journal article

Journal Article

Text

AIP Advances. 2023, 13(12), p. 125024

Influence of elastic anisotropy on the shapes of ellipsoidal blisters and stress field around the blisters in solid materials

Ishii, Akio

AIP Publishing

Text

2023-12-28

https://doi.org/10.1063/5.0182632

Ishii Akio. Influence of elastic anisotropy on the shapes of ellipsoidal blisters and stress field around the blisters in solid materials. AIP Advances 13, 125024 (2023); https://doi.org/10.1063/5.0182632.

To address the embrittlement challenges posed by gas blisters in anisotropic materials, the stable shape of constant-pressure blisters in anisotropic materials (hexagonal, tetragonal, and rhombohedral) was energetically investigated based on continuum theory (micromechanics), considering the blister as Eshelby’s ellipsoidal inclusion. The non-negligible change in the blister shape was confirmed in terms of the anisotropic factor η ≡ C3333/C1111. Although the spherical shape of the blister is preferable for isotropic and cubic materials (η = 1), the x3 normal penny and capsule shapes were theoretically confirmed to be the most stable ones for η > 1 and η < 1, respectively. The penny and capsule shape blisters generate larger stress fields around themselves than the sphere shape blisters, thus inducing crack formation. The embrittlement due to the gas (typically hydrogen or helium) inside the blister for the anisotropic materials was more significant than isotropic and cubic embrittlement.

This article is licensed under a Creative Commons Attribution 4.0 International License.

93376

Influence of elastic anisotropy on the shapes of ellipsoidal blisters and stress field around the blisters in solid materials

Ishii, Akio

AIP Publishing

2023-12-28

AIP Advances

13

12

125024

https://doi.org/10.1063/5.0182632

https://hdl.handle.net/11094/93376