编织复合材料弹体和靶板偏航撞击响应分析
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Impact Response of Triaxial Braided Composite Impacted By Composite Projectile with Yaw Angle
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    摘要:

    为研究复合材料机匣在复合材料弹体撞击过程中弹体的破坏模式与机匣吸能特性,在ANSYS/LS-DYNA软件中基于连续损伤力学模型开展了一系列的复合材料弹体偏航撞击仿真。仿真结果表明:对于偏航撞击,随着偏航角度的增加,弹体剩余动能逐渐减小,靶板吸收的能量逐渐增大,主要是因为偏航角度越大,弹体与靶板接触面积逐渐增大。同时通过仿真得到钛合金弹体冲击复合材料靶板的计算结果,发现钛合金弹体临界穿透速度比复合材料弹体小,更易击穿靶板,因此复合材料叶片的使用不仅可以减轻叶片的质量,也有助于改善机匣包容性。

    Abstract:

    To reproduce the containment process of composite fan casing impacted by composite fan blade during blade out event, a series of ballistic impact simulations of triaxial braided composite panel by composite blade-like projectile with yaw angle are conducted based on the continuum damage mechanics model in commercial finite element codes ANSYS/ LS-DYNA. Numerical results indicate that for the yaw impact, the residual kinetic energy of projectile decreases and the absorbed energy of target increases with the increase of yaw angle, which is mainly caused by the enlargement of impact influence area. Ballistic impact simulations are also conducted with titanium blade-like projectile with the same weight and geometry except the thickness. It is found that the titanium projectile is easier to perforate the target than the composite projectile, so the employment of composite fan blade can provide the additional benefits of casing weight reduction besides its own weight reduction, which is very promising in aero-engine industry.

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许善迎 关玉璞 刘璐璐 赵振华 陈伟 .编织复合材料弹体和靶板偏航撞击响应分析[J].南京航空航天大学学报,2017,49(1):67-75

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  • 在线发布日期: 2017-03-02
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