Composites Part A: Applied Science and Manufacturing ( IF 8.7 ) Pub Date : 2020-09-08 , DOI: 10.1016/j.compositesa.2020.106112 J.-C. Zarges , P. Sälzer , H.-P. Heim
Based on the varying fiber orientation in injection-molded composites, this study is focused on characterizing the fiber matrix adhesion of varying embedding angles of regenerated cellulose fibers (RCF) and glass fibers (GF) in a Polypropylene (PP) matrix with varying contents of maleic anhydride acid (MAPP) as coupling agent. The interfacial shear strength (IFSS) and critical fiber length (lc) were determined using the single fiber pull-out test (SFPT).
The results showed that the IFSS and lc of fibers with an embedding angle >0° can only be calculated with a correction factor from the standard SFPT with an angle of 0°. Furthermore, a comparison of the resulting angle-dependent lc with the angles and lengths of several thousand fibers in representative injection-molded specimens, characterized by X-ray microtomography, allowed a detailed calculation of the amounts of fiber pull-outs and ruptures for a very precise statement of the failure processes e.g. for fracture mechanical models.
中文翻译:
注塑聚丙烯纤维素纤维复合材料纤维取向与纤维-基体相互作用的相关性
基于注塑复合材料中纤维取向的变化,本研究着重于表征不同基质含量的聚丙烯(PP)基质中不同的再生纤维素纤维(RCF)和玻璃纤维(GF)包埋角在纤维基质中的粘附力。马来酸酐酸(MAPP)作为偶联剂。使用单纤维拉出试验(SFPT)确定界面剪切强度(IFSS)和临界纤维长度(l c)。
结果表明,包埋角> 0°的光纤的IFSS和l c只能使用角度为0°的标准SFPT的校正因子来计算。此外,所得的取决于角度的升的比较ç与几千纤维代表注塑试样,其特征在于通过X射线显微断层的角度和长度,使得纤维拉奏和破裂的量的进行了详细的计算对破坏过程的非常精确的陈述,例如对于断裂力学模型。