The former reports provided considerable information aboutudfoam and continuum rubbers under three types of tensile loading (i.e. uniaxial, strip-biaxial and homogeneous-biaxial tension). ududSince continuum rubbers are almost incompressible it isudextremely difficult to determine the strain energy function beyond the linear term. On the other hand the highly dilatable foam rubber enables one to determine the functional form of the strain energy valid up to higher order terms. Special attention is being paid to foam rubber, since it represents .the limiting case of completelyuddewetted propellant.ududThe present report will (i) furnish the method of determination of strain energy function and the associated constitutive stress-strain law for large deformations out to fracture and (ii) present the triaxial tensile test data needed to double check item (i).
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机译：以前的报告提供了有关在三种类型的拉伸载荷（即单轴，条带-双轴和均质-双轴张力）下的 ud泡棉和连续橡胶的大量信息。 ud ud 因为连续橡胶几乎不可压缩，所以很难确定超出线性项的应变能函数。另一方面，高度可膨胀的泡沫橡胶使人们能够确定应变能的有效形式，直至较高阶项为止。正在特别注意泡沫橡胶，因为它代表了完全未润湿的推进剂的极限情况。 ud ud本报告将（i）提供确定应变能函数的方法以及与之相关的本构应力-应变定律。大变形导致断裂，并且（ii）提供了再次检查项目（i）所需的三轴拉伸试验数据。
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