A NEW DAMAGE MECHANICS BASED APPROACH TO FATIGUE LIFE PREDICTION AND ITS ENGINEERING APPLICATION

作者：Shen Fei; Hu Weiping^*; Meng Qingchun; Zhang Miao

来源：Acta Mechanica Solida Sinica, 2015, 28(5): 510-520.

DOI：10.1016/s0894-9166(15)30046-x

• fatigue damage model
• damage mechanics
• fatigue life
• finite element method

An approach based on continuum damage mechanics to fatigue life prediction for structures is proposed. A new fatigue damage evolution equation is developed, in which the parameters are obtained in a simple way with reference to the experimental results of fatigue tests on standard specimens. With the utilization of APDL language on the ANSYS platform, a finite element implementation is presented to perform coupling operation on damage evolution of material and stress redistribution. The fatigue lives of some notched specimens and a Pitch-change-link are predicted by using the above approach. The calculated results are validated with experimental data.

• 出版日期2015-10
• 单位中国空间技术研究院; 北京航空航天大学