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首页> 外文期刊>Polymer Composites >Toughening mechanisms in rubber-modified glass fiber/unsaturated polyester composites
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Toughening mechanisms in rubber-modified glass fiber/unsaturated polyester composites

机译：橡胶改性玻璃纤维/不饱和聚酯复合材料的增韧机理

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摘要

An important case of composite failure is the leakage of pipes and pressure vessels subjected to internal pressure. The primary damage mechanism leading to leakage is transverse cracking parallel to the fibers. Effects of matrix toughening on transverse cracking strains were therefore investigated for GF/UP cross-ply laminates with matrices of different liquid rubber content. The strain to the first transverse crack was increased from 0.2-0.6% with 10 wt.% rubber. Debonding occurred at similar stains in GF/UP and GF/UP-rubber. However, whereas debonding was almost simulateous with transverse cracking in GF/UP, gradual growth of debonds to short cracks took place initially in GF/UP-rubber. This was followed by slow extension of short cracks to a critical flaw size corresponding to unstable growth.
机译：复合材料失效的一个重要案例是受到内部压力的管道和压力容器的泄漏。导致泄漏的主要破坏机理是平行于纤维的横向裂纹。因此，对于具有不同液态橡胶含量的基质的GF / UP交叉层压板，研究了基体增韧对横向开裂应变的影响。用10重量％的橡胶，对第一横向裂纹的应变从0.2-0.6％增加。在GF / UP和GF / UP橡胶中​​类似的污渍处发生脱胶。然而，尽管在GF / UP橡胶中​​剥离几乎与横向裂纹相似，但最初在GF / UP橡胶中​​剥离逐渐发展为短裂纹。随后，短裂纹缓慢扩展至与不稳定生长相对应的临界缺陷尺寸。

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