Influence of Fiber Volume and Alignment on Impact Resistance of Braided Carbon Fiber Epoxy Composites

Miller, Sandi G ; Roberts, Gary D ; Heimann, Paula J ; McCorkle, Linda S ; Martin, Richard E ; Pereira, J Michael ; Goldberg, Robert K

关键词: CARBON FIBERS;    BRAIDED COMPOSITES;    IMPACT RESISTANCE;    FIBER COMPOSITES;    EPOXY RESINS;   

RP-ID  :  NASA/TM-2018-219881,E-19504,GRC-E-DAA-TN53689

学科分类：复合材料

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

The effect of axial tow alignment within a laminate ply stack on the impact penetration threshold for a series of composite panels was evaluated; specifically, the effect of a lateral shift in alignment to induce fiber nesting. Panels were fabricated from braided T700S carbon fiber and TenCate Advanced Composites's TC275-1 epoxy resin prepreg. Axial tows in each ply were aligned, offset, or rotated to evaluate the influence of such parameters on impact penetration resistance. Panel-to-panel variation in thickness, resin content, and fiber volume ratio were measured. Ultimately, process-related deviations drove penetration limits on impact. Influence of axial tow alignment was difficult to discern outside of the processing-induced variations between panels.