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首页> 外文会议>Mechanical properties and performance of engineering ceramics and composites IX >INDICATORS FOR THE DAMAGE EVOLUTION AT INTERMEDIATE TEMPERATURE UNDER AIR OF A SIC/SI-B-C COMPOSITE SUBJECTED TO CYCLIC AND STATIC LOADING
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INDICATORS FOR THE DAMAGE EVOLUTION AT INTERMEDIATE TEMPERATURE UNDER AIR OF A SIC/SI-B-C COMPOSITE SUBJECTED TO CYCLIC AND STATIC LOADING

机译：受循环和静态载荷作用的SIC / SI-B-C复合材料在空气中中温下损伤演化的指标

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摘要

The low density and the high tensile strength of Ceramic Matrix Composites (CMC) make them a good technical solution to design aeronautical structural components. To fully understand damage mechanisms and be able to design components, its behavior has to be analyzed during fatigue tests. The aim of the present study is to compare behavior of this composite under static and cyclic loading. Tests are realized under the same conditions of temperature and maximal load levels in order to determine the effects of cycles on the sequence of damage mechanisms. Hence the evolution of mechanical parameters is analyzed. Nevertheless the complexity of mechanisms and duration of tests make the use of complementary damage indicators necessary. Different approaches based on acoustic emission can be taken into consideration in order to quantify damage along the tests. In this case the analysis of acoustical energy is studied by comparing to the evolution of strain energy. This method enables to point out different damage levels during tests.
机译：陶瓷基复合材料（CMC）的低密度和高拉伸强度使其成为设计航空结构部件的良好技术解决方案。为了充分了解损坏机制并能够设计组件，必须在疲劳测试期间分析其行为。本研究的目的是比较这种复合材料在静态和循环载荷下的行为。在相同的温度和最大负载水平条件下进行测试，以确定循环对损坏机理顺序的影响。因此，分析了机械参数的演变。然而，机制的复杂性和测试的持续时间使得必须使用互补的损坏指标。可以考虑基于声发射的不同方法，以便量化测试中的损坏。在这种情况下，通过比较应变能的演变来研究声能的分析。此方法可以指出测试期间的不同损坏级别。

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