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Review of Non-destructive Testing (NDT) Techniques and their applicability to thick walled composites

机译:审查非破坏性测试(NDT)技术及其对厚壁复合材料的适用性

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A tier 1 automotive supplier has developed a novel and unique kinetic energy recovery storage system for both retro-fitting and OEM application for public transport systems where periodic stop start behaviour is paramount. A major component of the system is a composite flywheel spinning at up to 36,000 rpm (600 Hz). Material soundness is an essential requirement of the flywheel to ensure failure does not occur. The component is particularly thick for a composite being up to 30 mm cross section in some places. The geometry, scale and material make-up pose some challenges for conventional NDT systems. Damage can arise in composite materials during material processing, fabrication of the component or in-service activities among which delamination, cracks and porosity are the most common defects. A number of non-destructive testing (NDT) techniques are effective in testing components for defects without damaging the component. NDT techniques like Ultrasonic Testing, X-Ray, Radiography, Thermography, Eddy current and Acoustic Emission are current techniques for various testing applications. Each of these techniques uses different principles to look into the material for defects. However, the geometry, physical and material properties of the component being tested are important factors in the applicability of a technique. This paper reviews these NDT techniques and compares them in terms of characteristics and applicability to composite parts.
机译:一级汽车供应商开发了一种新颖独特的动能回收存储系统,可用于公共交通系统的复古和OEM应用,其中定期停止开始行为至关重要。该系统的主要组成部分是复合飞轮纺丝,高达36,000 rpm(600 Hz)。材料声音是飞轮的基本要求,以确保不会发生故障。该组分特别厚,在某些地方最多30毫米横截面。几何,规模和材料化妆对传统NDT系统构成了一些挑战。在材料加工期间,复合材料中可能出现损坏,在其中制造分层,裂缝和孔隙度是最常见的缺陷。许多非破坏性测试(NDT)技术在测试缺陷的组件方面是有效的,而不会损坏组件。 NDT技术,如超声波检测,X射线,造影,热成像,涡流和声学发射是各种测试应用的当前技术。这些技术中的每一种都使用不同的原理来查看缺陷的材料。然而,正在测试的部件的几何形状,物理和材料特性是技术适用性的重要因素。本文审查了这些NDT技术,并将其与复合部件的特性和适用性进行比较。

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