This title appears in the Scientific Report :
2006
Please use the identifier:
http://dx.doi.org/10.1016/j.engfracmech.2005.12.001 in citations.
A hybrid method to assess interface debonding by finite fracture mechanics
A hybrid method to assess interface debonding by finite fracture mechanics
Adhesive connections are potentially weak locations in many kinds of engineering structures. Since adhesive joints can be regarded locally as bimaterial notches, the assessment of the hazard of crack nucleation, initiation and propagation in the vicinity of bimaterial notches and the reliability of...
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Personal Name(s): | Müller, A. |
---|---|
Becker, W. / Stolten, D. / Hohe, J. | |
Contributing Institute: |
Energieverfahrenstechnik; IWV-3 JARA-ENERGY; JARA-ENERGY Jülich-Aachen Research Alliance - Simulation Sciences; JARA-SIM |
Published in: | Engineering fracture mechanics, 73 (2006) S. 994 - 1008 |
Imprint: |
Kidlington
Elsevier Science
2006
|
Physical Description: |
994 - 1008 |
DOI: |
10.1016/j.engfracmech.2005.12.001 |
Document Type: |
Journal Article |
Research Program: |
Rationelle Energieumwandlung |
Series Title: |
Engineering Fracture Mechanics
73 |
Subject (ZB): | |
Publikationsportal JuSER |
Adhesive connections are potentially weak locations in many kinds of engineering structures. Since adhesive joints can be regarded locally as bimaterial notches, the assessment of the hazard of crack nucleation, initiation and propagation in the vicinity of bimaterial notches and the reliability of the junctions is an important problem. An essential requirement in this context is a sufficient criterion for crack nucleation. The present contribution proposes a modified approach based on Leguillon's hypothesis in order to provide a feasible criterion. A crack at a notch is assumed to be initiated and to grow if and only if both the released energy and the local stresses exceed critical values. Thus, simulating virtual crack growth along an interface of two dissimilar bonded materials, the integrity of the bond is revisable. The approach enables the determination of characteristic lengths for freshly nucleated cracks forming the base for any further integrity assessment. As an example, the concept is applied to the analysis of an adhesive bond of metallic and ceramic materials under severe thermal loading conditions as they occur, among other examples, in high temperature fuel cell technology. It is shown that the failure hazard of the adhesive joint can be reduced significantly by an appropriate local design. (c) 2005 Elsevier Ltd. All rights reserved. |