EJPAU 2007. Gładyszewska B. , Szczurowska I. , Chocyk D. “BROCADE” METHOD FOR DETERMINATION OF THE STRAIN TENSOR ELEMENTS OF THIN BIOLOGICAL MATERIALS

Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

2007
Volume 10
Issue 1

Topic:

Agricultural Engineering

ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES

Gładyszewska B. , Szczurowska I. , Chocyk D. 2007. “BROCADE” METHOD FOR DETERMINATION OF THE STRAIN TENSOR ELEMENTS OF THIN BIOLOGICAL MATERIALS, EJPAU 10(1), #09.
Available Online: http://www.ejpau.media.pl/volume10/issue1/abs-09.html

“BROCADE” METHOD FOR DETERMINATION OF THE STRAIN TENSOR ELEMENTS OF THIN BIOLOGICAL MATERIALS

Bożena Gładyszewska¹, Izabela Szczurowska¹, Dariusz Chocyk²
¹ Department of Physics, Agriculture University of Lublin, Poland
² Institute of Physics, Lublin University of Technology, Poland

ABSTRACT

In this paper a video-extensometer method for studying the mechanical properties of wet biological samples is presented. The method is based on the relationships between a unit elongation of linear element on the surface and strain tensor elements. The linear elements are represented by randomly deposited markers. The analysis of the changes of markers positions during uniaxial tension directly allows to determine the strain in thin coat layers. As a test case, the method was applied to analyze the strain of the dwarf bean (Phaseolus coccineus) seed coats. Young’s modulus and Poisson’s ratio were determined for different moisture content. Young’s modulus clearly decreases with increasing moisture content of the sample.

Key words: Strain tensor, Young’s modulus, Poisson’s ratio.

Bożena Gładyszewska
Department of Physics,
Agriculture University of Lublin, Poland
Akademicka 13, 20-033 Lublin, Poland
Phone: (+48 81) 445 69 19
email: bozena.gladyszewska@ar.lublin.pl

Izabela Szczurowska
Department of Physics,
Agriculture University of Lublin, Poland
Akademicka 13, 20-033 Lublin, Poland
Phone: (+48 81) 445 69 19
email: izabela.szczurowska@ar.lublin.pl

Dariusz Chocyk
Institute of Physics,
Lublin University of Technology, Poland
Nadbystrzycka 38, 20-618 Lublin, Poland
Phone: (+48 81) 538 15 08
email: d.chocyk@pollub.pl

Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.