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The von mises plastically deformed enclave as heat source for running cracks
This item is provided by the institution :
National Technical University of Athens
Repository :
Digital Library of National Technical University of Athens | Dspace@NTUA
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ΕΚΤ item type
Journal part
(EN)
Scientific article
(EN)
EKT year
1992
(EN)
EKT historical period
Title
The von mises plastically deformed enclave as heat source for running cracks (EN)
Creator
Kourkoulis, SK (EN)
Theocaris, PS (EN)
Andrianopoulos, NP (EN)
Description
All existing models interrelating crack propagation characteristic properties with heat exchange in zones around the crack tips simulate the heat production area by simple geometrical forms, like circles or squares. They assume also constant heat production rates over the whole area or the source. Contrariwise, the model introduced in the present study is based on two improved and more realistic assumptions concerning the shape and dimensions of the heat source and the spatial distribution of heat production density inside the heat source. These assumptions, together with Roscnthal's moving-point-source solution, yield a reasonable and improved model for a fast and rather simple numerical approach, whose results are in agreement with existing experimental evidence. The method was applied to two different materials, one polymer (polycarbonate) and the other metal (aluminum alloy) and their results appear to he compatible with reality and concordant with respective experiments In addition, the method was applied to relatively high crack propagation velocities revealing the existence of two symmetric off-axis temperat lire extrema in cither side of the crack propagation axis. This behavior may be directly relaled lo the phenomenon of crack branching. where similar maxima of energies and directions of branching are systematically observed at the same velocities. © 1991. (EN)
Type
journalArticle (EN)
Subject
FRACTURE (EN)
Mechanics (EN)
TIP (EN)
Provider
National Technical University of Athens
Repository / collection
Digital Library of National Technical University of Athens | Dspace@NTUA
Subcollections
Κεντρική Βιβλιοθήκη Ε.Μ.Π.
Ιδρυματικό Αποθετήριο
Δημοσιεύσεις μελών Δ.Ε.Π. σε περιοδικά
Journal
International Journal of Solids and Structures (EN)
Language
English
Issued
1992 (EN)
Identifier
http://hdl.handle.net/123456789/10841
ISI:A1992GM38700004 (EN)
187 (EN)
2 (EN)
29 (EN)
0020-7683 (EN)
196 (EN)
Publisher
PERGAMON-ELSEVIER SCIENCE LTD (EN)
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