The fatigue damage to polymers generally depends on the material properties as well as on the mechanical, thermal, chemical, and other environmental influences. In this article, a methodology for modeling the dependence of the PA66 S-N curves on the material parameters, the material state, and the operating conditions is presented. The core of the presented methodology is a multilayer perceptron neural network combined with an analytical model of the PA66 S-N curve. Such a hybrid approach simultaneously utilizes the good approximation capabilities of the multilayer perceptron and knowledge of the phenomenon under consideration, because the analytical model for the S-N curves was estimated on the basis of the existing experimental data from the literature. The article presents the theoretical background of the applied methodology. The applicability and uncertainty of the presented methodology were assessed for the available data from the literature. The results show that it was possible to approximate the PA66 S-N curves for different input parameters if the space of the input parameters was adequately covered by the corresponding S-N curves.
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July 2011
Research Papers
Modeling the S-N Curves of Polyamide PA66 Using a Serial Hybrid Neural Network
Andrej Wagner,
Andrej Wagner
Faculty of Mechanical Engineering, University of Ljubljana
, Askerceva 6, SI-1000 Ljubljana, Slovenia
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Matija Fajdiga
Matija Fajdiga
Faculty of Mechanical Engineering, University of Ljubljana
, Askerceva 6, SI-1000 Ljubljana, Slovenia
Search for other works by this author on:
Andrej Wagner
Faculty of Mechanical Engineering, University of Ljubljana
, Askerceva 6, SI-1000 Ljubljana, Slovenia
Matija Fajdiga
Faculty of Mechanical Engineering, University of Ljubljana
, Askerceva 6, SI-1000 Ljubljana, Slovenia
J. Eng. Mater. Technol. Jul 2011, 133(3): 031005 (14 pages)
Published Online: July 5, 2011
Article history
Received:
September 6, 2010
Revised:
April 6, 2011
Online:
July 5, 2011
Published:
July 5, 2011
Citation
Klemenc, J., Wagner, A., and Fajdiga, M. (July 5, 2011). "Modeling the S-N Curves of Polyamide PA66 Using a Serial Hybrid Neural Network." ASME. J. Eng. Mater. Technol. July 2011; 133(3): 031005. https://doi.org/10.1115/1.4004054
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