【摘要】 为了研究飞艇中焊接带结构的材料属性及该结构对蒙皮强度的影响,基于飞艇制作的工程经验和结构的应力分析结果,借助数字图像相关技术,设计了焊接带的单轴拉伸、单轴循环和双轴拉伸的试验试件和试验方案。实验结果表明,和蒙皮相比,焊接带结构的强度相对较大,发生断裂的位置是二者相接处的蒙皮。焊接带结构的存在导致蒙皮强度比原来有所降低,单轴拉伸时强度降低12%左右,双轴拉伸时,拉伸比例为2∶1条件下强度减弱最多,降低36%左右。研究内容能在一定程度上为飞艇整体结构的强度预报提供实验支撑。更多还原

【Abstract】 In order to investigate the material properties of the welded structure in the airship and the effect of the welded structure on the membrane strength,the test specimens and schemes were designed for uniaxial tensile test,uniaxial cyclic test,and biaxial tensile test according to the airship engineering experience and structural stress distribution. The method of digital image correlation was adopted in the experiment. The test results show that the strength of welded structure is more than membrane and the fracture location is the membrane where the two materials meet. The strength of membrane with welded structure is smaller than the membrane itself,which is reduced by about 12% under uniaxial tensile condition and reduced by about 36% under biaxial tensile condition with ratio 2 ∶1. This paper can provide experimental support for the strength prediction of the airship structure.更多还原