摘要
随着航空技术的发展,普通复合材料的抗冲击性能一直无法符合要求,而泡沫夹芯结构试验件在抗冲击应用中具有不同的耗能机制,显示出更优的比刚度和比强度性能。采用落锤冲击的方式,对碳纤维泡沫夹芯结构试件(材料牌号:W-3021 FF/H60)的抗低速冲击性能进行了研究。利用超声C扫描对冲击破坏区域进行扫描,得到不同冲击能量、不同铺层顺序对碳纤维复合材料泡沫夹芯试件的冲击损伤情况影响。结果表明:夹芯结构损伤深度和损伤面直径会随冲击能量的增加而增加;在相同能量下,夹芯试件的碳纤维布排布层数越多,深度损伤程度越大,损伤面直径越小;在相同冲击条件下,铺层结构中增加了±45°铺层的比例,能够提高夹芯试验件的抗冲击性,非对称铺层会降低试件的抗冲击性。
With development of modern aviation technology,the impact resistance of composite material with single-layer cannot always reach a required level,while foam sandwich structure during test has a different energy dissipation mechanism in application of the impact resistance,indicating a better specific stiffness and a better specific strength performance.Low-velocity impact resistance of carbon fiber composite foam sandwich(material grade:W-3021FF/H60)was investigated by drop hammer impact.Area of impact damage was further scanned using ultrasonic C-scan to obtain effects of impact energies and lay-up sequences on impact damage of the carbon fiber composite foam sandwich specimens.Results show that depth of damage and diameter of damage surface of the sandwich structure increased with increase of impact energy.At the same impact energy,the more layers of carbon fiber cloth,the higher was depth of damage,the smaller was diameter of damage surface.Under the same impact condition,increasing proportion of lay-ups with the degree of±45°could improve impact resistance of the sandwich specimen.Asymmetric lay-ups could reduce impact resistance of carbon fiber foam sandwich structure.
作者
丁一宁
佟刚
杨丽
杨康
王锋
张子傲
DING Yi-ning;TONG Gang;YANG Li;YANG Kang;WANG Feng;ZHANG Zi-ao(College of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110136,China;Manufacturing Inspection Office,Shenyang Aircraft Airworthiness Certification Center of Civil Aviation of China,Shenyang 110043,China;Design Department,Liaoning General Aviation Academy,Shenyang 110136,China)
出处
《沈阳航空航天大学学报》
2021年第6期8-14,共7页
Journal of Shenyang Aerospace University
基金
辽宁省教育厅新型智库项目(项目编号:JYT2020141)
辽宁省教育厅重点攻关及服务地方项目(项目编号:JYT2020156)。
关键词
抗冲击能力
夹芯结构
碳纤维编织布
超声C扫描
低速冲击
铺层方向
impact resistance
sandwich structure
carbon fiber woven cloth
ultrasonic C-scan
low speed impact
lay-up orientation
