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- Collocated grid (1)
- Crack tip opening displacement (CTOD) (1)
- Critical Strain Energy Release Rate (1)
- Die-Casting modeling (1)
- Failure Criterion (1)
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- Finite Volume Method (1)
- Finite element analyses (1)
- Fracture toughness (1)
- Fracture toughness; J-R curve; Three-dimensional (3D); Finite element analysis (FEA); Single-edge notched bend (SE(B)); ηpl factor; Constraint (1)
- J-integral (1)
- Magnesium alloys (1)
- Mixed-Mode Loading (1)
- Phase change modeling (1)
- Pipeline (1)
- Random Fibre Polymer Composite (1)
- SE(T) specimen (1)
- Solidification modeling (1)
- Through-Thickness Crack (1)
- UD Polymer Composites (1)
- Unstructured grid (1)
- Volume-Averaged technique (1)
- Wedge casting (1)
Articles 1 - 4 of 4
Full-Text Articles in Applied Mechanics
Numerical Studies For Improving Fracture Toughness Resistance Curve Testing Using Single-Edge (Notched) Tension Specimens, Yifan Huang
Electronic Thesis and Dissertation Repository
The fracture toughness resistance curve, i.e. the J-integral resistance curve (J-R curve) or the crack tip opening displacement resistance (CTOD-R) curves, is widely used in the integrity assessment and strain-based design of energy pipelines with respect to planar defects (i.e. cracks). This thesis deals with issues related to the experimental determination of the J(CTOD)-R curves using the newly-developed single-edge (notched) tension (SE(T)) specimens. In the first study, the plastic geometry factor, i.e. the ηpl factor, used to evaluate J in a J-R curve test based on …
Mechanistic Failure Criterion For Unidirectional And Random Fibre Polymer Composites, Jamaloddin Jamali
Mechanistic Failure Criterion For Unidirectional And Random Fibre Polymer Composites, Jamaloddin Jamali
Electronic Thesis and Dissertation Repository
Polymer composite design in energy absorbing components requires a failure criterion that can predict the energy involved in its fracture under different modes of loading. Present mixed mode criteria are mainly empirical or semi-empirical, and are only suitable for a small range of composite types.
The purpose of this study was to develop a mechanistic failure criterion that is applicable to a wide range of polymer composites. An energy based mechanistic failure criterion is proposed to characterize the toughness of unidirectional (UD) and randomly oriented short fibre composites (random fibre composites).
In UD and random composites, the criterion predicts the …
Finite Element Analyses Of Single-Edge Bend Specimens For J-R Curve Development, Yifan Huang
Finite Element Analyses Of Single-Edge Bend Specimens For J-R Curve Development, Yifan Huang
Electronic Thesis and Dissertation Repository
The fracture toughness resistance curve such as the J-integral resistance curve (J-R curve) is widely used in the integrity assessment and strain-based design of energy pipelines with respect to planar defects (i.e. cracks). Two studies about the development of the J-R curve are carried out and reported in this thesis. In the first study, the plastic geometry factor, i.e. the ηpl factor, used to evaluate J in a J-R curve test based on the single-edge bend (SE(B)) specimen is developed based on the three-dimensional (3D) finite element analysis (FEA). The main …
Numerical Modeling Of Solidification Process And Prediction Of Mechanical Properties In Magnesium Alloys, Mehdi Farrokhnejad
Numerical Modeling Of Solidification Process And Prediction Of Mechanical Properties In Magnesium Alloys, Mehdi Farrokhnejad
Electronic Thesis and Dissertation Repository
A formulation used to simulate the solidification process of magnesium alloys is developed based upon the volume averaged finite volume method on unstructured collocated grids. To derive equations, a non-zero volume fraction gradient has been considered and resulting additional terms are well reasoned. For discretization the most modern approximations for gradient and hessians are used and novelties outlined. Structure-properties correlations are incorporated into the in-house code and the proposed formulation is tested for a wedge-shaped magnesium alloy casting. While the results of this study show a good agreement with the experimental data, it was concluded that a better understanding of …