Abstract
The materials display strong size effect at the micron or sub-micron scale. The classical plasticity theories cannot explain this size dependence because they possess no internal material lengths. Based on the Taylor model in dislocation mechanics, the theory of Mechanism-based Strain Gradient (MSG) plasticity has been derived. It agrees very well with the available micro-scale experiments, such as micro-torsion, micro-bending and micro-indentation hardness experiments. The structure of the asymptotic crack tip fields associated with MSG plasticity is investigated. It is shown that the crack tip field associated with MSG plasticity does not have separable form of solutions. Its implication on the fracture criterion in MSG plasticity is also discussed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | I/- |
| Journal | Key Engineering Materials |
| Volume | 183 |
| State | Published - Jan 1 2000 |
| Event | 4th International Conference on Fracture and Strength of Solids - Pohang, South Korea Duration: Aug 16 2000 → Aug 18 2000 |
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ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
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Mechanism-based strain gradient (MSG) plasticity and the associated asymptotic crack-tip fields. / Hwang, K. C.; Huang, Y.
In: Key Engineering Materials, Vol. 183, 01.01.2000, p. I/-.Research output: Contribution to journal › Conference article
TY - JOUR
T1 - Mechanism-based strain gradient (MSG) plasticity and the associated asymptotic crack-tip fields
AU - Hwang, K. C.
AU - Huang, Y.
PY - 2000/1/1
Y1 - 2000/1/1
N2 - The materials display strong size effect at the micron or sub-micron scale. The classical plasticity theories cannot explain this size dependence because they possess no internal material lengths. Based on the Taylor model in dislocation mechanics, the theory of Mechanism-based Strain Gradient (MSG) plasticity has been derived. It agrees very well with the available micro-scale experiments, such as micro-torsion, micro-bending and micro-indentation hardness experiments. The structure of the asymptotic crack tip fields associated with MSG plasticity is investigated. It is shown that the crack tip field associated with MSG plasticity does not have separable form of solutions. Its implication on the fracture criterion in MSG plasticity is also discussed.
AB - The materials display strong size effect at the micron or sub-micron scale. The classical plasticity theories cannot explain this size dependence because they possess no internal material lengths. Based on the Taylor model in dislocation mechanics, the theory of Mechanism-based Strain Gradient (MSG) plasticity has been derived. It agrees very well with the available micro-scale experiments, such as micro-torsion, micro-bending and micro-indentation hardness experiments. The structure of the asymptotic crack tip fields associated with MSG plasticity is investigated. It is shown that the crack tip field associated with MSG plasticity does not have separable form of solutions. Its implication on the fracture criterion in MSG plasticity is also discussed.
UR - http://www.scopus.com/inward/record.url?scp=0033727319&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033727319&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:0033727319
VL - 183
SP - I/-
JO - Key Engineering Materials
JF - Key Engineering Materials
SN - 1013-9826
ER -