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International Journal for Multiscale Computational Engineering
IF: 1.016 5-Year IF: 1.194 SJR: 0.452 SNIP: 0.68 CiteScore™: 1.18

ISSN Print: 1543-1649
ISSN Online: 1940-4352

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.v5.i6.10
pages 435-446

A Multiscale Design System for Fatigue Life Prediction

Erez Gal
Department of Structural Engineering, Ben-Gurion University, Beer-Sheva, 84105, Israel
Zheng Yuan
Multiscale Design Systems LLC, 280 Park Ave, Apt 22M, New York, NY 10010, U.S.A.
Wei Wu
Rensselaer Polytechnic Institute
Jacob Fish
Civil Engineering and Engineering Mechanics, Columbia University, New York, New York 10027, USA

ABSTRACT

We present a multiscale design system (MDS) for fatigue life prediction of composite materials and structures. The system is based on the reduced order spatial homogenization, adaptive cycle block integration, and identification of fine-scale material parameters from experimental data. Fatigue is modeled as a multiscale space-time problem. The reduced order homogenization is used for spatial upscaling (or coarse graining). The cycle block scheme, which estimates the rate of material degradation from a single load cycle and then adaptively projects it over n cycles, is used for temporal upscaling. The MDS has been seamlessly integrated in ABAQUS, and a graphical user interface has been developed.


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