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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2022.8
- 수록면
- 214 - 228 (15page)
이용수
초록· 키워드
오류제보하기
The yield criterion, or called yield function, plays an important role in the study of plastic working of a sheet because it governs the plastic deformation properties of the sheet during plastic forming process. In this paper, we propose a novel anisotropic yield function useful for describing the plastic behavior of various anisotropic sheets. The proposed yield function includes the anisotropic version of the second stress invariant 𝐽₂ and the third stress invariant 𝐽₃. The anisotropic yield function newly proposed in this study is as follows.
𝐹(𝐽₂) + 𝛼𝐺(𝐽₃) + 𝛽𝐻 (𝐽₂ × 𝐽₃) = m<SUP> k</SUP>
The proposed yield function well explains the anisotropic plastic behavior of various sheets by introducing the parameters α and β, and also exhibits both symmetrical and asymmetrical yield surfaces. The parameters included in the proposed model are determined through an optimization algorithm from uniaxial and biaxial experimental data under proportional loading path. In this study, the validity of the proposed nisotropic yield function was verified by comparing the yield surface shape, normalized uniaxial yield stress value, and Lankford"s anisotropic coefficient R-value derived with the experimental results. Application for the proposed anisotropic yield function to aluminum sheet shows symmetrical yielding behavior and to pure titanium sheet shows asymmetric yielding behavior, it was shown that the yield curve and yield behavior of various types of sheet materials can be predicted reasonably by using the proposed new yield anisotropic function.
𝐹(𝐽₂) + 𝛼𝐺(𝐽₃) + 𝛽𝐻 (𝐽₂ × 𝐽₃) = m<SUP> k</SUP>
The proposed yield function well explains the anisotropic plastic behavior of various sheets by introducing the parameters α and β, and also exhibits both symmetrical and asymmetrical yield surfaces. The parameters included in the proposed model are determined through an optimization algorithm from uniaxial and biaxial experimental data under proportional loading path. In this study, the validity of the proposed nisotropic yield function was verified by comparing the yield surface shape, normalized uniaxial yield stress value, and Lankford"s anisotropic coefficient R-value derived with the experimental results. Application for the proposed anisotropic yield function to aluminum sheet shows symmetrical yielding behavior and to pure titanium sheet shows asymmetric yielding behavior, it was shown that the yield curve and yield behavior of various types of sheet materials can be predicted reasonably by using the proposed new yield anisotropic function.
목차
Abstract
1. 서론
2. 제안된 모델
3. 제안된 항복함수 모델의 적용
4. 결론
REFERENCES
참고문헌 (54)
참고문헌 신청
M. Zhan, K. Guo, H.Yang, 2016, Advances and trends in plastic forming technologies for welded tubes, Chinese J. Aeronaut., Vol.29. No.2, pp.305–315.
B. Meng, M. Wan, X. Wu 2014, Inner wrinkling control in hydrodynamic deep drawing of an irregular surface part using drawbeads, Chinese J. Aeronaut., Vol.27, No.3. pp.697–707.
X. Li, N. Song, G. Guo, 2013. Prediction of forming limit curve (FLC) for Al–Li alloy 2198-T3 sheet using different yield functions, Chinese J. Aeronaut., Vol.26, No.5, pp.1317–1323.
H. Swift, 1952, Plastic instability under plane stress, J. Mech. Phys. Solids, Vol.1, No.1, pp.1–18.
E. Voce E, 1948, The relationship between stress and strain for homogeneous deformation, J. Inst. Met., Vol.74, pp.537–62.
B. Meng, M. Wan, X. Wu 2014, Inner wrinkling control in hydrodynamic deep drawing of an irregular surface part using drawbeads, Chinese J. Aeronaut., Vol.27, No.3. pp.697–707.
X. Li, N. Song, G. Guo, 2013. Prediction of forming limit curve (FLC) for Al–Li alloy 2198-T3 sheet using different yield functions, Chinese J. Aeronaut., Vol.26, No.5, pp.1317–1323.
H. Swift, 1952, Plastic instability under plane stress, J. Mech. Phys. Solids, Vol.1, No.1, pp.1–18.
E. Voce E, 1948, The relationship between stress and strain for homogeneous deformation, J. Inst. Met., Vol.74, pp.537–62.
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UCI(KEPA) : I410-ECN-0101-2022-551-001618984