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基于裂纹扩展过程中应变能释放行为的聚合物梁结构中热塑性弹性体胶囊自愈能力分析

Analysis of the Self-Healing Capability of Thermoplastic Elastomer Capsules in a Polymeric Beam Structure Based on Strain Energy Release Behaviour during Crack Growth.

作者信息

Almutairi Mohammed Dukhi, He Feiyang, Alshammari Yousef Lafi, Alnahdi Sultan Saleh, Khan Muhammad Ali

机构信息

School of Aerospace, Transport, and Manufacturing, Cranfield University, Cranfield MK43 0AL, UK.

Centre for Life-Cycle Engineering and Management, Cranfield University, College Road, Cranfield MK43 0AL, UK.

出版信息

Polymers (Basel). 2023 Aug 12;15(16):3384. doi: 10.3390/polym15163384.

DOI:10.3390/polym15163384
PMID:37631441
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10458547/
Abstract

The objective of this study was to investigate the elastic and plastic responses of 3D-printed thermoplastic elastomer (TPE) beams under various bending loads. The study also aimed to develop a self-healing mechanism using origami TPE capsules embedded within an ABS structure. These cross-shaped capsules have the ability to be either folded or elastically deformed. When a crack occurs in the ABS structure, the strain is released, causing the TPE capsule to unfold along the crack direction, thereby enhancing the crack resistance of the ABS structure. The enhanced ability to resist cracks was confirmed through a delamination test on a double cantilever specimen subjected to quasi-static load conditions. Consistent test outcomes highlighted how the self-healing process influenced the development of structural cracks. These results indicate that the suggested self-healing mechanism has the potential to be a unique addition to current methods, which mostly rely on external healing agents.

摘要

本研究的目的是研究3D打印热塑性弹性体（TPE）梁在各种弯曲载荷下的弹性和塑性响应。该研究还旨在利用嵌入ABS结构中的折纸TPE胶囊开发一种自愈机制。这些十字形胶囊能够折叠或弹性变形。当ABS结构出现裂缝时，应变得以释放，导致TPE胶囊沿裂缝方向展开，从而增强ABS结构的抗裂性。通过对承受准静态载荷条件的双悬臂试样进行分层试验，证实了抗裂能力的增强。一致的试验结果突出了自愈过程对结构裂缝发展的影响。这些结果表明，所提出的自愈机制有可能成为当前主要依赖外部愈合剂的方法的独特补充。

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