The Effect of Environmental Flight Conditions on Damage Propagation in Composite Sandwich Structure

Q4 Engineering

Fatigue of Aircraft Structures Pub Date : 2015-01-01 DOI:10.1515/fas-2015-0004

P. Synaszko, Michał Sałaciński, Ł. Kornas

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引用次数: 5

Abstract

Abstract The aim of the study was to determine the traceability of damage growth caused by inclusions of water in the composite sandwich structure. It was assumed that as a result of temperature changes during the flight and accompanying phase transformation, the zone containing water inclusions increases. The growth is caused by the destruction (mainly the tearing of walls) of the core. As part of the work, this assumption was verified experimentally. For the experiment to be successful it was necessary to simulate actual flight conditions. The simulation involved inducing phase transformations of water in the core cell as a function of time and temperature. Before and after the experiments the non-destructive tests using pulsed thermography were performed. The test results revealed an increase in the number of cells occupied by water. Adequate specimens were designed and manufactured. The study showed that cyclical changes in temperature affected the propagation of water in core sandwich structures. Further, it was found that the increase in the surface area of water-containing inclusions could be monitored using thermographic techniques.

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环境飞行条件对复合材料夹层结构损伤扩展的影响

摘要本研究的目的是确定复合材料夹层结构中水夹杂物损伤生长的可追溯性。假设由于飞行过程中温度的变化和伴随的相变，含水包裹体区域增大。生长是由岩心的破坏(主要是岩壁的撕裂)引起的。作为工作的一部分，这一假设得到了实验的验证。为了使实验成功，有必要模拟实际的飞行条件。模拟包括诱导核心细胞中水的相变作为时间和温度的函数。实验前后分别进行了脉冲热成像无损检测。测试结果显示被水占据的细胞数量增加。设计和制造了足够的样品。研究表明，温度的周期性变化影响了水在岩心夹层结构中的传播。此外，还发现可以使用热成像技术监测含水包裹体表面积的增加。

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

Fatigue of Aircraft Structures Engineering-Safety, Risk, Reliability and Quality

CiteScore

0.40

自引率

0.00%

发文量

期刊介绍： The publication focuses on problems of aeronautical fatigue and structural integrity. The preferred topics include: full-scale fatigue testing of aircraft and aircraft structural components, fatigue of materials and structures, advanced materials and innovative structural concepts, damage tolerant design of aircraft structure, life extension and management of ageing fleets, structural health monitoring and loads, fatigue crack growth and life prediction methods, NDT inspections, airworthiness considerations.