Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/58017
Title: Computational aspects in creep rupture modelling of polypropylene using an energy failure criterion in conjunction with a mechanical model
Authors: Teoh, S.H. 
Keywords: creep rupture
mechanical model
non-linear regression
parameter optimization
polypropylene
Reiner-Weissenberg
resilience
stress limits
Issue Date: Dec-1990
Source: Teoh, S.H. (1990-12). Computational aspects in creep rupture modelling of polypropylene using an energy failure criterion in conjunction with a mechanical model. Polymer 31 (12) : 2260-2266. ScholarBank@NUS Repository.
Abstract: The creep rupture time of polypropylene (PP) was modelled successfully using the Reiner-Weissenberg energy criterion with a mechanical model. The computational aspects were discussed with respect to the software routine used, the equation relating time to rupture and stress, and the various problems associated with non-linear regression analysis for parameters optimization. The predicted upper stress limit for PP homopolymer and copolymer was 30 and 24 MPa, respectively. The predicted lower stress limit was 10 MPa and was independent of polymer type. Short term results can only be used to predict the stress limits if reasonable bounds were imposed on all the parameters. The above approach also predicted reasonable values for the resilience of polypropylene. © 1990.
Source Title: Polymer
URI: http://scholarbank.nus.edu.sg/handle/10635/58017
ISSN: 00323861
Appears in Collections:Staff Publications

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