COMPRESSIVE BEHAVIOR OF EPOXY SYNTACTIC FOAM
COMPRESSIVE BEHAVIOR OF EPOXY SYNTACTIC FOAM
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发表时间：
2005
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通讯作者：
Lu Zixing;Shi Shanglu
中科院分区：
文献类型：
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作者：
Lu Zixing;Shi Shanglu
通过准静态压缩试验，研究了空心玻璃微珠增强环氧复合泡沫塑料的压缩力学性能。根据复合材料力学的结果，提出了复合泡沫塑料弹性模量和屈服强度的预测公式。此外，通过对复合泡沫塑料试样的宏观和微观观察，探讨了复合泡沫塑料的破坏机理。结果表明，复合泡沫塑料在压缩过程中的变形特性与普通泡沫塑料非常相似。当应变达到2%左右时，复合泡沫材料屈服，当应变大于30%时，复合泡沫材料塌陷。复合泡沫塑料的杨氏模量和屈服强度随着材料密度的降低而降低，公式预测结果与实验数据基本吻合。对试件的宏观和微观观察表明，其主要破坏形式为剪切弹塑性破坏。
The compressive mechanical properties of epoxy syntactic foam reinforced with hollow glass micro-spheres are studied by quasi-static compression tests. Some predicting formulae of Young's modulus and yield strength of syntactic foam are proposed based on the results of composite mechanics. In addition, the failure mechanism of syntactic foam is investigated by macroscopic and microscopic observation of fractured specimens. The results show that the deformation characteristics of syntactic foams are very similar to those of plain foams during compression. The syntactic foam is yielded when the strain reaches about 2% and it is collapsed when the strain is larger than 30%. Furthermore, the Young's modulus and yield strength of syntactic foam are decreased with the decrease of density of material, and the predicted results of formulae are basically in agreement with the experimental data. The macroscopic and microscopic observation of fractured specimens indicates that the main failure mode is elasto-plastic collapse caused by shear.