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飞艇囊体膜材弹性常数是飞艇结构设计、结构分析的基础.根据正交异性平面应力模型假设,推导了膜材4参数列式,经纬向模量与泊松比.介绍了膜材双向拉伸试验方法、试件设计与加载.以单向反复试验确定膜材经纬向张拉刚度比值,由双向拉伸试验最小二乘法拟合应力应变曲线得耦合弹性模量值,考虑测量数据误差模型,推导出膜材双向拉伸试验解耦弹性常数计算值列式.最后分析得到了系列飞艇囊体膜材弹性常数.本文对飞艇结构设计与研究具有参考价值,试验与分析方法可用于建筑膜材弹性常数测试与计算.
According to the assumption of orthotropic plane stress model, the parameters of 4-parameter array, latitudinal and longitudinal velocities and Poisson’s ratio of membrane were deduced.The bi-directional pull of membrane Tensile test method, specimen design and loading.Using one-way repeated tests to determine the tensile stiffness ratio of the membrane in the latitudinal and longitudinal directions, the elastic modulus of the membrane was fitted by the least square method of biaxial tensile test, the error model , The formula of decoupling elastic constants for the biaxial tensile test of membrane was deduced. Finally, the elastic constants of the membrane of airship were obtained.It has reference value for the design and research of airship structure, and the experimental and analytical methods can be applied to the construction of membrane Material Elastic Constants Test and Calculation.