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Polymeric solids have tensile creep compliance, compression creep compliance, flexural creep compliance, and tangential or incremental tensile and compressive compliance. While these compliance values would all be numerically the same in a given metal, they will all be numerically distinct in polymeric solids. This paper investigates why these compliance values vary in polymeric solids and presents experimental data to indicate the magnitude of this variation between several of these compliance values in iso-polyesters and vinylesters. The tensile creep compliance is found to be ∼15% greater than the flexural creep compliance in vinylesters while the incremental compliance at 3700 hours in a creep test is found to be approximately 25% less than the initial compliance on loading for iso-polyesters. The measured tensile and flexural creep compliances may be used to calculate the compressive creep compliance.
tensile creep compliance, flexural creep compliance, tangential or incremental compliance, compressive creep compliance, vinylesters, polyesters
Materials Performance, Inc., College Station, TX
Texas A&M University, College Station, TX
Dow Chemical, Freeport, TX