UNDERSTANDING THE ORIGINS OF DEFECTS AND VARIABILITY IN COMPOSITES MANUFACTURE
UNDERSTANDING THE ORIGINS OF DEFECTS AND VARIABILITY IN COMPOSITES MANUFACTURE
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发表时间：
2009
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通讯作者：
K. Potter
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作者：
K. Potter
随着飞机用先进复合材料部件数量的不断增加，以及主要结构越来越多地由先进复合材料制成，有必要对用于制造这些复合材料结构的材料、工艺和设计实践的质量进行审查。由于生产率预计将显著提高，因此质量目标必须是零缺陷、零返工和修理（以及相关的让步）以及零废品。本文回顾了飞机复合材料零件的变异性和缺陷的来源，并试图确定可以采取的方法，以产生更强大的设计和制造过程。对于高压釜和树脂传递模塑工艺，可以识别出130多种缺陷类型和60多种可变性和不可靠性来源。这些变异性的来源中有许多根源于所使用的增强件以及这些增强件映射到组件几何形状的方式。我们几乎所有的力学性能数据都是由平板层压板产生的，但几乎所有有用的部件都具有更复杂的几何形状。了解钢筋的潜在变异性及其变形和固结特性是了解产品性能变异性的关键之一。
As the volume of advanced composites components for aircraft applications continues to rise and primary structures are increasingly made from advanced composites it is necessary to review the quality of the materials, processes and design practices that are used to generate those composite structures. As production rates are expected to expand very markedly the quality target must be zero defects, zero rework and repair (with the associated concessions), and zero scrap. This paper reviews the sources of variability and defects in aircraft composite parts, and attempts to identify approaches that can be taken to generate more robust design and manufacturing processes. More than 130 defect types and more than 60 sources of variability and unreliability can be identified for the autoclave and resin transfer moulding processes. Many of these sources of variability have their roots in the reinforcements used and in the ways that those reinforcements map to the geometry of components. Almost all of our mechanical property data is generated from flat laminates, but almost all useful components are of more complex geometry. Understanding the underlying variability of reinforcements and their deformation and consolidation characteristics is one key to the understanding of variability in product performance.