Damage Mechanics Considerations for Life Extension of High-Temperature Components
Damage Mechanics Considerations for Life Extension of High-Temperature Components
复制标题
DOI：
10.1115/1.556167
复制
发表时间：
2000-05
影响因子：
1
通讯作者：
X. Ling;S. Tu;J. Gong
中科院分区：
文献类型：
--
作者：
X. Ling;S. Tu;J. Gong
连续损伤理论已被证明是蠕变损伤模拟的有效工具。为了建立部件在高温下延长寿命的一些力学原理，引入了基于局部蠕变损伤理论的数值方案。为了说明结构延长寿命的强度潜力，该方法首先应用于两杆结构的简单情况。然后分析几何不连续性、材料不连续性和温度不均匀性的典型组成部分。根据部件的损伤分布或寿命耗尽，提出了一些延长寿命的原则。@S0094-9930~00！00202-X#
Continuum damage theory has proven to be an effective tool in creep damage simulation. In order to establish some mechanical principles for life extension of components at elevated temperature, a numerical scheme based on the localized creep damage theory is introduced. To illustrate the strength potential of structures for life extension, the method is first applied to a simple case of two-bar structure. Typical components of geometrical discontinuity, material discontinuity, and temperature inhomogenity are then analyzed. In terms of the damage distribution or life exhaustion of the components, some principles for life extension are proposed.@S0094-9930~00!00202-X#