Dassios Konstantinos G, Kordatos Evangelos Z, Aggelis Dimitrios G, Matikas Theodore E
Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece.
ScientificWorldJournal. 2013 Jul 11;2013:715945. doi: 10.1155/2013/715945. Print 2013.
Infrared thermography (IRT) and acoustic emission (AE) are the two major nondestructive methodologies for evaluating damage in ceramic matrix composites (CMCs) for aerospace applications. The two techniques are applied herein to assess and monitor damage formation and evolution in a SiC-fiber reinforced CMC loaded under cyclic and fatigue loading. The paper explains how IRT and AE can be used for the assessment of the material's performance under fatigue. IRT and AE parameters are specifically used for the characterization of the complex damage mechanisms that occur during CMC fracture, and they enable the identification of the micromechanical processes that control material failure, mainly crack formation and propagation. Additionally, these nondestructive parameters help in early prediction of the residual life of the material and in establishing the fatigue limit of materials rapidly and accurately.
红外热成像（IRT）和声发射（AE）是评估用于航空航天应用的陶瓷基复合材料（CMC）损伤的两种主要无损检测方法。本文将这两种技术应用于评估和监测在循环和疲劳载荷作用下的碳化硅纤维增强CMC中的损伤形成和演变。本文阐述了IRT和AE如何用于评估材料在疲劳状态下的性能。IRT和AE参数专门用于表征CMC断裂过程中发生的复杂损伤机制，并且能够识别控制材料失效的微观力学过程，主要是裂纹的形成和扩展。此外，这些无损参数有助于早期预测材料的剩余寿命，并能快速、准确地确定材料的疲劳极限。
