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| Abstract: |
| [ST5"BZ]Fatigue fracture of materials and structures is one of the most common failure modes in engineering applications. Under multiaxial non-proportional loading condition, a large number of materials show non-proportional hardening characteristics, which results in a significant reduction of fatigue life. In this paper, a review on energy methods for multiaxial fatigue life prediction has been carried out. The energy methods are divided into three categories: energy based models without considering the loading path effect, energy based models combined with the critical plane method, and energy based models considering the loading path effect. Among these categories, energy based models considering the loading path effect are introduced in detail since they involve the non-proportional hardening effect in multiaxial fatigue. |
| Key words: multiaxial fatigue, life prediction, plastic work, non-proportional factor |
| DOI：10.11916/j.issn.1005-9113.19095 |
| Clc Number:O346.2 |
| Fund: |
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| Descriptions in Chinese: |
| 综述:多轴疲劳寿命预测中的能量法 仲政1，芦迎亚2 （1.哈尔滨工业大学(深圳) 理学院，广东 深圳518055；2.联合汽车电子有限公司，上海201206） 摘要：材料和结构的疲劳断裂是工程应用中最常见的失效模式之一。多轴非比例加载下，大量材料表现出非比例强化效应，疲劳寿命大大减少。本文综述了多轴疲劳寿命预测中的能量方法，能量方法被分为三类：不考虑路径效应的能量方法、与临界面法相结合的能量方法、考虑路径效应的能量方法。在三类方法中，本文着重介绍了考虑路径效应的能量方法，因为该方法能够反映多轴疲劳问题中的非比例强化效应。 关键词：多轴疲劳，寿命预测，塑性功，非比例因子 |
