Theoretical study on 3D elastic response and first layer failure strength of composite cylinders subjected to axisymmetric loadings

IF 3 2区 工程技术 Q2 ENGINEERING, MECHANICAL International Journal of Pressure Vessels and Piping Pub Date : 2024-06-25 DOI:10.1016/j.ijpvp.2024.105245
Fuwei Gu , Hao Wang , Zhongliang Cao , Jiawen Qi , Pei Zhang , Xinkun Wang , Guoliang Ma
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Abstract

The traditional Lekhnitskii 3D elastic theory can obtain the exact stress and strain response of the composite cylinder under the axially symmetric loadings. However, when the cylinder contains 0° winding layers or isotropic layers, some calculation parameters corresponding to the two kinds of special layers will become singular. By analyzing the continuity of singular parameters and calculating their limits, the problem of singular parameters can be effectively solved and the Lekhnitskii theory can be extended to composite thick-walled cylinders with arbitrary winding angles. Furthermore, based on the Chang-Chang strength criterion of composite layers and the ideal elastic-plastic assumption of isotropic metal layers, the theoretical calculation method of first layer failure strength and the corresponding failure modes of the composite cylinders subjected to axisymmetric loadings was proposed. Then, the composite cylinder with metal liner was fabricated by fiber winding process. The experimental blasting pressure of the cylinder was 52.8 MPa with a major failure mode of fiber tensile fracture. Based on the proposed theoretical method, the cylinder's first layer failure strength of internal pressure was 44.1 MPa, and the initial failure mode was also fiber tensile fracture. The predicted result of the first layer failure strength was lower than the experimental results. The result proved the safety and economy of the proposed theoretical method for the initial design of the composite cylinder.

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受轴对称载荷作用的复合材料圆柱体的三维弹性响应和第一层破坏强度的理论研究
传统的 Lekhnitskii 三维弹性理论可以获得复合材料圆柱体在轴对称载荷作用下的精确应力和应变响应。然而,当圆柱体包含 0° 缠绕层或各向同性层时,与这两种特殊层相对应的某些计算参数会变得奇异。通过分析奇异参数的连续性并计算其极限,可以有效解决奇异参数问题,并将 Lekhnitskii 理论扩展到任意缠绕角的复合厚壁圆柱体。此外,基于复合材料层的张长强度准则和各向同性金属层的理想弹塑性假设,提出了复合材料圆柱体在轴对称载荷作用下第一层破坏强度和相应破坏模式的理论计算方法。然后,采用纤维缠绕工艺制作了带金属内衬的复合材料圆筒。该圆柱体的实验爆破压力为 52.8 MPa,主要失效模式为纤维拉伸断裂。根据提出的理论方法,筒体第一层内压破坏强度为 44.1 MPa,初始破坏模式也是纤维拉伸断裂。第一层破坏强度的预测结果低于实验结果。该结果证明了所提出的理论方法在复合材料圆筒初始设计中的安全性和经济性。
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来源期刊
CiteScore
5.30
自引率
13.30%
发文量
208
审稿时长
17 months
期刊介绍: Pressure vessel engineering technology is of importance in many branches of industry. This journal publishes the latest research results and related information on all its associated aspects, with particular emphasis on the structural integrity assessment, maintenance and life extension of pressurised process engineering plants. The anticipated coverage of the International Journal of Pressure Vessels and Piping ranges from simple mass-produced pressure vessels to large custom-built vessels and tanks. Pressure vessels technology is a developing field, and contributions on the following topics will therefore be welcome: • Pressure vessel engineering • Structural integrity assessment • Design methods • Codes and standards • Fabrication and welding • Materials properties requirements • Inspection and quality management • Maintenance and life extension • Ageing and environmental effects • Life management Of particular importance are papers covering aspects of significant practical application which could lead to major improvements in economy, reliability and useful life. While most accepted papers represent the results of original applied research, critical reviews of topical interest by world-leading experts will also appear from time to time. International Journal of Pressure Vessels and Piping is indispensable reading for engineering professionals involved in the energy, petrochemicals, process plant, transport, aerospace and related industries; for manufacturers of pressure vessels and ancillary equipment; and for academics pursuing research in these areas.
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