Obtained Stress, displacement variation of oil drill through the analysis of transient dynamics, Point to the occurrence of failure to provide the theoretical basis for simulation.
通过瞬态动力学分析得到钻柱在瞬态冲击下的应力、位移变化规律，为故障的发生点提供理论仿真依据。
Analysis found that the peak strain is linear with the square of peak stress, the inflection point stress, and the convergence point stress is linear with the peak stress.
经过分析发现受腐蚀后混凝土峰值应变与峰值应力的开方，拐点处和收敛点处应力与峰值应力有良好的线性相关性。
It is a very complicated problem to analyze the stress of combined matrix, and the key point related to die life is to do it's precise analysis.
组合凹模的应力分析是一个非常复杂的问题，对其进行精确分析是解决模具寿命的关键。
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