TY  - JOUR
AU  - Međo, Bojan
AU  - Rakin, Marko
AU  - Kolednik, O.
AU  - Simha, N K.
AU  - Fischer, F.D.
PY  - 2009
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1402
AB  - Residual stresses in many structural components are often produced during the fabrication or bonding processes, due to the cooling from elevated temperatures. Examples for such behavior are: welded and soldered joints, composites, functionally graded materials, coatings, etc. The residual stresses in these materials affect the stress and strain fields in the vicinity of the crack tip, thus making the crack driving force to become different compared to a material without residual stresses. In this paper, the influence of residual stresses is analyzed using FEM software ABAQUS and post processing routine based on the method of configurationally forces. A previous application of this method has included investigations on the influence of mechanical in homogeneities (Young's modulus, yield stress, hardening coefficient) in welded joints of high-strength low-alloyed steels (HSLA). However, these analyses did not include the effect of in homogeneity in thermal properties (coefficient of thermal expansion). The main goal of this paper is to find out the effect of thermally induced residual stresses on the crack driving force in biomaterials and to use the obtained data to improve the integrity and work safety of welded and other inhomogeneous structures.
AB  - Zaostali naponi u mnogim konstrukcijama nastaju tokom hlađenja u procesu proizvodnje ili spajanja materijala. Primeri su: zavareni i zalemljeni spojevi, kompoziti, materijali sa izraženom anizotropijom, prevlake i dr. Zaostali naponi u slučaju ovakvih materijala utiču na polje napona i deformacija u okolini vrha prsline i dovode do promene vrednosti sile rasta prsline u odnosu na materijal bez zaostalih napona. U ovom radu, uticaj zaostalih napona je analiziran metodom konačnih elemenata, primenom programskog paketa ABAQUS, uz korišćenje postprocesorskog programa razvijenog primenom metode konfiguracionih sila. Ovaj pristup je ranije primenjen na ispitivanje uticaja nehomogenosti mehaničkih osobina (modula elastičnosti, granice tečenja, koeficijenta deformacionog ojačavanja) na spojeve niskolegiranih čelika povišene čvrstoće, ali bez uzimanja u obzir nehomogenosti koeficijenta termičkog širenja materijala. Cilj ovog rada je analiza uticaja termički unetih zaostalih napona na silu rasta prsline u bimaterijalnim spojevima i korišćenje dobijenih rezultata za obezbeđenje integriteta i sigurnog rada zavarenih konstrukcija i struktura sastavljenih od više materijala.
PB  - DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd
T2  - Zavarivanje i zavarene konstrukcije
T1  - The influence of residual stresses on welded joints and other inhomogeneous materials with cracks
T1  - Uticaj zaostalih napona na ponašanje zavarenih spojeva i drugih nehomogenih materijala sa prslinama
EP  - 49
IS  - 2
SP  - 43
VL  - 54
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1402
ER  - 

@article{
author = "Međo, Bojan and Rakin, Marko and Kolednik, O. and Simha, N K. and Fischer, F.D.",
year = "2009",
abstract = "Residual stresses in many structural components are often produced during the fabrication or bonding processes, due to the cooling from elevated temperatures. Examples for such behavior are: welded and soldered joints, composites, functionally graded materials, coatings, etc. The residual stresses in these materials affect the stress and strain fields in the vicinity of the crack tip, thus making the crack driving force to become different compared to a material without residual stresses. In this paper, the influence of residual stresses is analyzed using FEM software ABAQUS and post processing routine based on the method of configurationally forces. A previous application of this method has included investigations on the influence of mechanical in homogeneities (Young's modulus, yield stress, hardening coefficient) in welded joints of high-strength low-alloyed steels (HSLA). However, these analyses did not include the effect of in homogeneity in thermal properties (coefficient of thermal expansion). The main goal of this paper is to find out the effect of thermally induced residual stresses on the crack driving force in biomaterials and to use the obtained data to improve the integrity and work safety of welded and other inhomogeneous structures., Zaostali naponi u mnogim konstrukcijama nastaju tokom hlađenja u procesu proizvodnje ili spajanja materijala. Primeri su: zavareni i zalemljeni spojevi, kompoziti, materijali sa izraženom anizotropijom, prevlake i dr. Zaostali naponi u slučaju ovakvih materijala utiču na polje napona i deformacija u okolini vrha prsline i dovode do promene vrednosti sile rasta prsline u odnosu na materijal bez zaostalih napona. U ovom radu, uticaj zaostalih napona je analiziran metodom konačnih elemenata, primenom programskog paketa ABAQUS, uz korišćenje postprocesorskog programa razvijenog primenom metode konfiguracionih sila. Ovaj pristup je ranije primenjen na ispitivanje uticaja nehomogenosti mehaničkih osobina (modula elastičnosti, granice tečenja, koeficijenta deformacionog ojačavanja) na spojeve niskolegiranih čelika povišene čvrstoće, ali bez uzimanja u obzir nehomogenosti koeficijenta termičkog širenja materijala. Cilj ovog rada je analiza uticaja termički unetih zaostalih napona na silu rasta prsline u bimaterijalnim spojevima i korišćenje dobijenih rezultata za obezbeđenje integriteta i sigurnog rada zavarenih konstrukcija i struktura sastavljenih od više materijala.",
publisher = "DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd",
journal = "Zavarivanje i zavarene konstrukcije",
title = "The influence of residual stresses on welded joints and other inhomogeneous materials with cracks, Uticaj zaostalih napona na ponašanje zavarenih spojeva i drugih nehomogenih materijala sa prslinama",
pages = "49-43",
number = "2",
volume = "54",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1402"
}

