航空学报 > 1994, Vol. 15 Issue (12): 1456-1462

环氧基复合材料的混合模式分层

赵时熙1, M.盖德克2, R.普林茨2   

  1. 1. 北京航空航天大学104教研室, 北京, 100083;2. 德国航空航天研究院, 不伦瑞克, 38108
  • 收稿日期:1994-02-28 修回日期:1994-05-15 出版日期:1994-12-25 发布日期:1994-12-25

MIXEC-MODE DELAMINATION OF EPOXY-BASED COMPOSITES

Zhao Shixi1, M. Gaedke2, R. Prinz2   

  1. 1. Faculty 104, Beijing University of Aeronautics and Astronautics, Beijing, 100083;2. German Aerospace Research Establishment, Braunschweig, 38108
  • Received:1994-02-28 Revised:1994-05-15 Online:1994-12-25 Published:1994-12-25

摘要: 采用混合模式弯曲试验研究了T300/M10和HTA/6376两种复合材料静态和疲劳加载的分层断裂行为。在不同α/L比和混合模式比条件下加载,两种材料呈现脆性不稳定或脆性稳定的裂纹扩展。在疲劳加载中,裂纹扩展始终是稳定的。混合模式比对分层韧性、疲劳裂纹扩展速率和疲劳门槛值均有明显影响。

关键词: 石墨—环氧复合材料, 混合, 模式, 应变能释放率, 疲劳试验, 裂纹扩展,

Abstract: he mixed mode bending(MMB)test was employed in an investigation of delamination fracture behavior in static and fatigue loading for graphites/epoxy composites T300/M 10 and HTA/6376.As specimens were loaded at different ratio of α/L for fifferent mixed mode ratios,both the investigated composites exhibited brittle unstable or brittle stable behavior of crack growth.During fatigue loading stable crack growth was observed over the en-tire range of crack lengths investigated.The mixed mode ratio has a distinct effect on the delamination toughness,the fatigue crack growth rate and the threshold of composites.

Key words: graphite-epoxy composites, mixed, mode, strain energy release rate, fatigue testscrack propagation, thresholds

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