• Title/Summary/Keyword: braiding angle

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Transverse Low Velocity Impact Failure Behavior of Triaxial Braided Composite Tube with Different Braiding Angles (Triaxial braiding 기술을 이용한 원형 튜브의 횡방향 저속충격파괴 거동분석)

  • Sim, Ji-hyun;Park, Sung-min;Kim, Ji-hye;Shin, Dong-woo;Chon, Jin-sung;Kim, Jae-kwan;Bae, Jin-Seok
    • Textile Coloration and Finishing
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    • v.28 no.4
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    • pp.246-252
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    • 2016
  • In comparison to metal alloys, braided composite features a high impact resistance and crash energy absorption potential, and also it still remained competitive stiffness and strength properties. Braiding angle is one of the most important parameters which affect the mechanical behaviors of braided composite. This paper presents transverse low velocity impact failure behavior analysis on the carbon 3D triaxial braided composite tube with the braiding angle of $20^{\circ}$, $50^{\circ}$ and $80^{\circ}$. The flexural behaviour of 3D triaxial braided composite tube under bending loads was studied by conducting quasistatic three point bending test. Also, the low velocity impact responses of the braided composite tubes were also tested to obtain load-displacement curves and energy absorption. Consequently, the increase of the braided angle, the peak load also increases owing to the bigger bending stiffness.

Development of CFRP Tubes for the Light-Weight Propeller Shaft of 4WD SUV Vehicles (4륜구동 SUV 차량용 구동축 경량화를 위한 CFRP 튜브 개발)

  • Na, Hae-Jung;Chun, Jin-Sung;Cho, Kyu-Sang
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.17 no.4
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    • pp.32-38
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    • 2018
  • In this study, the one-piece propeller shaft composed of carbon/epoxy was designed and manufactured for 4 wheel drive automobiles that can bear the target torsional torque performance of 3.5kN.m. For the CFRP tube, braiding machine was used to weaving carbon fiber and it was formed the braided yarns with the braid angle ${\pm}45^{\circ}$ and axial yarns to improve strength of the lengthwise direction. The final CFRP tube of propeller shaft was evaluated through the torsional torque test. The CFRP propeller shaft satisfied requirement of the target torsional maximum torque of 3.5kN.m. Also, it was found that the one-piece composite propeller shaft with CFRP tube had 30% weight saving effect compared with a two-piece steel propeller shaft.

Mechanical Properties Prediction by Manufacturing Parameters for Braided Composites

  • Kim, Myungjun
    • Journal of Aerospace System Engineering
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    • v.14 no.4
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    • pp.25-31
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    • 2020
  • The development of manufacturing technology for braided composites has led to farther extension of the applications in aerospace structures. Since the mechanical characteristics of braided composites are affected by various materials and manufacturing parameters, it is important to determine the parameters required to appropriately design the braided composite structures. In this study, we proposed a geometric model of RUC (repeating unit cell) for 2D braided composites, and predicted the mechanical properties according to the change of fiber volume fraction, fiber filament size, braiding angle, and gap between adjacent yarns by the yarn slicing technique and stress averaging method. Finally, we analyze the characteristics of mechanical properties according to each manufacturing parameter of the braided composite material.