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Ultrasonic Fatigue Testing in the Tension-Compression Mode
Published on: March 7, 2018
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作为通过分析认证的子案例,SAE钥匙孔样本的疲劳寿命预测
Xijia Wu1, Zhong Zhang1, Dany Paraschivoiu1
1Aerospace Research Center, National Research Council Canada, 1200 Montreal Rd., Ottawa, ON K1A 0R6, Canada.
Materials (Basel, Switzerland)
|September 28, 2024
概括
本研究通过分析SAE钥匙孔样本来证明航空航天疲劳的分析认证 (CbA). 对裂核和生长的分析预测与实验结果进行了验证,这标志着疲劳分析的重大进步.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 航空航天工程 航空航天工程
背景情况:
- 航空航天行业需要先进的通过分析认证 (CbA) 技术.
- 对关键部件的疲劳分析对于结构完整性和安全性至关重要.
- SAE钥匙孔样本是评估材料疲劳行为的标准测试样本.
研究的目的:
- 用SAE钥匙孔样本来证明疲劳问题的分析认证 (CbA) 的一个子案例.
- 在不依赖于广泛的实验性疲劳数据回归的情况下,分析预测疲劳裂核和生长.
- 根据实验测试结果验证分析疲劳寿命预测.
主要方法:
- 进行了现象识别和排名表 (PIRT) 分析.
- 使用有限元法 (FEM) 来建模弹性/弹性压力分布.
- 修改的纽伯规则,拉姆伯格-奥斯古德方程,修改的田中-穆拉 (TMW) 模型和姆金斯方程被用于分析预测.
主要成果:
- 使用FEM.精确地获得了弹性/弹性应力分布.
- 低循环疲劳 (LCF) 裂核化寿命是使用具有材料特性的TMW模型预测的.
- 使用姆金斯方程模拟了塑料裂的生长.
- 分析预测与SAE钥匙孔样本测试成功验证.
结论:
- 本研究介绍了第一个成功的疲劳通过分析认证 (CbA) 在子元素层面.
- 开发的分析方法为疲劳寿命预测提供了一条途径,而不需要大量的经验数据.
- 这些发现推动了CbA技术的发展,这对航空航天工业的未来至关重要.
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