Combined damaged elasticity and creep modeling of ceramics with wedge splitting tests
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In: Ceramics International, Vol. 47.2021, No. 18, 15.09.2021, p. 25846-25853.
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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 -