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.
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页数：17
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