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LIFE EXTENSION OF IMPACT DAMAGED HONEYCOMB SANDWICH PANELS

机译:抗冲击损坏蜂窝夹层面板的寿命延伸

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摘要

The assessment of damage due to impacts in composite sandwich panels and the component life reductions associated with such damage is becoming increasingly important within the aerospace industry. This study analyses minimum gauge, non-metallic honeycomb wing panels subject to impact damage. In all instances the damage is caused by "soft body" impactors travelling at elevated velocities to simulate bird strike and other soft debris. The damage formed during these impacts is shown to be large in plan area but shallow and primarily causes crushing of the core in a thin layer. Loading of the panels after impact has been performed to determine the reduction in load carrying capacity and associated failure mechanisms. Damage due to soft body impact is shown to be very different to the classical rigid body impact upon which current repair schemes are based. As a result in many applications the use of current repair schemes may be inappropriate. The viability of new repair techniques is discussed with particular attention to the prevention of failure mechanisms due to loading after impact.
机译:由于复合夹层面板的影响和与此类损害相关的部件寿命减少的损害的评估在航空航天行业中越来越重要。本研究分析了最小规格,非金属蜂窝翼面板受冲击损伤。在所有情况下,损坏是由在升高的速度下行驶的“软体”撞击器引起,以模拟鸟撞击和其他软碎片。在这些冲击期间形成的损坏在平面区域中显示出大,但浅,主要导致芯在薄层中碾碎。已经进行了冲击后装载面板以确定负载承载能力和相关的故障机制的降低。由于软体冲击导致的损坏与经典的刚体影响非常不同,当前修复方案是基于的。结果,许多应用程序使用当前的修复方案可能是不合适的。讨论了新修复技术的可行性,特别注意了冲击后由于装载而预防失效机制。

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