Abstract Fatigue tests were performed on filled natural rubber (NR) and styrene butadiene rubber (SBR) materials, using die-cut dumbbells. A remarkable evolution of the strain occurs in the narrow section during fatigue even though the displacement amplitude was constant. Additional tests with different test piece geometries are evaluated. The effect of the changing strains depends on both the material and the test piece geometry. A method is introduced to transfer the changing strains into a Wohler curve-compliant constant equivalent strain. Finally, results from finite element simulations are shown to indicate how the method could be applied to other test piece geometries or components.

中文翻译：

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橡胶位移控制疲劳试验不受应变控制

摘要 使用模切哑铃对填充天然橡胶 (NR) 和丁苯橡胶 (SBR) 材料进行疲劳测试。即使位移幅度是恒定的，疲劳期间窄截面中也会发生显着的应变演变。评估具有不同试件几何形状的附加测试。应变变化的影响取决于材料和试件几何形状。引入了一种将变化的应变转换为符合 Wohler 曲线的恒定等效应变的方法。最后，显示了有限元模拟的结果，以表明该方法如何应用于其他试件几何形状或组件。