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<p>This study involves computer simulations and finite-element analyses of the stress–strain state of thin elastic plates and cylindrical shells weakened by a circular hole and reinforced by an annular inclusion made of a functionally graded material. Over one hundred configurations of the FGM inclusions of various sizes and mechanical properties have been analyzed to evaluate the influence of the inclusion geometry and the modulus variation law on the concentration of parameters of the stress–strain state of plates and shells around the hole. The resulting distributions of stress and strain intensity in zones of local stress concentration have been determined, and optimal parameters for the geometry and elastic properties of radially inhomogeneous FGM inclusions have been identified. These parameters have enabled a significant reduction in the stress concentration factor.</p>

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Methods for Reducing Stress Concentration Around Holes in Thin Plates and Cylindrical Shells with Annular Radially Inhomogeneous Inclusions

  • 期刊论文

  • 发表日期：

    2025年5月1日

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  • E. L. Hart,
  • B. I. Terokhin

摘要

This study involves computer simulations and finite-element analyses of the stress–strain state of thin elastic plates and cylindrical shells weakened by a circular hole and reinforced by an annular inclusion made of a functionally graded material. Over one hundred configurations of the FGM inclusions of various sizes and mechanical properties have been analyzed to evaluate the influence of the inclusion geometry and the modulus variation law on the concentration of parameters of the stress–strain state of plates and shells around the hole. The resulting distributions of stress and strain intensity in zones of local stress concentration have been determined, and optimal parameters for the geometry and elastic properties of radially inhomogeneous FGM inclusions have been identified. These parameters have enabled a significant reduction in the stress concentration factor.