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首页> 外文期刊>International Journal of Microstructure and Materials Properties >Identification and validation of a continuum damage model applied for the lifetime prediction of H11 tool steel
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Identification and validation of a continuum damage model applied for the lifetime prediction of H11 tool steel

机译：鉴定和验证用于H11工具钢寿命的连续损伤模型

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摘要

This paper describes the work performed to identify and validate a non-isothermal continuum damage model for a widely used hot-work tool steel H11 at a hardness of 47 HRc. The investigation is based on an extensive high-temperature low-cycle fatigue database performed under strain rate controlled tests with and without dwell times in the range of 300℃-600℃. The approach gives a good description of the thermomechanical behaviour of H11 tool steel under various test conditions and constitutes a very good prediction tool for a very large amount of fatigue tests. This work is divided into three stages. First, isothermal fatigue tests are performed on flat specimens in order to identify lifetime model parameters. Then, thermo mechanical fatigue tests are considered in order to validate the model in a non-isothermal case. Lastly, low-cycle fatigue tests are carried out on notched specimens in order to investigate the model capabilities in a multiaxial condition.
机译：本文介绍了为识别和验证硬度为47 HRc的广泛使用的热作工具钢H11的非等温连续介质损伤模型而进行的工作。该研究基于一个广泛的高温低周疲劳数据库，该数据库是在应变速率受控的测试下执行的，在300℃-600℃的范围内有无停留时间。该方法很好地描述了H11工具钢在各种测试条件下的热力学行为，并为大量疲劳测试提供了很好的预测工具。这项工作分为三个阶段。首先，对扁平样品进行等温疲劳测试，以识别寿命模型参数。然后，考虑进行热机械疲劳测试，以在非等温情况下验证模型。最后，对带缺口的试样进行低周疲劳试验，以研究多轴条件下的模型性能。

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