Thermal cycling effects on the dimensional stability of P75 and P75-T300 (fabric) hybrid graphite/epoxy laminates
Thermal cycling effects on the dimensional stability of P75 and P75-T300 (fabric) hybrid graphite/epoxy laminates
复制标题
热循环对 P75 和 P75-T300（织物）混合石墨/环氧树脂层压板尺寸稳定性的影响
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
James Y. Shen
中科院分区：
文献类型：
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作者：
D. Bowles;James Y. Shen
对交叉铺层P75/934层压板和由P75/934单向带和T300/934编织织物组成的混合层压板在+和-250 ° F之间的温度暴露下的响应进行了比较，最多250次循环。监测的性能包括微裂纹密度，热膨胀系数（CTE），残余应变和拉伸模量。具有与P75/934交叉层压板相当的刚度和CTE的混合层压板在一个方向上表现出显著改善的热循环稳定性。混合层压板还具有与小角度、离轴P75/934配置相当的预测纵向特性，但具有显著更高的预测横向强度。T300 Gr/Ep平纹织物层合板比T300 Gr/Ep交叉层板对热循环损伤的敏感性低得多。测试的层压材料在热循环后没有表现出拉伸模量的任何显著变化。
The response of cross-ply P75/934 laminates and hybrid laminates consisting of P75/934 unidirectional tape and T300/934 woven fabric were compared for temperature exposures between + and - 250 F up to a maximum of 250 cycles. The properties monitored included microcrack density, coefficient of thermal expansion (CTE), residual strain, and tensile modulus. Hybrid laminates, with stiffnesses and CTE's comparable to P75/934 cross-ply laminates, demonstrated significantly improved thermal cycling stability in one direction. The hybrid laminates also had predicted longitudinal properties comparable to low angle, off-axis P75/934 configurations, but had significantly higher predicted transverse strengths. T300 Gr/Ep plain-weave fabric laminates were shown to be much less susceptible to thermal cycling damage than T300 Gr/Ep cross-ply laminates. None of the laminates tested exhibited any significant changes in tensile modulus after thermal cycling.