摘要：Under complex loading conditions, composite pipes are prone to progressive damage that may lead to complete structural failure. However, a rapid and accurate analysis method for such progressive damage has been lacking. This paper conducts systematic investigations into interlayer stress transfer mechanisms and structural load-bearing capacity reduction. A nonlinear three-dimensional (3D) theoretical model accounting for material stiffness degradation was developed to elucidate stress redistribution and stiffness deterioration processes during progressive damage, facilitating accurate prediction of ultimate load capacity. First, a theoretical model characterizing stress responses in composite pipe cross-sections was solved through consideration of boundary and interfacial constraints. The model＇s 3D stress field was validated through a case study involving an 8-inch composite pipe. Subsequently, the stress thresholds at failure, critical failure locations, dominant failure modes, and failure progression sequence were systematically analyzed. Finally, the ultimate load-bearing capacity was comprehensively investigated. Results demonstrate the theoretical model＇s accuracy while requiring merely one-hundredth of the computational time compared to numerical simulations. The study determined the first-layer failure pressure and burst pressure to be 29.1 MPa and 95.6 MPa, respectively. These findings establish theoretical foundations for composite pipe design and failure evaluation, highlighting their viability as alternatives to conventional metal pipes. ? 2025 Elsevier Ltd

ISSN号：0029-8018

卷、期、页：卷340子辑2

发表日期：2025-11-30

影响因子：0.000000

期刊分区（SCI为中科院分区）：二区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：Ocean Engineering

参与作者：李达

通讯作者：孙海波,贾鲁生,周翰宸,韩俊杰

第一作者：王莹莹

论文类型：期刊论文

论文概要：孙海波,王莹莹,李达,贾鲁生,周翰宸,韩俊杰，Nonlinear theoretical model for predicting the progressive damage of composite pipes in deep-sea mining，Ocean Engineering，2025，卷340子辑2

论文题目：Nonlinear theoretical model for predicting the progressive damage of composite pipes in deep-sea mining