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Microindentation on Gelatin Films with a Spherical Indenter -- A Viscoelastic Analysis

Published online by Cambridge University Press:  15 February 2011

Beta Y. Ni ,
Gary R. Bisson  and
Andy H. Tsou
Beta Y. Ni
Affiliation:
Materials Science and Engineering Division, Eastman Kodak Company, Rochester, NY 14652
Gary R. Bisson
Affiliation:
Materials Science and Engineering Division, Eastman Kodak Company, Rochester, NY 14652
Andy H. Tsou
Affiliation:
Materials Science and Engineering Division, Eastman Kodak Company, Rochester, NY 14652
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Abstract

A finite element model was employed to analyze the microindentation test with a spherical indenter on gelatin films. The deficiency of using elastic-plastic constitutive law to describe indentation response of gelatin film was recognized and a viscoelastic model was proposed for the first time to analyze indentation experiments on polymeric materials. Based on viscoelastic analysis, it was found that gelatin is nonlinear viscoelastic. In addition, modulus in the thickness direction of a gelatin film was determined to be 2.5–2.9 GPa as compared with its tensile modulus of 4.6 GPa in the transverse direction.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 308: Symposium M1 – Thin Films: Stresses and Mechanical Properties IV , 1993 , 489
Copyright
Copyright © Materials Research Society 1993

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References

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