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首页> 外文期刊>Composite Structures >High temperature fatigue of carbon/polyimide 8-harness satin woven composites. Part I: Digital Image Correlation and Micro-Computed Tomography damage characterization
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High temperature fatigue of carbon/polyimide 8-harness satin woven composites. Part I: Digital Image Correlation and Micro-Computed Tomography damage characterization

机译：碳/聚酰亚胺8线缎面编织复合材料的高温疲劳。第一部分：数字图像相关和微计算机断层扫描损伤表征

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摘要

This paper focuses on the experimental high temperature fatigue of Carbon/polyimide 8-harness satin woven composite materials. Traction-traction (R = 0.1) fatigue tests at 250 degrees C are carried out on Carbon/polyimide [45](6) 8-harness satin woven composites under three different environments (air, 2 bar N-2, 2 bar O-2). Part I is specifically devoted to image based damage characterization by employment of Digital Image Correlation (DIC) and Micro-Computed Tomography (mu-CT) techniques. For the used samples, intra tow matrix cracks along fibres on the external plies are the first damage form at the ply-scale. Damage evolution on the sample surface can be followed during the test (in situ) by using 2D DIC. Moreover, fatigue tests are periodically interrupted to perform mu-CT scans to characterize and quantify the damage in the volume of the samples. The obtained results prove that the damage assessment methods presented in this work are suitable for environmentally-assisted fatigue tests on composite materials.
机译：本文重点介绍碳/聚酰亚胺8线缎织物复合材料的实验高温疲劳。在三种不同环境下的碳/聚酰亚胺[45]（6）8-harness缎面编织复合材料上进行250℃的牵引牵引（r = 0.1）疲劳试验（在三种不同的环境下进行（空气，2巴N-2，2 bar O- 2）。通过使用数字图像相关（DIC）和微计算机断层扫描（MU-CT）技术，专门专门致力于基于基于图像的损伤表征。对于所用样品，沿外帘线上的纤维内的牵引基质裂缝是帘布级的第一损伤形式。通过使用2D DIC在测试期间，可以遵循样品表面上的损伤进化。此外，周期性地中断疲劳试验以进行MU-CT扫描，以表征和量化样品体积的损伤。所获得的结果证明，本作作品中提出的损伤评估方法适用于对复合材料的环境辅助疲劳试验。

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