adapted to the workpiece―die interface during hot forging process

机译：热锻过程中适应工件-模具界面的动态热接触电阻预测模型

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摘要

We propose a model of dynamic thermal contact resistance. This model is intended to be implanted in numerical codes of thermomechanics with as first application: the workpiece―die interface during a hot forging process All the interfacial parameters are temporal functions. The real rate of contact is represented by the ratio local normal stress on flow stress of the workpiece corresponding to the contact temperature. The principle of the model suggested consists to connect the real rate of contact to the density of contact spot and to the average interstitial thickness. These parameters are functions which are established from a surface analysis processing of the workpiece and die before the forging operation. Calculated at each step of time, the real rate of contact gives access thus to the other parameters and thus to the instantaneous thermal resistance of contact.
机译：我们提出了动态热接触电阻模型。该模型旨在首次应用到热力学数字代码中：在热锻过程中的工件-模具界面所有界面参数都是时间函数。实际接触速率由对应于接触温度的局部法向应力与工件流动应力之比表示。建议的模型原理包括将实际的接触速率与接触点的密度以及平均间隙厚度联系起来。这些参数是在锻造操作之前通过对工件和模具进行表面分析处理而建立的功能。通过在每个时间步长上计算，实际的接触率可以访问其他参数，从而可以接触到瞬时热阻。

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