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轴向压缩载荷作用下含倾斜贯穿裂纹圆柱壳的弹性及弹塑性屈曲载荷研究

Research on Elastic and Elastic-Plastic Buckling Load of Cylindrical Shell with an Inclined through Crack under Axial Compressive Load.

作者信息

Wang Zhuo-Wu, Tang Jian, Li Shou-Chao, He Xiao-Hua, Zhou Chang-Yu

机构信息

School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China.

Jiangsu Key Lab of Design and Manufacture of Extreme Pressure Equipment, Nanjing 211816, China.

出版信息

Materials (Basel). 2023 Sep 8;16(18):6123. doi: 10.3390/ma16186123.

DOI:10.3390/ma16186123
PMID:37763400
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10532547/
Abstract

By experimental methods, 26 specimens were designed to conduct elastic and elastic-plastic buckling tests on cylindrical shells containing cracks. This study discusses the influence of factors such as the length-diameter ratio, the diameter-thickness ratio, the crack length, the inclination of the crack, etc., on the buckling load. Additionally, finite element models were established to compare with experimental results. For the PMMA cylindrical shell, the results showed that as the length-diameter ratio of the cylindrical shell increased, the buckling load first decreased and then increased. For the 6063 aluminum alloy cylindrical shell, with increasing length-diameter ratio, diameter-thickness ratio, and crack length of the cylindrical shell, the buckling load decreased accordingly. However, concerning the crack inclination, as the crack inclination increased, the buckling load increased accordingly. This indicates that the larger the crack inclination, the higher the load capacity of the cylindrical shell containing cracks. Through finite element simulations of cylindrical shells with cracks, it was found that through compressive mechanical properties, both elastic and elastic-plastic buckling loads yielded results that are closer to the experimental results. Additionally, the inclusion of contact effects in numerical simulations further improved the agreement with the experimental results, and the variation trend of the buckling load in the finite element simulation was consistent with the experimental results. The research findings provide valuable references for the assessment of load capacity in structures containing cracks.

摘要

通过实验方法，设计了26个试件，对含裂纹圆柱壳进行弹性和弹塑性屈曲试验。本研究探讨了长径比、径厚比、裂纹长度、裂纹倾角等因素对屈曲载荷的影响。此外，建立了有限元模型与实验结果进行对比。对于聚甲基丙烯酸甲酯（PMMA）圆柱壳，结果表明，随着圆柱壳长径比的增加，屈曲载荷先减小后增大。对于6063铝合金圆柱壳，随着圆柱壳长径比、径厚比和裂纹长度的增加，屈曲载荷相应降低。然而，关于裂纹倾角，随着裂纹倾角的增加，屈曲载荷相应增加。这表明裂纹倾角越大，含裂纹圆柱壳的承载能力越高。通过对含裂纹圆柱壳的有限元模拟发现，通过压缩力学性能，弹性和弹塑性屈曲载荷的结果都更接近实验结果。此外，在数值模拟中考虑接触效应进一步提高了与实验结果的一致性，有限元模拟中屈曲载荷的变化趋势与实验结果一致。研究结果为含裂纹结构的承载能力评估提供了有价值的参考。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8673/10532547/c86ad6b97fd2/materials-16-06123-g018a.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8673/10532547/c86ad6b97fd2/materials-16-06123-g018a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8673/10532547/26f82be09ea3/materials-16-06123-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8673/10532547/e6c9383977d0/materials-16-06123-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8673/10532547/979e84acee13/materials-16-06123-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8673/10532547/7571416a228c/materials-16-06123-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8673/10532547/153e36918927/materials-16-06123-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8673/10532547/487c7427d232/materials-16-06123-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8673/10532547/8c2a84430e78/materials-16-06123-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8673/10532547/25083576aee2/materials-16-06123-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8673/10532547/18e7cfbc963c/materials-16-06123-g015.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8673/10532547/c86ad6b97fd2/materials-16-06123-g018a.jpg

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