Bulge forming of braided thermoplastic composite tubes under axial compression and internal pressure
Bulge forming of braided thermoplastic composite tubes under axial compression and internal pressure
复制标题
轴向压缩和内压下编织热塑性复合材料管的胀形成形
DOI：
10.1002/pc.10596
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发表时间：
1996
影响因子：
5.2
通讯作者：
J. Ozaki
中科院分区：
文献类型：
--
作者：
K. Manabe;J. Ozaki
在这项研究中，纤维增强热塑性塑料（FRTP）复合材料编织管的胀形成型作为一种新的成型技术，利用纤维取向重排（网格效应）在基体熔点附近的温度进行了研究。结果表明，具有网格效应的自由胀形成形仅通过轴向压缩就能实现高膨胀而不屈曲。这是当基质的应力足够小以重新排列编织物的纤维取向时。为了提高零件的表面质量和尺寸精度，本文还进行了闭模内压胀形试验研究。建立了合适的轴向穿透和内压条件。辫子的运动学也被认为是，从模型的计算进行评估，从实验。此外，通过几何辫模型的计算，模拟了辫变形后的运动状态。结果表明，胀形管的“归一化轮廓”在成形过程中基本不变，基体的厚度取决于纤维取向的变化。
In this study, the bulge forming of fiber reinforced thermoplastic (FRTP) composite braided tubes was studied as a new forming technique utilizing fiber orientation rearrangement (the trellis effect) at temperatures near the matrix melting point. It is shown that free bulge forming with the trellis effect can easily result in high expansion without buckling only by axial compression. This is when the stress of the matrix is small enough to rearrange the fiber orientation of the braid. To improve the surface quality and dimensional accuracy, bulge forming with closed dies and internal pressure was also examined experimentally. The appropriate conditions for axial penetration and internal pressure are established. The kinematics of braid is also considered, and calculations from the model are evaluated from experiments. In addition, the kinematic state of braid after deformation is simulated by calculation from the geometric braid model. It is found that the “normalized profile” of the bulged tube does not change during the process and the thickness of the matrix depends on changing fiber orientation.