TY - GEN
T1 - Oxidation and cracking modeling in hybrid composites
AU - Iarve, Endel V.
AU - Zhou, Eric G.
AU - Tandon, G. P.
AU - Whitney, Thomas
AU - Breitzman, Timothy D.
AU - Mollenhauer, David H.
AU - Bechel, Vernon
AU - Pochiraju, Kishore
PY - 2011
Y1 - 2011
N2 - The mesh independent crack (MIC) framework is used to predict the length and size distribution of random cracking in a unidirectional GE30-500/PMR15 composite as a function of oxidation time and temperature. The MIC framework is based on a regularized extended finite element formulation, in which the Gaussian integration schema is preserved regardless of the enrichment required to model cracking in an arbitrary direction. The representative volume element micromechanics approach was used to perform hierarchical prediction of ply level stiffness, strength and fracture toughness properties both in the pristine and oxidized states based on respective constitutive properties of the fiber and resin. The oxidation layer thickness is inserted in the model based on experimental data. The transverse cracking length is consistent with the experimental measurement up to approximately 1600 hours of exposure and appears to exceed the test values for higher exposure times. Coupled fracture mechanics and diffusion reaction modeling approach is required to extend the model capabilities. Integration of the high-fidelity graded morphology prediction and MIC fracture modeling approaches is the objective of future work.
AB - The mesh independent crack (MIC) framework is used to predict the length and size distribution of random cracking in a unidirectional GE30-500/PMR15 composite as a function of oxidation time and temperature. The MIC framework is based on a regularized extended finite element formulation, in which the Gaussian integration schema is preserved regardless of the enrichment required to model cracking in an arbitrary direction. The representative volume element micromechanics approach was used to perform hierarchical prediction of ply level stiffness, strength and fracture toughness properties both in the pristine and oxidized states based on respective constitutive properties of the fiber and resin. The oxidation layer thickness is inserted in the model based on experimental data. The transverse cracking length is consistent with the experimental measurement up to approximately 1600 hours of exposure and appears to exceed the test values for higher exposure times. Coupled fracture mechanics and diffusion reaction modeling approach is required to extend the model capabilities. Integration of the high-fidelity graded morphology prediction and MIC fracture modeling approaches is the objective of future work.
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M3 - Conference contribution
AN - SCOPUS:80052073928
SN - 9781934551110
T3 - International SAMPE Technical Conference
BT - 2011 SAMPE Spring Technical Conference and Exhibition - State of the Industry
T2 - 2011 SAMPE Spring Technical Conference and Exhibition - State of the Industry: Advanced Materials, Applications, and Processing Technology
Y2 - 23 May 2011 through 26 May 2011
ER -