Combined damaged elasticity and creep modeling of ceramics with wedge splitting tests

S. Samadi, S. Jin, H. Harmuth

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung

2 Zitate (Scopus)

Abstract

During the crack propagation in common refractory ceramics at high temperatures, creep may occur in the wake of a process zone and in front of a crack tip. To account for this phenomenon, an integrated material constitutive model was developed by combining the mechanical behavior following isotropic damaged elasticity concept and Norton-Bailey creep. The post peak fracture behavior followed the bilinear softening law and a simple criterion was defined to consider the creep asymmetricity in uniaxial tension and compression. The material constitutive model was applied to inversely identify mode I fracture parameters with wedge splitting tests of an alumina spinel material at 1200 °C. It showed that the mean ratio of the nominal notch tensile strength to the actual tensile strength was 1.93 and the mean pure fracture energy was 297.6 N/m. In addition, the creep contributed 12.9% on average into the total fracture energy.
OriginalspracheEnglisch
Seiten (von - bis)25846-25853
Seitenumfang8
FachzeitschriftCeramics International
Jahrgang47.2021
Ausgabenummer18
Frühes Online-Datum2 Juni 2021
DOIs
PublikationsstatusVeröffentlicht - 15 Sept. 2021

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