Publication detail

Experimental-Computational analysis of Cohesion Tests

BURŠA, J.

Original Title

Experimental-Computational analysis of Cohesion Tests

English Title

Experimental-Computational analysis of Cohesion Tests

Type

conference paper

Language

en

Original Abstract

The paper compares various types of cohesion tests used in testing of adhesive connection of two materials. The computational modelling using FEM confirms that all the usual or normalized cohesion strength tests result in a pronounced stress concentration in some part of the contact surface of both materials. This concentration disables any evaluation of limit values of quantities crucial for decohesion of the materials and the tests differing in a single geometric parameter of the test sample cannot be compared. The authors suggest torsion tests as more convenient for cohesion strength tests. The computational simulation of the test using hyperelastic FEA showed, that no stress concentration occurs in this type of test and the stress state is homogeneous on all the contact surface. This fact enables a simple evaluation of shear stress in the test. The evaluated limit shear stress should be the material characteristic of the cohesion strength. Some few examples were realized to verify this tests.

English abstract

The paper compares various types of cohesion tests used in testing of adhesive connection of two materials. The computational modelling using FEM confirms that all the usual or normalized cohesion strength tests result in a pronounced stress concentration in some part of the contact surface of both materials. This concentration disables any evaluation of limit values of quantities crucial for decohesion of the materials and the tests differing in a single geometric parameter of the test sample cannot be compared. The authors suggest torsion tests as more convenient for cohesion strength tests. The computational simulation of the test using hyperelastic FEA showed, that no stress concentration occurs in this type of test and the stress state is homogeneous on all the contact surface. This fact enables a simple evaluation of shear stress in the test. The evaluated limit shear stress should be the material characteristic of the cohesion strength. Some few examples were realized to verify this tests.

RIV year

2002

Released

13.05.2002

Publisher

Institute of Mechanics of Solids Faculty of Mechanical Engineering Brno University of Technology

Location

Svratka, ČR

ISBN

80-214-2109-6

Book

Inženýrská mechanika 2002 Engineering Mechanics 2002

Pages from

13

Pages to

14

Pages count

2

Documents

BibTex


@inproceedings{BUT10205,
  author="Jiří {Burša}",
  title="Experimental-Computational analysis of Cohesion Tests",
  annote="The paper compares various  types of cohesion tests used in testing of adhesive connection of two materials. The computational modelling using FEM confirms that all the usual or normalized cohesion strength tests  result in a pronounced stress concentration in some part of the contact surface of both materials. This concentration disables any evaluation of limit values of  quantities crucial for decohesion of the materials and the tests differing in a single geometric parameter of the test sample cannot be compared.  The authors suggest  torsion tests as more convenient for cohesion strength tests. The computational simulation of the test using hyperelastic FEA showed, that no stress concentration occurs in this type of test and the stress state is homogeneous on all the contact surface. This fact enables a simple evaluation of shear stress in the test. The evaluated limit shear stress should be the material characteristic of the cohesion strength. Some few examples were realized to verify this tests.",
  address="Institute of Mechanics of Solids
Faculty of Mechanical Engineering
Brno University of Technology",
  booktitle="Inženýrská mechanika 2002 Engineering Mechanics 2002",
  chapter="10205",
  institution="Institute of Mechanics of Solids
Faculty of Mechanical Engineering
Brno University of Technology",
  year="2002",
  month="may",
  pages="13",
  publisher="Institute of Mechanics of Solids
Faculty of Mechanical Engineering
Brno University of Technology",
  type="conference paper"
}