摘要
碳纤维复合材料已成功应用于假肢领域产品的开发,然而其对冲击载荷比较敏感,受冲击后其强度将会大幅下降。针对一种新型碳纤维复合材料假脚,开展自由落体冲击试验及冲击后压缩强度试验,分析不同铺层参数、不同冲击吸收能量等因素对其冲击损伤及剩余强度的影响规律。结果表明,对于碳纤维复合材料假脚的U形结构件,不同铺层参数对其冲击损伤影响显著,且随着0°铺层含量的增加,试件的冲击损伤面积越来越小,外观损伤越来越轻;随着冲击吸收能量的增加,碳纤维结构件的冲击损伤面积明显增大,剩余压缩强度逐渐降低。对于碳纤维复合材料假脚结构件,在0~16 J的低能冲击范围内,冲击吸收能量与其剩余压缩强度近似呈线性关系。随着0°铺层含量的增加,碳纤维复合材料结构件的剩余压缩强度逐渐提高。
Carbon fiber composites have been successfully applied in the field of prostheses.However,they are susceptible to the impact loading,which will lead to a significant reduction in the residual strength of composites.Experiment studies on impact damage and residual compressive strength have been done for a newly carbon fiber composites prosthetic foot.The influence of layer parameter and impact energy on the impact damage and residual strength of carbon fiber composites prosthetic foot are analyzed.Results show that,layer parameter has significant influence on the impact damage of U-type component of carbon fiber composites prosthetic foot.With the increasement of 0° layer,the impact damage area gradually reduces,and surface damage becomes smaller.With the higher of impact energy,the impact damage area of U-type component increases and residual compressive strength decreases.On the condition of the impact energy being within 0 J to 16 J,the impact energy and residual compressive strength of U-type component are near linear relationship.The residual compressive strength of U-type component gradually enhances with the increasing 0° layer.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2016年第22期55-60,共6页
Journal of Mechanical Engineering
基金
国家自然科学基金(51305268)
上海工程技术研究中心(15DZ2251700)资助项目
关键词
假脚
碳纤维复合材料
冲击损伤
剩余压缩强度
prosthetic foot
carbon fiber composites
impact damage
residual compressive strength
