Abstract

A complex technique for thermal characterization of small-sized defects such as discontinuities in intricately shaped composite structures is presented. The complex defect characterization technique is based on revealing and identifying internal defects as sources of heat due to extraneous stimulation sources. The use of this complex technique makes it possible to identify types of defects that remain virtually unnoticed with the existing methods, for example, defects of small sizes, closed cracks, microcracks, etc. and determine their location in the material. It is shown that the error in determining the depth of defects in the material by the proposed integrated technique is better than 10–15%, a figure that is quite acceptable for practical usage.

中文翻译：

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超声热成像和电热成像技术在复杂形状空间复合结构中小型缺陷的热表征中的应用

摘要

提出了一种复杂的技术，用于热表征小尺寸缺陷，例如复杂形状的复合结构中的不连续性。复杂的缺陷表征技术是基于揭示和识别内部缺陷作为外部刺激源产生的热源。使用这种复杂的技术可以识别现有方法实际上未引起注意的缺陷类型，例如小尺寸缺陷，闭合裂纹，微裂纹等，并确定它们在材料中的位置。结果表明，通过所提出的集成技术确定材料中缺陷深度的误差优于10％至15％，这一数字对于实际使用是可以接受的。