Fatigue Analysis of Connecting Rods Based on ABAQUS

Abstract

Abstract:

In order to investigate the dynamic fatigue loads of a connecting rod under engine calibration conditions more fully, the analysis of kinematics and dynamics of the connecting rod was carried out using the rotational inertia method. With the help of the critical plane method, fatigue calculation module was redeveloped based on ABAQUS. The fatigue life was given through finite element analysis of the connecting rod. The whole process was achieved by Python programming language in the ABAQUS software. The developed method herein is able to reflect the connecting rod's fatigue properties more fully by the comparison of numerical results obtained in the engine calibration conditions with the traditional results of the maximum tensile and compressive conditions. It is also shown that the numerical calculation is correct, the redevelopment of the program is feasible. 

Key words: finite element method, fatigue, calibration condition, critical plane method, connecting rod

摘要：

为了全面地考察连杆受到的动态疲劳载荷，在发动机标定工况下，利用转动惯量法对连杆进行了运动学和动力学分析。基于临界平面法，用ABAQUS软件进行二次开发得到了连杆的疲劳计算模块。采用有限元方法分析计算了连杆的疲劳寿命。整个过程是在ABAQUS软件中用Python语言编程来实现的。数值计算结果显示，与传统的最大拉压工况结果相比，在发动机标定工况下得到的计算结果能比较全面地反映连杆的疲劳特性，表明该数值计算方法正确，二次开发程序可行。

关键词: 有限元方法, 疲劳, 标定工况, 临界平面法, 连杆

CLC Number:

TK412.4

TAN Mei-Lan, WU Guo-Yu, LIANG Fu-Xiang. Fatigue Analysis of Connecting Rods Based on ABAQUS[J]. China Mechanical Engineering, 2013, 24(5): 634-638.

谈梅兰, 武国玉, 梁福祥. 基于ABAQUS的连杆疲劳分析[J]. 中国机械工程, 2013, 24(5): 634-638.

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