| 裂纹扩展寿命计算方法 |
| |
| 引用本文： | 牛庠均. 裂纹扩展寿命计算方法[J]. 北京工业大学学报, 1991, 17(2): 26-30. |
| |
| 作者姓名： | 牛庠均 |
| |
| 作者单位： | 北京工业大学土木工程学系 |
| |
| 摘 要： | 利用可动边界的变分理论与方法,求得了裂纹扩展时能量泛函的二阶变分,由二阶变分为零的条件求得裂纹扩展的临界状态和临界速度,并根据临界速度推演出裂纹扩展的寿命计算公式。寿命计算公式适用于固体系统的各种状态。(如弹性体,非线性弹性体,塑性状态,蠕变状态),具有重要的理论意义与实用价值。
|
| 关 键 词： | 裂纹扩展 可动边界变分问题 临界条件 |
| 收稿时间： | 1990-12-05 |
Life Prediction Methodology for the Crack Extension |
| |
| Niu Xiangjun. Life Prediction Methodology for the Crack Extension[J]. Journal of Beijing University of Technology, 1991, 17(2): 26-30. |
| |
| Authors: | Niu Xiangjun |
| |
| Affiliation: | Department of Civil Engineering |
| |
| Abstract: | |Based on the theory and method for variational problems of variable boundary, the second variation of the energy functional for crack extension is obtained. If the second variation vanishes. the critical condition and the critical velocity for crack extension are got. Then the formula of life prediction can be applied to various conditions of solid system, such as elasticity, nonlinear elasticity, elasto-plasticity and creep condition, which is of great importance theoretically adn of great value practically. |
| |
| Keywords: | crack extension variational problem of variable boundary coiticak condition |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《北京工业大学学报》浏览原始摘要信息 |
|
点击此处可从《北京工业大学学报》下载全文 |
|
