Residual flexural strength after low-velocity impact in glass/polyester composite beams
Residual flexural strength after low-velocity impact in glass/polyester composite beams
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DOI：
10.1016/j.compstruct.2009.06.007
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发表时间：
2010
影响因子：
6.3
通讯作者：
C. Santiuste;S. Sanchez-Saez;E. Barbero
中科院分区：
文献类型：
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作者：
C. Santiuste;S. Sanchez-Saez;E. Barbero
这项工作的重点是玻璃/聚酯复合梁冲击后弯曲行为的实验研究。评估了冲击能量、梁宽度和冲击器鼻部几何形状对残余弯曲强度的影响。选择两种宽度的平纹编织层压板样品。对于每个样本宽度，选择两个冲击头（夏比冲击头和半球形）的几何形状来使用三点弯曲装置进行冲击测试，从而执行四种不同的测试配置。通过准静态三点弯曲试验评估损坏样本的残余弯曲强度，发现取决于损坏的程度，因此损坏到达梁边缘的样本的残余弯曲强度较低。因此，用夏比鼻冲击器冲击的试样的残余强度低于用半球头冲击器冲击的试样的残余强度。类似地，较窄的样本比较宽的样本表现出较低的残余弯曲强度。
This work focuses on an experimental study of flexural after impact behaviour of glass/polyester composite beams. The influence of impact energy, beam width, and impactor-nose geometry on the residual flexural strength was evaluated. Two widths of plain woven laminate specimens were selected. For each specimen width, the geometries of two impactor-noses (Charpy and hemispherical) were chosen to carry out impact tests using a three-point bending device, so that four different test configurations were executed. The residual flexural strength of damaged specimens, evaluated by quasi-static three-point bending tests, was found to depend on the extent of the damage, so that the residual flexural strength was lower in the specimens in which the damage reached the edges of the beam. For this reason, the residual strength was lower in specimens impacted with a Charpy-nose impactor than in the specimens impacted with a hemispherical-nose impactor. Analogously, the narrower specimens presented a lower residual flexural strength than did the wider ones.