汽车发动机曲轴疲劳试验方法:曲轴是汽车发动机的重要部件，无论是在产品开发阶段还是在生产检验阶段，都要求对曲轴的疲惫性能进行检验。在发动机实际运行过程中，曲轴所承受的载荷主要是弯曲／扭转复合载荷，弯曲疲劳破坏是曲轴失效的最常见形式，而在发动机输出功率较大、曲轴承受扭矩较大的情况下，扭转疲劳破坏则成为主要失效形式。

Fatigue test method for crankshaft of automobile engine: crankshaft is an important part of automobile engine. It is required to test crankshaft fatigue performance in both product development stage and production inspection stage. In the actual operation of the engine, the crankshaft bearing load is mainly bending / torsion of composite load, bending fatigue failure is the most common form of failure of the crankshaft, and the larger, the output power of the engine crankshaft bearing of big torque, torsional fatigue failure is the main failure form of.