A novel distribution function for modeling oxygen diffusion in functionally graded materials with cracks

被引：0

作者：

Lammert, Robert ^{[1
]}

Petrova, Vera E. ^{[1
]}

Weihe, Stefan ^{[1
]}

机构：

[1] MPA Univ Stuttgart, Pfaffenwaldring 32, D-70569 Stuttgart, Germany

来源：

ENGINEERING FRACTURE MECHANICS | 2025年 / 319卷

关键词：

Double bounded distribution; Median adjustment parameter; Functionally graded material (FGM); Oxygen diffusion; Fracture analysis; THERMAL-BARRIER COATINGS; NICKEL-BASED SUPERALLOY; OXIDATION; STRESS; GROWTH; DAMAGE; TEMPERATURE; FRACTURE; SHOCK;

D O I：

10.1016/j.engfracmech.2025.111006

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Oxygen diffusion in a functionally graded material (FGM) is modeled by an elastic modulus profile that covers the FGM and the thermally grown oxide (TGO) areas. The profile is based on a novel Gaussian-like distribution that becomes an adaptive weight function by scaling, shifting and using a (symmetry breaking) median adjustment parameter. The properties of this new type of distribution are analyzed and the pure FGM (no oxygen) is compared with the FGM+TGO scenario for a semi-infinite structure with three edge cracks. The fracture analysis is based on critical loads, determined for different crack distances and inclination angles.

引用

页数：17

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