Computational methods for coupling microstructural and micromechanical materials response simulations

HOLM,ELIZABETH A. ; BATTAILE,CORBETT C. ; BUCHHEIT,THOMAS E. ; FANG,HUEI ELIOT ; RINTOUL,MARK DANIEL ; VEDULA,VENKATA R. ; GLASS,S. JILL ; KNOROVSKY,GERALD A. ; NEILSEN,MICHAEL K. ; WELLMAN,GERALD W. ; SULSKY,DEBORAH ; SHEN,YU-LIN ; SCHREYER,H. BUCK

Sandia National Laboratories

关键词: Mechanical Properties;    99 General And Miscellaneous//Mathematics, Computing, And Information Science;    Computer Codes;    36 Materials Science;    Crack Propagation;   

DOI  :  10.2172/755095
RP-ID  :  SAND2000-1015
RP-ID  :  AC04-94AL85000
RP-ID  :  755095

美国|英语

来源: UNT Digital Library

【 摘 要 】

Computational materials simulations have traditionally focused on individual phenomena: grain growth, crack propagation, plastic flow, etc. However, real materials behavior results from a complex interplay between phenomena. In this project, the authors explored methods for coupling mesoscale simulations of microstructural evolution and micromechanical response. In one case, massively parallel (MP) simulations for grain evolution and microcracking in alumina stronglink materials were dynamically coupled. In the other, codes for domain coarsening and plastic deformation in CuSi braze alloys were iteratively linked. this program provided the first comparison of two promising ways to integrate mesoscale computer codes. Coupled microstructural/micromechanical codes were applied to experimentally observed microstructures for the first time. In addition to the coupled codes, this project developed a suite of new computational capabilities (PARGRAIN, GLAD, OOF, MPM, polycrystal plasticity, front tracking). The problem of plasticity length scale in continuum calculations was recognized and a solution strategy was developed. The simulations were experimentally validated on stockpile materials.