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<p>As a novel meshless method, the Peridynamic Differential Operator (PDDO) method has distinct advantages in naturally handling discontinuous problems. In this study, it is further extended to investigate thermoelastic fracture problems in two-dimensional (2D) orthotropic materials. The stress intensity factors (SIFs) at crack tips are evaluated by using an interaction integral. A modified maximum circumferential stress criterion is applied to determine the crack propagation direction. Then, the meshless PDDO is employed to simulate crack propagation paths in some 2D structures with various geometric configurations under coupled thermo-mechanical loadings. The present results are compared with the existing numerical results to validate its effectiveness and high accuracy in computing the SIFs and simulating crack propagation paths.</p>

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Analysis of thermoelastic crack problems in two-dimensional orthotropic materials by PDDO method

  • 期刊论文

  • 发表日期：

    2026年3月31日

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  • Jun Lei,
  • Yong Lu,
  • Yanpeng Gong,
  • Weihui Hu

摘要

As a novel meshless method, the Peridynamic Differential Operator (PDDO) method has distinct advantages in naturally handling discontinuous problems. In this study, it is further extended to investigate thermoelastic fracture problems in two-dimensional (2D) orthotropic materials. The stress intensity factors (SIFs) at crack tips are evaluated by using an interaction integral. A modified maximum circumferential stress criterion is applied to determine the crack propagation direction. Then, the meshless PDDO is employed to simulate crack propagation paths in some 2D structures with various geometric configurations under coupled thermo-mechanical loadings. The present results are compared with the existing numerical results to validate its effectiveness and high accuracy in computing the SIFs and simulating crack propagation paths.