Shock compressibility and spall strength of textolite depending on fiber orientation

IF 1.1 4区工程技术 Q3 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Archives of Mechanics Pub Date : 2019-05-28 DOI:10.24423/AOM.3144

V. Mochalova, A. Utkin, V. Rykova, M. Endres, D. Hoffmann

引用次数: 2

Abstract

The experimental study of shock wave compressibility and spall strength of an aramid fiber reinforced epoxy composite (textolite) for two fiber orientations was performed by the VISAR interferometer. The particle velocity profiles were obtained at velocities of the flyer plate from 0.65 to 5.05 km/s. The sound speed of textolite for the longitudinal direction is three times higher than that for transverse one, and as a result, the particle velocity profiles are different for two orientations. For the transverse direction of the fibers, a single shock wave is observed, while for longitudinal one, a two-wave configuration is recorded up to 20 GPa. Hugoniot parameters for both orientations of the fibers were found up to 35 GPa: D = 2.37 + 1.26 ∗ u – for transverse one and D = 1.45 + 2.05 ∗ u – for longitudinal, where D is the shock wave velocity and u is the particle velocity. The spall strength of textolite is equal to 61 MPa for shocks traveling along the fibers, and this is almost twice higher than that for the transverse direction.

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纤维取向对纺织石的冲击压缩性能和剥落强度的影响

利用VISAR干涉仪对芳纶纤维增强环氧复合材料(textolite)在两种纤维取向下的冲击波压缩性和碎片强度进行了实验研究。在0.65 ~ 5.05 km/s的飞片速度范围内，得到了颗粒速度分布。纵向上的声速比横向上的声速高3倍，导致两个方向上的声速分布不同。对于纤维的横向，可以观察到单个激波，而对于纵向，可以记录到高达20 GPa的双波配置。在35 GPa以下，纤维的Hugoniot参数为横向的D = 2.37 + 1.26∗u -，纵向的D = 1.45 + 2.05∗u -，其中D为激波速度，u为粒子速度。在沿纤维方向的冲击下，纺织石的小块强度为61 MPa，几乎是横向冲击强度的两倍。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Archives of Mechanics 工程技术-材料科学：表征与测试

CiteScore

1.40

自引率

12.50%

发文量

审稿时长

>12 weeks

期刊介绍： Archives of Mechanics provides a forum for original research on mechanics of solids, fluids and discrete systems, including the development of mathematical methods for solving mechanical problems. The journal encompasses all aspects of the field, with the emphasis placed on: -mechanics of materials: elasticity, plasticity, time-dependent phenomena, phase transformation, damage, fracture; physical and experimental foundations, micromechanics, thermodynamics, instabilities; -methods and problems in continuum mechanics: general theory and novel applications, thermomechanics, structural analysis, porous media, contact problems; -dynamics of material systems; -fluid flows and interactions with solids. Papers published in the Archives should contain original contributions dealing with theoretical, experimental, or numerical aspects of mechanical problems listed above. The journal publishes also current announcements and information about important scientific events of possible interest to its readers, like conferences, congresses, symposia, work-shops, courses, etc. Occasionally, special issues of the journal may be devoted to publication of all or selected papers presented at international conferences or other scientific meetings. However, all papers intended for such an issue are subjected to the usual reviewing and acceptance procedure.