采用多相机数字图像相关技术对大型热防护系统复合板三点弯曲下的脱粘抗力进行了基准测试

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-09-20 DOI:10.1016/j.tws.2025.114015

Yi Luo , Shibo Yan , Tengfei Xu , Han Liu , Xiquan Zhu , Bing Pan

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引用次数: 0

摘要

在超长时间进入大气层/再进入大气层时，保持热防护系统的结构完整性对飞行安全至关重要。大型TPSs受到由机身弯曲和压差引起的弯曲载荷，导致弯曲变形。当结构变形引起的界面应力超过粘接承载能力时，TPS可能会从飞机上脱落，严重影响飞行安全。本研究对气凝胶基和酚醛浸渍碳烧蚀（PICA）基TPS的脱粘性能进行了基准实验研究。通过三点弯曲试验对气凝胶基和pica基TPS复合材料板的脱粘抗力进行了量化和比较。此外，采用多相机数字图像相关（MC-DIC）来研究脱粘机制。综合实验结果表明，气凝胶基TPS复合材料板比pica基TPS复合材料板具有更强的抗脱粘能力，这是由于气凝胶基TPS复合材料板具有更高的弯曲顺应性，从而减轻了局部应变积累，有效地延缓了脱粘的发生。这些发现为优化高级TPS的脱粘阻力提供了重要的见解。

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Benchmarking the debonding resistance of large-scale thermal protection system composite panels under three-point bending using multi-camera digital image correlation

During prolonged atmospheric entry/re-entry of hyper Mach aircraft, maintaining the structural integrity of the thermal protection system (TPS) is of critical importance for safe flight. Large-scale TPSs are subjected to bending loads induced by fuselage flexure and pressure differentials, resulting in bending deformation. TPS debonding from the aircraft may occur when the interfacial stresses induced by structural deformation exceed the bonding load-bearing capacity, severely compromising flight safety. This study conducts a benchmarking experimental investigation on the debonding resistance of aerogel-based and phenolic impregnated carbon ablator (PICA)-based TPS. The debonding resistance of aerogel-based and PICA-based TPS composite panels was quantified and compared through three-point bending tests. Additionally, multi-camera digital image correlation (MC-DIC) was employed to investigate debonding mechanisms. The comprehensive experiments conclusively establish that aerogel-based TPS composite panels exhibit enhanced debonding resistance to PICA-based TPS composite panels, attributable to the higher bending compliance of aerogel-based TPS composite panels, which mitigates localized strain accumulation and effectively delays debonding initiation. These findings provide crucial insights for optimizing debonding resistance in advanced TPS.

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.