TY  - EJOU
AU  - Bednarcyk, Brett A.  
AU  - Yarrington, Phillip W.  
AU  - Arnold, Steven M.  

TI  - Multiscale Fatigue Life Prediction for Composite Panels
T2  - Computers, Materials \& Continua

PY  - 2013
VL  - 35
IS  - 3
SN  - 1546-2226

AB  - Fatigue life prediction capabilities have been incorporated into the HyperSizer Composite Analysis and Structural Sizing Software. The fatigue damage model is introduced at the fiber/matrix constituent scale through HyperSizer’s coupling with NASA’s MAC/GMC micromechanics software. This enables prediction of the micro scale damage progression throughout stiffened and sandwich panels as a function of cycles leading ultimately to simulated panel failure. The fatigue model implementation uses a cycle jumping technique such that, rather than applying a specified number of additional cycles, a specified local damage increment is specified and the number of additional cycles to reach this damage increment is calculated. In this way, the effect of stress redistribution due to damage-induced stiffness change is captured, but the fatigue simulations remain computationally efficient. The model is compared to experimental fatigue life data for two composite facesheet/foam core sandwich panels, demonstrating very good agreement.
KW  - 

DO  - 10.3970/cmc.2013.035.229