Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Rod-shaped preform with high length-diameter ratio and preparation method of rod-shaped preform
The invention discloses a rod-shaped preform with a high length-diameter ratio and a preparation method of the rod-shaped preform, and solves the problem of non-uniform distribution of fiber reinforcements in thread teeth of a ceramic matrix composite bolt based on an existing preform. The preparation method comprises the steps of firstly, designing a fiber preform into a core structure and a cladding structure; and then determining the number of fiber bundles of the cladding and the core, uniformly distributing the unidirectional fiber bundles to form a bundle structure, and binding the bundle structure by adopting fused glass fibers in the spiral direction to form a unidirectional fiber bundle core structure; then weaving a fiber bundle cladding on the surface of the core body by adopting a weaving method so as to enable the core body unidirectional fiber bundle preform to be subjected to the pressure stress of the cladding woven preform; and finally, sewing the core body and the cladding preform by using the fine molten glass fibers to form a rod-shaped preform. According to the prepared novel rod-shaped preform structure with the high length-diameter ratio, uniform distribution of fiber reinforcements in the thread teeth can be achieved, the cladding thread teeth can have more excellent obdurability, and the fiber obdurability of the core body unidirectional fiber bundles can be fully exerted.
本发明公开了一种高长径比棒状预制体及其制备方法，解决基于现有预制体的陶瓷基复合材料螺栓螺纹牙内纤维增强体非均匀分布的问题。首先将纤维预制体设计为芯体结构和包层结构。然后确定包层和芯体的纤维束数量，将单向纤维束均匀分布形成集束结构，并采用熔融玻璃丝按螺旋方向捆绑，形成单向纤维集束的芯体结构。之后采用编织方法在其表面编织纤维束包层，使得芯体单向纤维集束预制体受到包层编织预制体的压应力。最后细熔融玻璃丝缝合芯体和包层预制体，形成棒状预制体。本发明制备的新型高长径比棒状预制体结构，可实现螺纹牙内纤维增强体均匀分布，有助于包层螺纹牙具有更优异强韧性，芯体单向纤维束充分发挥纤维强韧性。
Rod-shaped preform with high length-diameter ratio and preparation method of rod-shaped preform
The invention discloses a rod-shaped preform with a high length-diameter ratio and a preparation method of the rod-shaped preform, and solves the problem of non-uniform distribution of fiber reinforcements in thread teeth of a ceramic matrix composite bolt based on an existing preform. The preparation method comprises the steps of firstly, designing a fiber preform into a core structure and a cladding structure; and then determining the number of fiber bundles of the cladding and the core, uniformly distributing the unidirectional fiber bundles to form a bundle structure, and binding the bundle structure by adopting fused glass fibers in the spiral direction to form a unidirectional fiber bundle core structure; then weaving a fiber bundle cladding on the surface of the core body by adopting a weaving method so as to enable the core body unidirectional fiber bundle preform to be subjected to the pressure stress of the cladding woven preform; and finally, sewing the core body and the cladding preform by using the fine molten glass fibers to form a rod-shaped preform. According to the prepared novel rod-shaped preform structure with the high length-diameter ratio, uniform distribution of fiber reinforcements in the thread teeth can be achieved, the cladding thread teeth can have more excellent obdurability, and the fiber obdurability of the core body unidirectional fiber bundles can be fully exerted.
本发明公开了一种高长径比棒状预制体及其制备方法，解决基于现有预制体的陶瓷基复合材料螺栓螺纹牙内纤维增强体非均匀分布的问题。首先将纤维预制体设计为芯体结构和包层结构。然后确定包层和芯体的纤维束数量，将单向纤维束均匀分布形成集束结构，并采用熔融玻璃丝按螺旋方向捆绑，形成单向纤维集束的芯体结构。之后采用编织方法在其表面编织纤维束包层，使得芯体单向纤维集束预制体受到包层编织预制体的压应力。最后细熔融玻璃丝缝合芯体和包层预制体，形成棒状预制体。本发明制备的新型高长径比棒状预制体结构，可实现螺纹牙内纤维增强体均匀分布，有助于包层螺纹牙具有更优异强韧性，芯体单向纤维束充分发挥纤维强韧性。
Rod-shaped preform with high length-diameter ratio and preparation method of rod-shaped preform
一种高长径比棒状预制体及其制备方法
ZHANG YI (Autor:in) / CHENG LAIFEI (Autor:in) / FU ZHIQIANG (Autor:in) / CHEN CHAO (Autor:in) / CHEN XU (Autor:in) / WEI CHONG (Autor:in) / LI XUQIN (Autor:in)
19.11.2021
Patent
Elektronische Ressource
Chinesisch
Carbon fiber preform, preparation method thereof and densification method of carbon fiber preform
| Europäisches Patentamt | 2021