Abstract
Formability of two-layer metallic sheet is constrained by plastic instability and localized necking. Forming limit diagram (FLD) is an accepted measure of sheet metal formability. The formability of two-layer sheets depends on the material properties of their components such as strain hardening exponent, strain rate sensitivity coefficient, stiffness coefficient, and grain size. In this paper, the effects of the mentioned parameters on the FLD of two-layer sheets are investigated with a theoretical model which has been verified with an experimental approach. The results show that the forming limit of two-layer sheet lies between the forming limits of its components depends on their material properties.
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References
Keeler SP, Bachofen WA (1964) Plastic instability and fracture in sheet stretched over rigid punches. ASM Trans 56:25–48
Marciniak Z, Kuczynski K (1967) Limit strains in the processes of stretch-forming sheet metal. Int J Mech Sci 9:609–620
Ghosh AK (1977) The influence of strain hardening and strain rate sensitivity on sheet metal forming. Transaction of the ASME pp 264–274.
Hutchinson JW, Neale KW (1978) Sheet necking-time independent behavior. Plenum Press, New York, pp 127–153
Marciniak Z, Kuczynski K, Pokora T (1973) Influence of the plastic properties of a material on the forming limit diagram for sheet metal in tension. Int J Mech Sci 15:789–805
Yamaguchi K, Mellor PB (1976) Thickness and grain size dependence of limit strains in sheet metal stretching. Int J Mech Sci 18:5–90
Date PP, Padmanabhan KA (1992) On the prediction of the forming-limit diagram of sheet metals. Int J Mech Sci 34(5):363–374
Zhao L, Sowerby R, Sklad MP (1996) A theoretical and experimental investigation of limit strains in sheet metal forming. Int J Mech Sci 38(12):1307–1317
Li M, Chandra A (1999) Influence of strain-rate sensitivity on necking and instability in sheet metal forming. J of Mater Process Tech 96:133–138
Wu H (2000) Influence of strain rates and strain states on the formability of a superplastic 8090 aluminum alloy. J of Mater Process Tech 101:76–80
Kuroda M, Tvergaard V (2000) Forming limit diagrams for anisotropic metal sheets with different yield criteria. Int J Sol Struct 37:5037–5059
Shakeri M, Sadough A, Dariani BM (2000) Effect of pre-straining and grain size on the limit strains in sheet metal forming. Proc Instn Mech Engrs Part B: J Engng Manuf 214(B):821–827
Al-Qureshi HA, Klein AN, Fredel MC (2005) Grain size and surface roughness effect on the instability strains in sheet metal stretching. J Mater Process Tech 170:204–210
Stoughton TB, Yoon JW (2005) Sheet metal formability analysis for anisotropic materials under non-proportional loading. J Mech Sci 47:1972–2002
Ganjiani M, Assempour A (2007) An improved analytical approach for determination of forming limit diagrams considering the effects of yield functions. J Mater Process Tech 182:598–607
Semiatin SL, Piehler HR (1979) Deformation of sandwich sheet materials in uniaxial tension. Metallurgical Trans 10A:85–96
Semiatin SL, Piehler HR (1979) Formability of sandwich sheet materials in plane strain compression and rolling. Metallurgical Trans 10A:97–107
Mori T, Kurimoto S (1996) Press-formability of stainless steel and aluminum clad sheet. J of Mater Process Tech 56:242–253
Yoshida F, Hino R (1997) Forming limit of stainless steel- clad aluminium sheets under plane stress condition. J of Mater Process Tech 63:66–71
Kim KJ, Kim D, Choi SH, Shin KS, Barlat F, Oh KH, Youn JR (2003) Formability of AA5182/polypropylen/AA5182 sandwich sheets. J of Mater Process Tech 139:1–7
Lang L, Danckert J, Nielsen KB (2005) Multi layer sheet hydro forming: experimental and numerical investigation in to the very thin layer in the middle. J of Mater Process Tech 170:524–535
Jalali Aghchai A, Shakeri M, Mollaei Dariani B (2008) Theoretical and experimental formability study of two-layer metallic sheet (Al1100/St12). Instn Mech Engrs Part B: J Engng Manuf 222(B):1131–1138
Dariani BM, Azodi HD (2003) Finding the optimum Hill index in the determination of the forming limit diagram. Instn Mech Engrs Part B: J Engng Manuf 217(B):1677–1683
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Jalali Aghchai, A., Shakeri, M. & Mollaei Dariani, B. Influences of material properties of components on formability of two-layer metallic sheets. Int J Adv Manuf Technol 66, 809–823 (2013). https://doi.org/10.1007/s00170-012-4368-9
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DOI: https://doi.org/10.1007/s00170-012-4368-9