Begley, Mathew R.

Lim, Rone Kwei

Petzold, Linda

Pro, William

English

Engineering Conferences International

Engineering Conferences InternationalECI Digital ArchivesThermal Barrier Coatings IV ProceedingsSummer 6-26-2014Simulations of fracture in coatings with complexmicrostructuresMathew R. BegleyMaterials Department, UCSB, begley@engineering.ucsb.eduWilliam ProMaterials Department, UCSBRone Kwei LimElectrical and Computer Engineering, UCSBLinda PetzoldElectrical and Computer Engineering, UCSBFollow this and additional works at: http://dc.engconfintl.org/thermal_barrier_ivPart of the Materials Science and Engineering CommonsThis Conference Proceeding is brought to you for free and open access by the Proceedings at ECI Digital Archives. It has been accepted for inclusion inThermal Barrier Coatings IV by an authorized administrator of ECI Digital Archives. For more information, please contact franco@bepress.com.Recommended CitationMathew R. Begley, William Pro, Rone Kwei Lim, and Linda Petzold, "Simulations of fracture in coatings with complexmicrostructures" in "Thermal Barrier Coatings IV", U. Schulz, German Aerospace Center; M. Maloney, Pratt & Whitney; R. Darolia,GE Aviation (retired) Eds, ECI Symposium Series, (2015). http://dc.engconfintl.org/thermal_barrier_iv/37Thursday, June 26, 2014  Session 5 SIMULATIONS OF FRACTURE IN COATINGS WITH COMPLEX MICROSTRUCTURES  Mathew R. Begley, Materials Department, UCSB begley@engineering.ucsb.edu  William Pro, Mechanical Engineering, UCSB Rone Kwei Lim, Electrical and Computer Engineering, UCSB Linda Petzold, Electrical and Computer Engineering, UCSB  Key Words: fracture, simulation, cohesive elements, parallelization  This talk will describe simulations of fracture based on discrete element formulations, which are designed to predict failure without assumptions regarding damage modality (e.g. delamination versus channel cracking). The goal is to quantify connections between active failure modes and microstructural properties and features, such as columnar architectures, oxide rumples or regions with CMAS infiltration. The computational tool incorporates cohesive elements at every single interface formed between continuum elements, thus allowing for arbitrary crack paths to emerge as a consequence of local stresses. The method reduces to conventional linear elastic fracture mechanics in the limit of large crack length relative to the cohesive zone size, with an intrinsic toughness  Explicit time stepping is used to avoid convergence issues associated with implicit methods, provide a natural pathway to incorporate rate-dependence, and enable high degrees of parallelization. The talk will provide a number of illustrative simulations, and outline their implications regarding the scaling of computational expense with various material features, with an emphasis on the potential gains afforded by GPU parallelization.   

Simulations of fracture in coatings with complex microstructures

https://dc.engconfintl.org/cgi/viewcontent.cgi?article=1036&amp;context=thermal_barrier_iv

Simulations of fracture in coatings with complex microstructures

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Engineering Conferences International