Use of CDM in materials modeling and component creep life prediction
Use of CDM in materials modeling and component creep life prediction
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DOI：
10.1115/1.556185
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发表时间：
2000-08-01
影响因子：
1
通讯作者：
Dyson, B
中科院分区：
文献类型：
--
作者：
Dyson, B
基于物理基础的连续蠕变损伤力学（CDM）已经被回顾并表明为预测Larson-Miller参数和罗宾逊寿命分数规则的一些看似不同的方法提供了一个统一的框架--在演化（损伤）中表现出一定的强度，然后可以在适合于试验或使用操作条件的边界条件下将其整合：蠕变的恒定载荷/温度;应力松弛的恒定总应变、可变应力/温度等。蠕变和循环塑性的其他状态变量方法（例如，Bodner、米勒、Chaboche和罗宾逊等人的研究），与CDM的区别主要在于集中在蠕变的初级/次级阶段（或循环加工硬化）和/或通过它们以经验Kachanov方式引入损伤。基于物理的CDM的应用低周疲劳/热疲劳和其潜在的焊接接头的寿命预测进行了讨论。【S0094-9930（00）00903-3】。
Physically based continuum creep damage mechanics (CDM) has been reviewed and shown to provide a unifying framework for some seemingly diverse methods of predicting Larson-Miller parameter, and Robinson's life fraction rule-exhibit certain strengths in evolution (damage) which can then be integrated under boundary conditions appropriate to the test or service operating conditions: constant load/temperature for creep; constant total strain for stress-relaxation, variable stress/temperature, etc. Other state-variable approaches to creep and cyclic plasticity (for example, those due to Bodner, Miller, Chaboche, and Robinson), differ from CDM mainly in concentrating on the primary/secondary stages of creep (or cyclic work-hardening) and/or by their introduction of damage in an empirical Kachanov manner. The application of physically based CDM to LCF/thermal fatigue and its potential for predicting lifetimes of welded joints are also discussed. [S0094-9930(00)00903-3].