金属高周疲劳损伤参数BFGS拟合方法研究

2017 8th IEEE International Conference on Software Engineering and Service Science (ICSESS) Pub Date : 2017-11-01 DOI:10.1109/ICSESS.2017.8342957

Yongjie Zhang, Yanyun Xu, Zheng Yang, Qin Sun

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引用次数: 0

摘要

为了获得更精确的Lemaitre高周疲劳损伤参数，采用最小二乘法对预测寿命与实际寿命的残差进行优化，提出了BFGS准牛顿拟合方法。在金属高周疲劳损伤演化方程中求解损伤参数。以2A12-T4铝合金为例，验证了BFGS准牛顿拟合方法对金属高周疲劳寿命评估的精度和求解效率。

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Study on BFGS fitting method of metal high cycle fatigue damage parameters

In order to obtain more accurate Lemaitre high cycle fatigue damage parameters, a BFGS quasi-Newton fitting method is proposed by optimizing the residual difference between the predicted life and actual life in the least square method. The damage parameters are solved in the damage evolution equation of metal high cycle fatigue. Taking 2A12-T4 aluminum alloy as an example, the precision and solution efficiency of BFGS quasi-Newton fitting method were verified for the evaluation of metal high cycle fatigue life.

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来源期刊

2017 8th IEEE International Conference on Software Engineering and Service Science (ICSESS)

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