This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Bebamzadeh, A. Articles by Fernlund, G. Search for Related Content Social Bookmarking                         What's this?

Response Sensitivity and Parameter Importance in Composites Manufacturing

Department of Civil Engineering, University of British Columbia 6250 Applied Science Lane, Vancouver BC V6T 1Z4, Canada

T. Haukaas

Department of Civil Engineering, University of British Columbia 6250 Applied Science Lane, Vancouver BC V6T 1Z4, Canada, terje{at}civil.ubc.ca

R. Vaziri

Department of Civil Engineering, University of British Columbia 6250 Applied Science Lane, Vancouver BC V6T 1Z4, Canada

A. Poursartip

Department of Materials Engineering, University of British Columbia 6350 Stores Road, Vancouver BC V6T 1Z4, Canada

G. Fernlund

Department of Materials Engineering, University of British Columbia 6350 Stores Road, Vancouver BC V6T 1Z4, Canada

In this article we derive, implement, and verify equations to compute the sensitivity of responses from numerical simulation of composites manufacturing. The responses considered are part temperature and degree of cure, as well as process-induced deformation of the cured part. The `direct differentiation method' (DDM) is used, which entails a one-time investment of effort to differentiate the governing response equations analytically. The implementation of the derivative equations facilitates efficient and accurate computation of response sensitivities in all subsequent analyses. This article extends the DDM methodology developed earlier for mechanical problems. Novel `shape sensitivity' equations and efficient implementation techniques are also included. In order to verify the implementations, the model predictions are compared with those obtained from the less efficient finite difference approach. A comprehensive example is presented where the usefulness and interpretation of response sensitivities are emphasized. It is observed that the responses are particularly sensitive to certain model parameters, for which further data gathering and model improvement efforts should be focused.

Key Words: response sensitivity • composites manufacturing • direct differentiation method • thermochemical model • stress development model • cure kinetics.

Journal of Composite Materials, Vol. 43, No. 6, 621-659 (2009)
DOI: 10.1177/0021998308101299


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?