Investigating De-Bonding Using an Impact Loaded Blister Test

IF 2 3区工程技术 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Experimental Mechanics Pub Date : 2025-01-13 DOI:10.1007/s11340-024-01137-y

S. Devi, V. Parameswaran

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引用次数: 0

Abstract

Background

De-bonding is a commonly observed failure in adhesively bonded system under impact loading. Therefore, it is important to understand such failures for properly designing and evaluating the integrity of these systems.

Objective

An Impact Loaded Blister Test (ILBT) is proposed to investigate de-bonding under impact loading and to obtain the de-bond initiation toughness. Further the Cohesive Zone (CZ) parameters for de-bonding are also determined.

Methods

An adhesively bonded steel-Poly Metha Methyl Acrylate (PMMA) system was used for tests. A polycarbonate (PC) loading bar, impacted by another PC bar, was used to load the PMMA layer and initiate growth of an existing de-bond. From the strain history measured at mid-length of the loading bar, the load and load-point displacement histories were calculated. The critical energy release rate at the instant the de-bond starts to grow was calculated through an axisymmetric analysis. Finite element analysis (FEA) with CZ was carried out and the remaining parameters of CZ were obtained by inverse approach.

Results

High-speed imaging of the de-bonding processes indicated a circular de-bond growing radially outward. Load-point displacement rate as high as 3.5 m/s was achieved. De-bond growth rate of 115 m/s and de-bond area growth rate of 8 m²/s were achieved. CZ parameters obtained through inverse approach were able to accurately predict the debonding observed in experiment.

Conclusion

The ILBT is demonstrated for isotropic material as a promising technique for determining the de-bond toughness and the CZ parameters of adhesively bonded systems under displacement rate comparable to that encountered in impact like situations.

Abstract Image

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使用冲击加载泡罩试验研究脱粘

脱粘是粘接系统在冲击载荷作用下常见的失效现象。因此，了解这些故障对于正确设计和评估这些系统的完整性是很重要的。目的采用冲击加载起泡试验（ILBT）研究冲击载荷下的脱粘，获得脱粘起裂韧性。进一步确定了脱键的内聚区（CZ）参数。方法采用粘接钢-聚甲基丙烯酸甲酯（PMMA）体系进行试验。一根聚碳酸酯（PC）加载棒受到另一根PC棒的冲击，用来加载PMMA层并引发现有脱键的生长。根据加载杆中长度处测量的应变历史，计算了荷载和荷载点位移历史。通过轴对称分析计算了脱键开始生长时的临界能量释放率。对CZ进行了有限元分析，并通过反求法得到了CZ的剩余参数。结果高速成像显示，脱键过程呈放射状向外生长。荷载点位移速率高达3.5 m/s。脱键生长速率为115 m/s，脱键面积增长速率为8 m2/s。通过逆方法得到的CZ参数能够准确预测实验中观察到的脱粘现象。结论：对于各向同性材料，ILBT是一种很有前途的技术，可用于确定位移速率下黏合系统的脱粘韧性和CZ参数。

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

Experimental Mechanics 物理-材料科学：表征与测试

CiteScore

4.40

自引率

16.70%

发文量

111

审稿时长

3 months

期刊介绍： Experimental Mechanics is the official journal of the Society for Experimental Mechanics that publishes papers in all areas of experimentation including its theoretical and computational analysis. The journal covers research in design and implementation of novel or improved experiments to characterize materials, structures and systems. Articles extending the frontiers of experimental mechanics at large and small scales are particularly welcome. Coverage extends from research in solid and fluids mechanics to fields at the intersection of disciplines including physics, chemistry and biology. Development of new devices and technologies for metrology applications in a wide range of industrial sectors (e.g., manufacturing, high-performance materials, aerospace, information technology, medicine, energy and environmental technologies) is also covered.