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<p>We perform computer simulations and finite-element analysis of the stress-strain state of thin plates and thin-walled cylindrical shells weakened by a circular hole in the presence of an annular inclusion surrounding the hole and made of a functionally graded material (FGM). We study the influence of sizes of the FGM inclusions and the regularities of changes in the modulus of elasticity of FGM on the concentration of the parameters of the stress-strain state of plates and shells in the vicinity of the hole. The distributions of the stress and strain intensities in the zones of local stress concentration are determined. It is shown that, by introducing a radially inhomogeneous FGM inclusion with certain mechanical properties, it is possible to make the stress concentration factor lower by more than 50%.</p>

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Finite-Element Analysis of Stress Concentration in Thin Plates and Cylindrical Shells with a Circular Hole Surrounded by an Inclusion of Functionally Graded Material

  • 期刊论文

  • 发表日期：

    2025年7月26日

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  • E. L. Hart,
  • B. I. Terokhin

摘要

We perform computer simulations and finite-element analysis of the stress-strain state of thin plates and thin-walled cylindrical shells weakened by a circular hole in the presence of an annular inclusion surrounding the hole and made of a functionally graded material (FGM). We study the influence of sizes of the FGM inclusions and the regularities of changes in the modulus of elasticity of FGM on the concentration of the parameters of the stress-strain state of plates and shells in the vicinity of the hole. The distributions of the stress and strain intensities in the zones of local stress concentration are determined. It is shown that, by introducing a radially inhomogeneous FGM inclusion with certain mechanical properties, it is possible to make the stress concentration factor lower by more than 50%.