Stochastic Creep Damage Growth due to Random Thermal Fluctuations Using Continuum Damage Mechanics

被引：8
|
作者：
Appalanaidu, Y. [1 ]
Vyas, Yash [1 ]
Gupta, Sayan [1 ]
机构：
[1] Indian Inst Technol, Dept Appl Mech, Madras 600036, Tamil Nadu, India
来源：
6TH INTERNATIONAL CONFERENCE ON CREEP, FATIGUE AND CREEP-FATIGUE INTERACTION | 2013年 / 55卷
关键词：
Continuum damage mechanics; creep; damage growth; stochastic damage; Weiner process; geometric Brownian motion; non-gaussian process; MODEL;
D O I：
10.1016/j.proeng.2013.03.335
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The focus of this study is on the development of a CDM based methodology for estimating the stochastic creep damage growth in structural components subjected to randomly varying thermal loads. Following available frameworks in the literature, the damage growth equations are derived from thermodynamic principles. The fluctuations are first modeled as Gaussian white noise processes. However this leads to physically unrealizable negative damage growth. Alternative non-Gaussian models for the noise, such as the geometric Brownian motion, have been subsequently used to study the growth of creep damage. Numerical results have been presented to illustrate the developments. (C) 2013 The Authors. Published by Elsevier Ltd.
引用
收藏
页码：805 / 811
页数：7
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