Comparing with the uniaxial compression, the Young's modulus and the yield stress of the biaxial compression increase obviously.

与单轴压缩相比较，双轴压缩的弹性模量和屈服应力有明显的提高。

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The result reveals that the biaxial oriented PEX pipe can increase the tensile strength by 32.29% at most, while the modulus of elasticity increasing 13.06% and the elongation at break reducing 5.88%.

通过测试环向拉伸强度，双向自增强PEX管材的拉伸强度最高可达到32.29%，弹性模量最大可提高13.06%，断裂伸长率平均减小5.88%。

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