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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한기계학회 Journal of Mechanical Science and Technology Journal of Mechanical Science and Technology Vol.20 No.5
- 발행연도
- 2006.5
- 수록면
- 621 - 633 (13page)
이용수
초록· 키워드
오류제보하기
To reflect the size effect of material (1~15 ㎛) during plastic deformation of polycrystalline copper, a constitutive equation which includes the strain gradient plasticity theory and intrinsic material length model is coupled with the finite element analysis and applied to plane strain deformation problem. The method of least square has been used to calculate the strain gradient at each element during deformation and the effect of distributed force on the strain gradient is investigated as well. It shows when material size is less than the intrinsic material length (1.54 ㎛), its deformation behavior is quite different compared with that computed from the conventional plasticity. The generation of strain gradient is greatly suppressed, but it appears again as the material size increases. Results also reveal that the strain gradient leads to deformation hardening. The distributed force plays a role to amplify the strain gradient distribution.
목차
Abstract
1. Introduction
2. Strain Gradient Plasticity
3. Numerical Implementation
4. Results and Discussion
5. Concluding Remarks
References
참고문헌 (25)
참고문헌 신청
Arsenlis, A. and Park, D. M., 1999, "Crystallographic Aspects of Geometrically Necessary and Statistically Stored Dislocation Density," Acta Metallurgica et Materialia, 47, pp.1597~1611.
Ashby, M. F., 1970, "The Deformation of Plastically Non-homogeneous Alloys," Philosl Mag., 21, pp.399~424.
Begley, M. R. and Hutchinson, J. W., 1998, "The Mechanics of Size-dependent Indentation," Journal of Mechanics and Physics of Solids, 46, pp.2049~2068.
Fleck, N. A. Muller, G. M. Ashby, M. F. and Hutchinson, J. W., 1994, "Strain Gradient Plasticity: Theory and Experiments," Acta Metallurgica et Materialia, 42, pp.475~487.
Fleck, N. A. and Hutchinson, J. W., 1993, "A Phenomenological Theory for Strain Gradient Effects in Plasticity," Journal of Mechanics and Physics of Solids, 41, pp.1825~1857.
Ashby, M. F., 1970, "The Deformation of Plastically Non-homogeneous Alloys," Philosl Mag., 21, pp.399~424.
Begley, M. R. and Hutchinson, J. W., 1998, "The Mechanics of Size-dependent Indentation," Journal of Mechanics and Physics of Solids, 46, pp.2049~2068.
Fleck, N. A. Muller, G. M. Ashby, M. F. and Hutchinson, J. W., 1994, "Strain Gradient Plasticity: Theory and Experiments," Acta Metallurgica et Materialia, 42, pp.475~487.
Fleck, N. A. and Hutchinson, J. W., 1993, "A Phenomenological Theory for Strain Gradient Effects in Plasticity," Journal of Mechanics and Physics of Solids, 41, pp.1825~1857.
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