Elastic Parameters Measurement of Rubber by Digital Image Correlation

Abstract:

Application of Digital image correlation method (DIC) to measure the elastic modulus and Poisson ratio of rubber under compression is investigated in this paper. Surface images of the rubber surface subjected to various loading were captured using a CCD camera. DIC is subsequently used to obtain displacement field by correlating the images captured before and after deformation, and then the average compression strain is obtained by fitting the displacement using linear plane. The slope of each set of applied stress versus measured strain data is calculated by least-squares linear regression. The elastic modulus and Poisson ratio obtained from DIC, are compared to that determined from the dial gauge, which shows that they are in good accordance with existing data. Experimental results clearly show that DIC is suitable for accurate measurement the elastic modulus of rubber.

• Periodical: Applied Mechanics and Materials (Volumes 444-445)
• Pages: 1532-1535
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.444-445.1532
• Online since: October 2013
• Authors: Rui Zhang
• Keywords: Digital Image Correlation (DIC), Displacement, Elastic Modulus, Rubber, Strain

References

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[2] ASTM D 412-98a, Standard Test Methods for Rubber Properties in Tension.

[3] ASTM D 575-91（96）, Standard Test Methods for Rubber Properties in Compression[S].

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DOI: 10.5254/1.3542705