Application of a depth sensing indentation hardness test to evaluate the mechanical properties of food materials

Date

2002-06-01

Author

Özkan, Necati
CHEN, XD

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A depth sensing indentation hardness test with an associated analysis is described as a convenient and simple technique for characterizing mechanical properties of food materials, such as hardness (H), elastic modulus (E), and an elasticity index (I-E) which represents the ratio of elastic to total deformation. Storage modulus (G) and loss tangent (tandelta) of the selected model food material, a whey protein concentrate (WPC) gel, have also been determined using an oscillatory dynamic testing. Fractal dimension (D) and strain rate (or frequency) exponent (n) of the WPC gels were determined using both the indentation and dynamic test results. A good correlation between the results from the indentation and the dynamic tests was established. The effects of protein concentration, deformation rate, and chemical treatment on the mechanical properties of the WPC gels were clearly illustrated using the indentation test.

Subject Keywords

Hardness, Elastic modulus, Indentation, Whey protein gels, Potato tissue, Rheology

URI

https://hdl.handle.net/11511/30291

Journal

JOURNAL OF FOOD SCIENCE

DOI

https://doi.org/10.1111/j.1365-2621.2002.tb08728.x

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

N. Özkan and X. CHEN, “Application of a depth sensing indentation hardness test to evaluate the mechanical properties of food materials,” JOURNAL OF FOOD SCIENCE, pp. 1814–1820, 2002, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30291.