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01-07-2020 | Original Article

Maximum tensile stress and strain of skin of the domestic pig—differences concerning pigs from organic and non-organic farming

Authors: Sylvia Schick, Miriam Leiderer, Felicitas Lanzl, Matthias Graw, Steffen Peldschus

Published in: International Journal of Legal Medicine | Issue 4/2020

Abstract

The purpose of this work has been to determine differences in biomechanical properties of porcine skin from organic and non-organic farming as porcine skin is widely used as a model for human skin. A test apparatus was used, using gravity to stretch and finally tear a dumbbell-shaped specimen of prepared abdominal skin with a testing surface area of 25 × 4 mm. A total of 32 specimens were taken from seven individual pigs, three from organic and four from non-organic farming, in different orientations with respect to the Langer’s lines. The tests were performed at a dynamic speed of around 1.66 m/s (corresponding to a nominal strain rate of 67 s⁻¹). Engineering strain at rupture was higher in pig skin from non-organic farming with values up to 321% as opposed to 90% in organic pig skin. The maximum tensile stress found in non-organic pig skin was lower than in pig skin from organic farming with maximum values of 34 MPa as opposed to 58 MPa. The reason for the difference in biomechanical properties is unclear; the effect of sunlight is discussed as well as other factors like age and exercise. It seems that the biomechanical properties of porcine skin from organic farming are more similar to those of human skin.

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Title: Maximum tensile stress and strain of skin of the domestic pig—differences concerning pigs from organic and non-organic farming
Authors: Sylvia Schick
Miriam Leiderer
Felicitas Lanzl
Matthias Graw
Steffen Peldschus
Publication date: 01-07-2020
Publisher: Springer Berlin Heidelberg
Published in: International Journal of Legal Medicine / Issue 4/2020
Print ISSN: 0937-9827
Electronic ISSN: 1437-1596
DOI: https://doi.org/10.1007/s00414-019-02207-w

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Maximum tensile stress and strain of skin of the domestic pig—differences concerning pigs from organic and non-organic farming

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