Abstract
This research presents the results obtained from investigation of creep behavior for polyester resin composited with different volume fractions of fiber E-glass(roving) and carbon black powder under 4-point flexure test at ambient and 60ºC. Flexure strength of W.R. composites show best values in comparison to particulate C.B. composites or to mixed W.R./C.B. composites.
The creep strain measured up to 103 h for three different stresses namely 15,30 and 45 MPa shows that W.R. composites endures least strain of all other specimens. The 60ºC temperature has little effect on the creep strain, at this temperature the creep strain increases by about 8% for the prepared specimens. Plot of creep modulus vs. time shows that the characteristic behavior is reciprocal of creep strain. Prior immersion in water to specimens for 30 days reveal that creep strain progressively increased for all prepared composites.
Full text article
Authors
Copyright (c) 2013 Gelass M. Jamal, Harith i. Jafaar, Nabil N. Rammo

This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License [CC BY-NC-SA 4.0] that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work, with an acknowledgment of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online.