主办：陕西省汽车工程学会
ISSN 1671-7988  CN 61-1394/TH
创刊：1976年
汽车实用技术

汽车实用技术 ›› 2022, Vol. 47 ›› Issue (8): 125-130.DOI: 10.16638/j.cnki.1671-7988.2022.008.025

• 测试试验 • 上一篇    

铝合金材料 A356 疲劳寿命试验研究优化 CAE 有限元分析

杨 雷，李自平，向用均，杨钧浩，高 为   

  1. 四川建安工业有限责任公司
  • 出版日期:2022-04-30 发布日期:2022-04-30
  • 通讯作者: 杨 雷
  • 作者简介:杨雷（1986—），男，工程师，研究方向为汽车底盘台架试验，E-mail:27060401@qq.com。

Optimization of CAE Finite Element Analysis on Fatigue Life Test of Aluminum Alloy A356

YANG Lei, LI Ziping, XIANG Yongjun, YANG Junhao, GAO Wei   

  1. Sichuan Jian'an Industry Company Limited
  • Online:2022-04-30 Published:2022-04-30
  • Contact: Sichuan Jian'an Industry Company Limited

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摘要： 产品开发前期的 CAE 有限元可靠性寿命分析，只用软件固有的材料性能参数，不能得 到较准确的分析结果。因为相同材料的不同热处理等加工工艺，其应力-寿命曲线数据会有很 大的差异。文章主要研究如何对特定加工工艺材料的不同结构产品进行置信度较高的有限元 疲劳寿命分析。首先对特定材料的多根棒材静态拉伸后进行一定比例的不同载荷下的多项疲 劳试验。再将试验后的数据进行威布尔分布统计分析得到该特定材料的应力-寿命曲线数据， 并将其用于 CAE 分析软件数据库的数据优化。进而用优化后的 CAE 分析软件对某种结构件 的分析结果与该结构件实际台架试验结果进行比对验证。两种结果的误差范围在可接受的范 围内时，数据库优化后的 CAE 分析软件就可以在产品开发前期对该特定材料的不同结构产 品、不同受力试验项目进行置信度较高的疲劳寿命分析。

关键词: 可靠性；有限元疲劳寿命分析；威布尔分析；应力-寿命曲线；台架试验

Abstract: In the CAE finite element reliability life analysis in the early stage of product development, only the inherent material performance parameters of the software can not get more accurate analysis results. Because of different heat treatment and other processing processes of the same material, the stress life curve data will be very different. This paper mainly studies how to carry out finite element fatigue life analysis with high confidence for different structural products of materials with specific processing technology. Firstly, after static tension of several bars of specific materials, a number of fatigue tests under different loads in a certain proportion are carried out. Then the stress life curve data of the specific material is obtained after the statistical analysis of Weibull distribution, and it is used to optimize the data of CAE analysis software database. Then the optimized CAE analysis software is used to compare and verify the analysis results of a structural member with the actual bench test results of the structural member. When the error range of the two results is within the acceptable range, the CAE analysis software after database optimization can carry out high confidence fatigue life analysis for different structural products and different stress test items of the specific material in the early stage of product development.

Key words: Reliability; Finite element fatigue life analysis; Weibull analysis; Stress life curve; Bench test