Abstract
Results from a newly developed model for failure in unidirectional fiber reinforced composites based on fracture mechanics are presented. The model is based on (i) analysis of branch crack initiation from the tip of an initial microcrack embedded in an anisotropic material, which serves as a model for the fiber reinforced composite and (ii) evaluation of anisotropy in homogenized elastic material properties and fracture toughness. Based on this model, failure envelope, dominant initial flaw orientation and failure mode for unidirectional fiber reinforced composites under a wide range of stress states are predicted. Parametric study provides quantitative evaluation of the effect of various mechanical and physical properties on the failure behavior, and their influence on strength is identified. Results from the current model are compared with those of existing phenomenological models, which show reasonable agreement.
| Original language | English |
|---|---|
| Pages (from-to) | 7215-7233 |
| Number of pages | 19 |
| Journal | International Journal of Solids and Structures |
| Volume | 38 |
| Issue number | 40-41 |
| DOIs | |
| Publication status | Published - 2001 Sep 7 |
| Externally published | Yes |
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Keywords
- Failure mode
- Failure model
- Fiber reinforced composite
- Fracture mechanics
- Micromechanics
ASJC Scopus subject areas
- Mechanical Engineering
- Mechanics of Materials
Cite this
A micromechanical failure model for unidirectional fiber reinforced composites. / Oguni, Kenji; Ravichandran, G.
In: International Journal of Solids and Structures, Vol. 38, No. 40-41, 07.09.2001, p. 7215-7233.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A micromechanical failure model for unidirectional fiber reinforced composites
AU - Oguni, Kenji
AU - Ravichandran, G.
PY - 2001/9/7
Y1 - 2001/9/7
N2 - Results from a newly developed model for failure in unidirectional fiber reinforced composites based on fracture mechanics are presented. The model is based on (i) analysis of branch crack initiation from the tip of an initial microcrack embedded in an anisotropic material, which serves as a model for the fiber reinforced composite and (ii) evaluation of anisotropy in homogenized elastic material properties and fracture toughness. Based on this model, failure envelope, dominant initial flaw orientation and failure mode for unidirectional fiber reinforced composites under a wide range of stress states are predicted. Parametric study provides quantitative evaluation of the effect of various mechanical and physical properties on the failure behavior, and their influence on strength is identified. Results from the current model are compared with those of existing phenomenological models, which show reasonable agreement.
AB - Results from a newly developed model for failure in unidirectional fiber reinforced composites based on fracture mechanics are presented. The model is based on (i) analysis of branch crack initiation from the tip of an initial microcrack embedded in an anisotropic material, which serves as a model for the fiber reinforced composite and (ii) evaluation of anisotropy in homogenized elastic material properties and fracture toughness. Based on this model, failure envelope, dominant initial flaw orientation and failure mode for unidirectional fiber reinforced composites under a wide range of stress states are predicted. Parametric study provides quantitative evaluation of the effect of various mechanical and physical properties on the failure behavior, and their influence on strength is identified. Results from the current model are compared with those of existing phenomenological models, which show reasonable agreement.
KW - Failure mode
KW - Failure model
KW - Fiber reinforced composite
KW - Fracture mechanics
KW - Micromechanics
UR - http://www.scopus.com/inward/record.url?scp=0035823199&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035823199&partnerID=8YFLogxK
U2 - 10.1016/S0020-7683(00)00284-5
DO - 10.1016/S0020-7683(00)00284-5
M3 - Article
AN - SCOPUS:0035823199
VL - 38
SP - 7215
EP - 7233
JO - International Journal of Solids and Structures
JF - International Journal of Solids and Structures
SN - 0020-7683
IS - 40-41
ER -