The flexure modulus test results shows, the flexure modulus of the middle layer group PMMA strengthening material has no obvious difference with the same thickness group (P>0.05);

弹性模量测试结果表明，中间层组的PMMA加强材料的弹性模量与相同厚度的对照组无显著差异（P＞0.05）；

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With the increase in ha content, the flexural strength and flexure modulus of composites had been greatly increased and the tensile strength of composites had only a little change.

随着复合材料中ha含量的增加，材料的弯曲强度、弯曲模量有大幅提高，而材料的抗拉强度即韧性降低不大。

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