The fracture toughness of reinforced polyurethane foam
The fracture toughness of reinforced polyurethane foam
复制标题
增强聚氨酯泡沫的断裂韧性
DOI：
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发表时间：
1978
期刊：
影响因子：
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通讯作者：
J. B. Shortall
中科院分区：
文献类型：
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作者：
T. Cotgreave;J. B. Shortall
将硬质闭孔聚氨酯泡沫中发生的断裂过程的微观研究与断裂力学的韧性评估相结合，以研究短切玻璃纤维的增强能力。纤维增强的一个方面被视为一种机制的延伸，这种机制可能导致基础泡沫具有相对较高的表面能。模量也有所增加，并且纤维拔出对韧性的进一步贡献。尽管未指定，但存在最佳的纤维长度，可以最有效地增强所考虑的泡沫。
A microscopic study of the fracture processes occurring in rigid, closed-cell polyurethane foam has been combined with an assessment of toughness using fracture mechanics in order to investigate the reinforcement capability of chopped glass fibres. One aspect of fibre reinforcement is seen as an extension of a mechanism that could be responsible for the relatively high surface energy of the base foam. There is also an increase in modulus, and a further contribution to toughness is derived from fibre pull-out. An optimum, though unspecified, fibre length exists that gives the most efficient reinforcement of the foam considered.