Analytical solution and experimental verification for elastoplastic deformation of coronary stents

IF 3.8 3区工程技术 Q1 MECHANICS

International Journal of Solids and Structures Pub Date : 2025-07-15 DOI:10.1016/j.ijsolstr.2025.113570

Jing Zhang , Xinchun Shang

引用次数: 0

Abstract

The mechanical behaviours of the Palmaz-Schatz stent, including expansion, foreshortening and recoil, were analyzed. Based on Timoshenko beam bending theory and the linearly hardened elastoplastic constitutive relationship, the mathematical model of the problem was developed through equilibrium and deformation analysis of the stent’s substructural units. The explicit relationship between the radial expansion deformation and the pressure applied to the stent’s inner wall was derived analytically. Expansion experiments were designed and performed on the stents with enlarged size. The results verified the applicability of the proposed theoretical model and analytical solutions. The effects of geometric and material parameters on the stent’s elastoplastic deformation were analyzed.

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冠状动脉支架弹塑性变形的解析解与实验验证

分析了Palmaz-Schatz支架的力学性能，包括膨胀、预缩和后坐力。基于Timoshenko梁弯曲理论和线硬化弹塑性本构关系，通过对支架子结构单元的平衡和变形分析，建立了该问题的数学模型。导出了支架径向膨胀变形与支架内壁压力之间的显式关系。设计并进行了扩大支架尺寸的扩展实验。结果验证了所提理论模型和解析解的适用性。分析了几何参数和材料参数对支架弹塑性变形的影响。

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

International Journal of Solids and Structures 物理-力学

CiteScore

6.70

自引率

8.30%

发文量

405

审稿时长

70 days

期刊介绍： The International Journal of Solids and Structures has as its objective the publication and dissemination of original research in Mechanics of Solids and Structures as a field of Applied Science and Engineering. It fosters thus the exchange of ideas among workers in different parts of the world and also among workers who emphasize different aspects of the foundations and applications of the field. Standing as it does at the cross-roads of Materials Science, Life Sciences, Mathematics, Physics and Engineering Design, the Mechanics of Solids and Structures is experiencing considerable growth as a result of recent technological advances. The Journal, by providing an international medium of communication, is encouraging this growth and is encompassing all aspects of the field from the more classical problems of structural analysis to mechanics of solids continually interacting with other media and including fracture, flow, wave propagation, heat transfer, thermal effects in solids, optimum design methods, model analysis, structural topology and numerical techniques. Interest extends to both inorganic and organic solids and structures.