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为研究温度及应变速率下刨链的强度和寿命特征,以变形条件对圆环链临界损伤因子的影响为主要研究目标,确立物理试验与数值模拟仿真相互佐证寻求临界损伤因子的基本思路。进行不同温度和应变速率条件下多组试样的热物理模拟拉伸试验,利用采集到的参数完成试验的仿真再现。结果发现最大损伤值总是出现在圆环链的肩部,损伤软化现象对应变速率较为敏感,临界损伤因子不是一个常数,而在0.15～0.54。
In order to study the strength and life characteristics of planing chains under temperature and strain rate, taking the influence of deformation conditions on the critical damage factors of circular chains as the main research goal, the basic idea of seeking mutual critical damage factors by physical experiment and numerical simulation is established. Under different temperature and strain rate conditions, the thermophysical simulation tensile test of several groups of samples was carried out, and the simulated parameters were used to complete the simulation. The results show that the maximum damage value always appears on the shoulder of the circular chain. The damage softening phenomenon is more sensitive to the strain rate. The critical damage factor is not a constant, but is between 0.15 and 0.54.