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Temperature-dependent interlaminar shear strength of unidirectional continuous fiber-reinforced thermoplastic profiles
Composite Structures ( IF 6.3 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.compstruct.2020.112959
A. Maier , N. Schramm , L. Kroll

Abstract Fiber-reinforced thermoplastic composites offer a high potential for high-volume car body structures. A tailored use of thermoformed and subsequently injection overmolded unidirectional pultruded material in the so-called “skeleton design” is a promising approach towards economical lightweight design. The paper investigates the interlaminar shear strength of pultruded specimens for polyamide 6 and polypropylene as matrices at various temperature degrees. The specimens are made of different ratios of glass and carbon fibers. The results are compared to tape-laid specimens of the same materials to show the influence of the manufacturing technology. The performance is tested using a compression shear device at three testing temperatures −35 °C, +23 °C and +85 °C covering the typical temperature range for automobile structures as well as in conditioned and dry state. The interlaminar shear strength decreases on average by 65% from −35 °C to +85 °C, whereas conditioning reduces interlaminar shear strength by 25% at −35 °C and +23 °C with no influence at −35 °C. The results are analytically described in order to obtain a continuous description of the interlaminar shear strength within the analyzed temperature range.

中文翻译:

单向连续纤维增强热塑性型材的温度相关层间剪切强度

摘要 纤维增强热塑性复合材料为大容量车身结构提供了巨大的潜力。在所谓的“骨架设计”中定制使用热成型和随后注塑包覆成型的单向拉挤材料是实现经济轻量化设计的一种很有前途的方法。本文研究了以聚酰胺 6 和聚丙烯为基质的拉挤试样在不同温度下的层间剪切强度。试样由不同比例的玻璃纤维和碳纤维制成。将结果与相同材料的胶带铺设试样进行比较,以显示制造技术的影响。使用压缩剪切装置在三个测试温度 -35 °C 下测试性能,+23 °C 和 +85 °C 涵盖汽车结构以及空调和干燥状态的典型温度范围。从 -35 °C 到 +85 °C,层间剪切强度平均降低 65%,而调节在 -35 °C 和 +23 °C 时将层间剪切强度降低 25%,而在 -35 °C 时没有影响。对结果进行分析描述,以获得分析温度范围内层间剪切强度的连续描述。
更新日期:2021-01-01
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