具有厚度变化的 PMMA 半球形压力壳的屈曲分析

IF 3.4 3区工程技术 Q1 MECHANICS

International Journal of Solids and Structures Pub Date : 2024-10-22 DOI:10.1016/j.ijsolstr.2024.113109

Longhui Wang , Yongmei Zhu , Xilu Zhao , Jian Zhang

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引用次数: 0

摘要

实验和数值研究了聚甲基丙烯酸甲酯（PMMA）半球形压力壳在均匀外压下的屈曲行为。通过自由吹塑工艺制备了六个 PMMA 半球形压力壳。测量了每个半球形壳体的几何形状和壁厚。通过静水压力装置获得了所有壳体的坍塌载荷和最终失效模式。此外，通过光学三维扫描，建立了反映实际几何缺陷的半球形壳体数值模型，并将其用于有限元屈曲分析。数值结果与测试结果一致。这些研究结果为评估通过自由吹塑工艺制备的 PMMA 半球形外壳的屈曲载荷提供了参考。

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Buckling analysis of PMMA hemispherical pressure shells with thickness variation

The buckling behaviour of polymethyl methacrylate (PMMA) hemispherical pressure shells under uniform external pressure was investigated experimentally and numerically. Six PMMA hemispherical pressure shells were prepared via the free blow-forming process. The geometry and wall thickness of each hemispherical shell were measured. The collapse loads and final failure modes of all shells were obtained via a hydrostatic pressure device. In addition, through optical 3D scanning, a numerical model of the hemispherical shell that reflects the actual geometric imperfection was established and used in the finite element buckling analysis. The numerical results were in agreement with the test results. These findings provide a reference for evaluating the buckling load of PMMA hemispherical shells prepared via the free blow-forming process.

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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.