Damage Analysis of Low-Velocity Impact of Non-Woven Flax Epoxy Composites

ABSTRACT

This paper presents an experimental study of the low-velocity impact behavior and the post-impact residual tensile properties of a non-woven flax epoxy composite. The effect of impact on shape was investigated based on varying impact angle and then correlated to the impact energy. A significant effect of these two parameters on the induced-damage type and shape, the impactor penetration depth and the damaged area were obtained. The composites were subsequently subjected to tensile test it was found that tensile stress and strain decrease with increasing impact energy, especially after 3 J where the material deformation and the local strain are highly influenced.

摘要

本文对亚麻环氧无纺布复合材料的低速冲击性能和冲击后残余拉伸性能进行了试验研究.以不同的冲击角为基础，研究了冲击形状对冲击能量的影响.得到了这两个参数对诱导损伤类型和形状、冲击器穿透深度和损伤面积的显著影响.随后对复合材料进行拉伸试验，发现拉伸应力和应变随着冲击能的增加而减小，尤其是3J后，材料变形和局部应变受到很大影响.

Keywords:

• Natural Fiber Composites (NFC)
• Low velocity impact
• Impact induced damage
• Residual tensile properties

Additional information

Funding

This work was supported by the Mitacs [IT08074]; Natural Sciences and Engineering Research Council of Canada [RGPIN/138039–2012];