Details
| Original language | English |
|---|---|
| Pages (from-to) | 9-14 |
| Journal | International journal of fracture |
| Volume | 101 |
| Issue number | 3 |
| Publication status | Published - Feb 2000 |
Abstract
A model introducing cohesive zones around material interfaces to simulate interfacial damage in microheterogeneous materials is developed. The material behavior within the cohesive zones is unknown a-priori, and is weakened, or "relaxed", on the continuum level from an initially undamaged state, by a reduction of the spatially variable elasticity tensor's eigenvalues. This reduction is initiated if constraints placed on the microstress fields, for example critical levels of pressure or deviatoric stresses, are violated. Outside of the cohesive zones the material is unaltered. Numerical computations are performed, employing the finite element method, to illustrate the approach in three dimensional applications. Figure 1: An example of ductile iron consisting of embedded graphite nodules (spherulites) encased in envelopes of free ferrite in a matrix of pearlite, magnified 100 × (Metals Handbook (1978)). Qualitatively observed overall response of materials undergoing interfacial damage.
ASJC Scopus subject areas
- Engineering(all)
- Computational Mechanics
- Mathematics(all)
- Modelling and Simulation
- Engineering(all)
- Mechanics of Materials
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In: International journal of fracture, Vol. 101, No. 3, 02.2000, p. 9-14.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A computational model for interfacial damage through microstructural cohesive zone relaxation
AU - Zohdi, Tarek I.
AU - Wriggers, Peter
PY - 2000/2
Y1 - 2000/2
N2 - A model introducing cohesive zones around material interfaces to simulate interfacial damage in microheterogeneous materials is developed. The material behavior within the cohesive zones is unknown a-priori, and is weakened, or "relaxed", on the continuum level from an initially undamaged state, by a reduction of the spatially variable elasticity tensor's eigenvalues. This reduction is initiated if constraints placed on the microstress fields, for example critical levels of pressure or deviatoric stresses, are violated. Outside of the cohesive zones the material is unaltered. Numerical computations are performed, employing the finite element method, to illustrate the approach in three dimensional applications. Figure 1: An example of ductile iron consisting of embedded graphite nodules (spherulites) encased in envelopes of free ferrite in a matrix of pearlite, magnified 100 × (Metals Handbook (1978)). Qualitatively observed overall response of materials undergoing interfacial damage.
AB - A model introducing cohesive zones around material interfaces to simulate interfacial damage in microheterogeneous materials is developed. The material behavior within the cohesive zones is unknown a-priori, and is weakened, or "relaxed", on the continuum level from an initially undamaged state, by a reduction of the spatially variable elasticity tensor's eigenvalues. This reduction is initiated if constraints placed on the microstress fields, for example critical levels of pressure or deviatoric stresses, are violated. Outside of the cohesive zones the material is unaltered. Numerical computations are performed, employing the finite element method, to illustrate the approach in three dimensional applications. Figure 1: An example of ductile iron consisting of embedded graphite nodules (spherulites) encased in envelopes of free ferrite in a matrix of pearlite, magnified 100 × (Metals Handbook (1978)). Qualitatively observed overall response of materials undergoing interfacial damage.
UR - http://www.scopus.com/inward/record.url?scp=0042687830&partnerID=8YFLogxK
U2 - 10.1023/A:1007637128498
DO - 10.1023/A:1007637128498
M3 - Article
AN - SCOPUS:0042687830
VL - 101
SP - 9
EP - 14
JO - International journal of fracture
JF - International journal of fracture
SN - 0376-9429
IS - 3
ER -