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鉴于大型波纹管膨胀节全尺寸疲劳寿命试验在工程上实现的困难性，研究了基于局部应力－应变法预测大型波纹管的疲劳寿命。应用非线性有限元获取波纹管的最大局部应力应变，并据此局部应变设计简化的试板。当弯曲试板上的最大应变等于波纹管的最大局部应变时，板的弯曲疲劳试验寿命即可代替波纹管的试验寿命。本方法在工程设计中被证明是实用且可靠的，它也适用于低压工况下通用尺寸波纹管的疲劳寿命的预测。
In view of the difficulty in engineering of full-scale fatigue life test of large-scale bellows expansion joint, the fatigue life of large-scale corrugated pipe based on local stress-strain method is studied. Nonlinear finite element method was used to obtain the maximum local stress and strain of the bellows, and a simplified test plate was designed based on the local strain. When the maximum strain on the flexural test plate is equal to the maximum local strain of the bellows, the bending fatigue test life of the plate can replace the test life of the bellows. This method has proven to be practical and reliable in engineering design and is also suitable for the prediction of the fatigue life of common size bellows under low pressure conditions.