首页> 外文OA文献 >Damage Growth Studies on Composite Flap StructuresudUnder Fatigue Loading
【2h】

Damage Growth Studies on Composite Flap StructuresudUnder Fatigue Loading

机译:复合瓣结构的损伤增长研究 ud在疲劳加载下

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

The rib-skin construction using carbon fiber composites has been an attractive design option for aircraft control surfaces like aileron, elevator, rudder, flap etc. The major concern in such structures is the debonding between skin and rib flange which can occur due to low velocity impacts like tool drops, run way debris etc. Such debonds which occur in service are barely visible and may not get detected till the next inspection schedule. The integrity of the structureudin the intervening period is of great concern to the designers. In the present work, the structural integrity of a composite flap structure having multiple debonds at the rib skin interfaces under fatigue loading has been addressed. The flap is subjected to cyclic loading atuddesign limit load for 110000 cycles using a whiffle tree mechanism. The strains have been monitored at different locations to understand the behaviour of structure during the test using strain gauges and Fiber Bragg Grating (FBG) sensors. Ultrasonic A-scan was used to monitor the defect growth after each block of 1000 cycles. The growth of debonds was not significant during the fatigue testing. The strain levels did not change appreciably throughout the testudperiod indicating the damage tolerance capacity of the flap structure. The low growth of debonds was attributed to the low level of strains in the structure since the flap design is driven by stiffness considerations.
机译:对于副翼,升降舵,方向舵,襟翼等飞机控制表面,使用碳纤维复合材料制成的肋骨结构是一种有吸引力的设计选择。此类结构中的主要问题是由于低速而可能导致蒙皮与肋骨凸缘之间的剥离诸如工具掉落,运行中的碎屑之类的影响。这种在使用中发生的脱胶几乎看不见,并且可能要等到下一个检查计划才能被发现。在介入期间,结构的完整性是设计人员非常关心的问题。在当前工作中,已经解决了在疲劳载荷下在肋骨皮肤界面处具有多个脱粘的复合翼片结构的结构完整性。使用摆动树机制,襟翼在设计极限载荷下承受循环载荷110000次。已使用应变仪和光纤布拉格光栅(FBG)传感器在不同位置监视了应变,以了解测试期间结构的行为。超声波A扫描用于监测每1000个循环周期后的缺陷生长。在疲劳测试期间,脱胶的增长并不明显。在整个测试期间,应变水平没有明显变化,表明襟翼结构的损伤耐受能力。脱胶的低增长归因于结构中的低应变水平,因为襟翼设计受刚度考虑因素的驱动。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号