The present aim of this paper is to predict the cornering fatigue life of a wheel disc through a preformed bend DP600 steel specimen. To accomplish this objective, a newly designed preformed specimen with a bend radius equivalent to the weakest section of the wheel disc is fabricated by stamping operation followed by load‐controlled high‐cycle fatigue tests. Finite element (FE) simulation of stamping operation shows that an equivalent strain of 13% is induced to the bend specimen. Preformed bend specimen exhibits less fatigue resistance than the prestrained straight specimen for the same equivalent prestrain. A combined state of loading induces multiaxial stress state, giving rise to asymmetry of stresses along the thickness at the bend root of the DP600 steel specimen. Distribution of equivalent plastic strain and stress triaxiality from FE simulation indicates that fatigue crack occurs at the centre of the inner fibre of the bend root.

中文翻译：

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预制弯曲DP600钢试件疲劳响应与轮盘的相关性

本文的当前目的是通过预成型的弯曲DP600钢试样预测轮盘的转弯疲劳寿命。为了达到这个目的，通过冲压操作，然后进行载荷控制的高周疲劳试验，制造出了一种新设计的预制试样，其弯曲半径等于轮盘的最薄弱部分。冲压操作的有限元（FE）模拟表明，弯曲试样的等效应变为13％。对于相同的等效预应变，预成形的弯曲样本比预应变的笔直样本具有更低的抗疲劳性。加载的组合状态会引起多轴应力状态，从而导致沿DP600钢试样弯曲根部厚度方向的应力不对称。