Abstract
The definition of a traction-separation relationship is essential in cohesive zone models because it describes the nonlinear fracture process zone. A few models are investigated in this paper and a comparative study is conducted. Among various traction-separation relationships, the one in Abaqus is assessed by evaluating the cohesive traction and its tangent stiffness according to a given separation path. The results demonstrate that the traction-separation relationship in Abaqus can lead to non-physical responses because of a pathological positive tangent stiffness under softening condition. This is reflected in cohesive tractions that increase and decrease repeatedly while the cohesive separation monotonically increases. Thus, together with supporting information, this paper conveys the message that a traction-separation relationship should be developed and selected with great caution, especially under mixed-mode conditions.
| Original language | English |
|---|---|
| Pages (from-to) | 71-78 |
| Number of pages | 8 |
| Journal | Mechanics Research Communications |
| Volume | 78 |
| DOIs | |
| Publication status | Published - 2016 Dec 1 |
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All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
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Assessment of cohesive traction-separation relationships in ABAQUS : A comparative study. / Park, Kyoungsoo; Choi, Habeun; Paulino, Glaucio H.
In: Mechanics Research Communications, Vol. 78, 01.12.2016, p. 71-78.Research output: Contribution to journal › Article
TY - JOUR
T1 - Assessment of cohesive traction-separation relationships in ABAQUS
T2 - A comparative study
AU - Park, Kyoungsoo
AU - Choi, Habeun
AU - Paulino, Glaucio H.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - The definition of a traction-separation relationship is essential in cohesive zone models because it describes the nonlinear fracture process zone. A few models are investigated in this paper and a comparative study is conducted. Among various traction-separation relationships, the one in Abaqus is assessed by evaluating the cohesive traction and its tangent stiffness according to a given separation path. The results demonstrate that the traction-separation relationship in Abaqus can lead to non-physical responses because of a pathological positive tangent stiffness under softening condition. This is reflected in cohesive tractions that increase and decrease repeatedly while the cohesive separation monotonically increases. Thus, together with supporting information, this paper conveys the message that a traction-separation relationship should be developed and selected with great caution, especially under mixed-mode conditions.
AB - The definition of a traction-separation relationship is essential in cohesive zone models because it describes the nonlinear fracture process zone. A few models are investigated in this paper and a comparative study is conducted. Among various traction-separation relationships, the one in Abaqus is assessed by evaluating the cohesive traction and its tangent stiffness according to a given separation path. The results demonstrate that the traction-separation relationship in Abaqus can lead to non-physical responses because of a pathological positive tangent stiffness under softening condition. This is reflected in cohesive tractions that increase and decrease repeatedly while the cohesive separation monotonically increases. Thus, together with supporting information, this paper conveys the message that a traction-separation relationship should be developed and selected with great caution, especially under mixed-mode conditions.
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UR - http://www.scopus.com/inward/citedby.url?scp=85000981994&partnerID=8YFLogxK
U2 - 10.1016/j.mechrescom.2016.09.004
DO - 10.1016/j.mechrescom.2016.09.004
M3 - Article
VL - 78
SP - 71
EP - 78
JO - Mechanics Research Communications
JF - Mechanics Research Communications
SN - 0093-6413
ER -