Method for determining shear fatigue test load of stringer and skin combined structure

• Main Authors: ZHU LIANG, ZHANG YANJUN, LEI XIAOXIN
• Format: Patent
• Language: Chinese; English
• Published: 16.07.2021
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention discloses a method for determining a shear fatigue test load of a stringer and skin combined structure, which comprises the following steps of manufacturing a shear fatigue test piece according to design parameters of the stringer and skin combined structure, and calculating a theoretical critical buckling load of the test piece by utilizing an incomplete tension field calculation method, determining the number of shear fatigue tests according to the target life of the stringer and skin combined structure, and according to the skin thickness of the stringer and skin combined structure and the corresponding shear fatigue test times, determining the shear fatigue test load of the test piece by using the relationship between the ratio of the shear fatigue test load to the critical buckling load and the fatigue test target times under different skin thicknesses. 一种长桁与蒙皮组合结构剪切疲劳试验载荷确定方法，根据长桁与蒙皮组合结构设计参数制作剪切疲劳试验件，利用不完全张力场计算方法，计算试验件理论临界屈曲载荷；根据长桁与蒙皮组合结构的目标寿命确定剪切疲劳试验次数；根据长桁与蒙皮组合结构的蒙皮厚度以及对应的剪切疲劳试验次数，利用不同蒙皮