TY - JOUR

T1 - Combined damaged elasticity and creep modeling of ceramics with wedge splitting tests

AU - Samadi, S.

AU - Jin, S.

AU - Harmuth, H.

N1 - Funding Information: This work was supported by the funding scheme of the European Commission , Marie Skłodowska-Curie Actions Innovative Training Networks in the frame of the project ATHOR - Advanced THermomechanical multiscale modeling of Refractory linings 764987 Grant. Publisher Copyright: © 2021 The Author(s)

PY - 2021/9/15

Y1 - 2021/9/15

N2 - 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.

AB - 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.

KW - Creep

KW - Material constitutive model

KW - Mode I fracture

KW - Wedge splitting test

UR - http://www.scopus.com/inward/record.url?scp=85107543689&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2021.05.315

DO - 10.1016/j.ceramint.2021.05.315

M3 - Article

AN - SCOPUS:85107543689

VL - 47.2021

SP - 25846

EP - 25853

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

IS - 18

ER -