Crack growth life assessment of the deep-sea manned cabin based on eddy current thermal imaging detection.

IF 1.3 4区工程技术 Q3 INSTRUMENTS & INSTRUMENTATION

Review of Scientific Instruments Pub Date : 2025-06-01 DOI:10.1063/5.0252121

Haixiong Ye, Shuai Wang, Tianli Tang, Yu Wu

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引用次数: 0

Abstract

Most of the deep-sea pressure-resistant structures are made of high-strength materials. The pressure-resistant structures are made with large-thickness welding technology, which can easily result in stress concentration and cracks. In this paper, a method for crack identification and life evaluation of pressure-resistant structures based on the crack is proposed. On the one hand, the principle of eddy current thermal imaging detection is used to identify cracks. The experimental platform is built to detect cracks in pressure-resistant structures. The titanium alloy samples with micro-cracks are detected to analyze the temperature distribution and heat conduction mechanisms of surface cracks. In addition, the correlation between transient temperature changes and crack damage is investigated. On the other hand, based on the detection of micro-cracks, a fatigue crack growth model is proposed to compute the fatigue crack growth life of the pressure hull. The rationality of the eddy current thermal imaging crack detection method and life evaluation of pressure-resistant structures is verified.

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基于涡流热成像检测的深海载人舱室裂纹扩展寿命评估。

大多数深海抗压结构都是由高强度材料制成的。耐压结构采用大厚度焊接工艺，容易产生应力集中和裂纹。本文提出了一种基于裂纹的耐压结构裂纹识别和寿命评估方法。一方面，利用涡流热成像检测原理识别裂纹；建立了抗压结构裂缝检测实验平台。对带有微裂纹的钛合金试样进行检测，分析表面裂纹的温度分布和热传导机理。此外，还研究了瞬态温度变化与裂纹损伤的关系。另一方面，在微裂纹检测的基础上，提出了疲劳裂纹扩展模型，计算了耐压壳体的疲劳裂纹扩展寿命。验证了涡流热成像裂纹检测方法和耐压结构寿命评估方法的合理性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Review of Scientific Instruments 工程技术-物理：应用

CiteScore

3.00

自引率

12.50%

发文量

758

审稿时长

2.6 months

期刊介绍： Review of Scientific Instruments, is committed to the publication of advances in scientific instruments, apparatuses, and techniques. RSI seeks to meet the needs of engineers and scientists in physics, chemistry, and the life sciences.