A comparison of two damage models for inverse identification of mode I fracture parameters: Case study of a refractory ceramic
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in: International Journal of Mechanical Sciences, Jahrgang 197, Nr. 1 May, 106345, 01.05.2021.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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TY - JOUR
T1 - A comparison of two damage models for inverse identification of mode I fracture parameters: Case study of a refractory ceramic
AU - Samadi, Soheil
AU - Jin, Shengli
AU - Gruber, Dietmar
AU - Harmuth, Harald
N1 - Publisher Copyright: © 2021
PY - 2021/5/1
Y1 - 2021/5/1
N2 - Fracture behavior of refractories influences their durability in high-temperature applications to a great extent. The fictitious crack model has been used for simulation of the fracture process of refractories and concrete materials. The present study investigates the effect of the lower post-failure stress limit of the softening law in the fictitious crack model by comparing an in-house developed subroutine for damaged elasticity model with the concrete damaged plasticity model implemented in Abaqus. The numerical wedge splitting tests show that in the case of brittle materials, the lower post-failure stress limit defined in the concrete damaged plasticity model resulted in energy consumption for crack propagation exceeding the defined fracture energy (114% higher in the case of a brittleness number of 4.4). Therefore, the developed damaged elasticity model allows for a more accurate simulation of fracture since the lower post-failure stress limit was decreased to 0.0001% of the tensile strength. Moreover, an inverse evaluation of the fracture parameters of an alumina spinel refractory material supported the developed model.
AB - Fracture behavior of refractories influences their durability in high-temperature applications to a great extent. The fictitious crack model has been used for simulation of the fracture process of refractories and concrete materials. The present study investigates the effect of the lower post-failure stress limit of the softening law in the fictitious crack model by comparing an in-house developed subroutine for damaged elasticity model with the concrete damaged plasticity model implemented in Abaqus. The numerical wedge splitting tests show that in the case of brittle materials, the lower post-failure stress limit defined in the concrete damaged plasticity model resulted in energy consumption for crack propagation exceeding the defined fracture energy (114% higher in the case of a brittleness number of 4.4). Therefore, the developed damaged elasticity model allows for a more accurate simulation of fracture since the lower post-failure stress limit was decreased to 0.0001% of the tensile strength. Moreover, an inverse evaluation of the fracture parameters of an alumina spinel refractory material supported the developed model.
KW - Damaged elasticity
KW - Finite element analysis
KW - Wedge splitting test
KW - Ceramics
UR - http://www.scopus.com/inward/record.url?scp=85101130239&partnerID=8YFLogxK
U2 - https://doi.org/10.1016/j.ijmecsci.2021.106345
DO - https://doi.org/10.1016/j.ijmecsci.2021.106345
M3 - Article
VL - 197
JO - International Journal of Mechanical Sciences
JF - International Journal of Mechanical Sciences
SN - 0020-7403
IS - 1 May
M1 - 106345
ER -