Međo, B., Rakin, M., Kolednik, O., Simha, N. K.,& Fischer, F.D.. (2009). The influence of residual stresses on welded joints and other inhomogeneous materials with cracks. in Zavarivanje i zavarene konstrukcije
DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd., 54(2), 43-49.
https://hdl.handle.net/21.15107/rcub_technorep_1402

Međo B, Rakin M, Kolednik O, Simha NK, Fischer F. The influence of residual stresses on welded joints and other inhomogeneous materials with cracks. in Zavarivanje i zavarene konstrukcije. 2009;54(2):43-49.
https://hdl.handle.net/21.15107/rcub_technorep_1402 .

Međo, Bojan, Rakin, Marko, Kolednik, O., Simha, N K., Fischer, F.D., "The influence of residual stresses on welded joints and other inhomogeneous materials with cracks" in Zavarivanje i zavarene konstrukcije, 54, no. 2 (2009):43-49,
https://hdl.handle.net/21.15107/rcub_technorep_1402 .

TY  - JOUR
AU  - Rakin, Marko
AU  - Kolednik, O.
AU  - Međo, Bojan
AU  - Simha, N. K.
AU  - Fischer, F.D.
PY  - 2009
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1412
AB  - The effect of thermal residual stresses in bimaterial structure with initial crack located near a sharp interface is discussed in this paper. Bimaterial compact tension (CT) specimen is used in the analysis, and the residual stresses are introduced by cooling of the specimen. The residual stresses affect the stress and strain fields near the crack tip, and the crack-driving force is different compared with that in the homogeneous material without residual stresses. This difference can be quantitatively expressed through an additional crack-driving force term-the material inhomogeneity term, Cinh. In this paper, it is evaluated using the post-processing procedure based on the concept of configurational forces, following a finite-element analysis. The results indicate that accurate numerical analysis of pre-cracked bimaterials should include the effect of thermally induced residual stresses. This effect cannot be neglected, even for bimaterials with homogeneous mechanical properties and inhomogeneity in thermal properties only (e.g. welded joints of ferritic and austenitic steel). Based on the obtained results, data from this study can be used in engineering practice to improve integrity and work safety of various inhomogeneous structures.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - International Journal of Mechanical Sciences
T1  - A case study on the effect of thermal residual stresses on the crack-driving force in linear-elastic bimaterials
EP  - 540
IS  - 7
SP  - 531
VL  - 51
DO  - 10.1016/j.ijmecsci.2009.05.006
ER  - 

@article{
author = "Rakin, Marko and Kolednik, O. and Međo, Bojan and Simha, N. K. and Fischer, F.D.",
year = "2009",
abstract = "The effect of thermal residual stresses in bimaterial structure with initial crack located near a sharp interface is discussed in this paper. Bimaterial compact tension (CT) specimen is used in the analysis, and the residual stresses are introduced by cooling of the specimen. The residual stresses affect the stress and strain fields near the crack tip, and the crack-driving force is different compared with that in the homogeneous material without residual stresses. This difference can be quantitatively expressed through an additional crack-driving force term-the material inhomogeneity term, Cinh. In this paper, it is evaluated using the post-processing procedure based on the concept of configurational forces, following a finite-element analysis. The results indicate that accurate numerical analysis of pre-cracked bimaterials should include the effect of thermally induced residual stresses. This effect cannot be neglected, even for bimaterials with homogeneous mechanical properties and inhomogeneity in thermal properties only (e.g. welded joints of ferritic and austenitic steel). Based on the obtained results, data from this study can be used in engineering practice to improve integrity and work safety of various inhomogeneous structures.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "International Journal of Mechanical Sciences",
title = "A case study on the effect of thermal residual stresses on the crack-driving force in linear-elastic bimaterials",
pages = "540-531",
number = "7",
volume = "51",
doi = "10.1016/j.ijmecsci.2009.05.006"
}

Rakin, M., Kolednik, O., Međo, B., Simha, N. K.,& Fischer, F.D.. (2009). A case study on the effect of thermal residual stresses on the crack-driving force in linear-elastic bimaterials. in International Journal of Mechanical Sciences
Pergamon-Elsevier Science Ltd, Oxford., 51(7), 531-540.
https://doi.org/10.1016/j.ijmecsci.2009.05.006

Rakin M, Kolednik O, Međo B, Simha NK, Fischer F. A case study on the effect of thermal residual stresses on the crack-driving force in linear-elastic bimaterials. in International Journal of Mechanical Sciences. 2009;51(7):531-540.
doi:10.1016/j.ijmecsci.2009.05.006 .

Rakin, Marko, Kolednik, O., Međo, Bojan, Simha, N. K., Fischer, F.D., "A case study on the effect of thermal residual stresses on the crack-driving force in linear-elastic bimaterials" in International Journal of Mechanical Sciences, 51, no. 7 (2009):531-540,
https://doi.org/10.1016/j.ijmecsci.2009.05.006 . .