A Mathematical Model for Predicting Residual Stresses in Pre-Stretched Aluminum Alloy Plate

Abstract:

A mathematical model has been developed to predict the residual stresses level in pre-stretched aluminum alloy plate. This is based on force balances of the residual stress, theory of plastoelasticity and a new conception of free length. The model is relatively simple because only rolling direction residual stress is taken into account, but provides a clear illustration of stress relief mechanism in stretching process. With this model, residual stress distributions of stretched beam can be determined directly by knowing the specimen dimensions, material properties and the original stress. The model offers an useful tool to show the effect of varying tension ratio on the final residual stress level, thus makes it possible to predict stress relief and control residual stresses. An example of using the model is presented by applying published data while showing mechanism of stress relief during stretching. Analysis indicates that it is stretch-caused convergence of the free lengths of strips in beam that lead to reduction in the residual stresses.

• Periodical: Advanced Materials Research (Volumes 97-101)
• Pages: 3187-3193
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.97-101.3187
• Online since: March 2010
• Authors: Shu Yuan Zhang, Yun Xin Wu
• Keywords: Aluminum Alloy Plate, Model, Pre-Stretched, Residual Stress

References

[1] L.G. Gu, L.Y. Wang and R.C. Liu: Light Alloy Fabrication Technology Vol. 32 (2004), pp.27-29.

[2] H.Y. Dong, Y.L. Ke, J. Sun and Q. Wu: Acta Aeronautica Et Astronautica Sinica Vol. 14 (2004), pp.429-432.

[3] L. Li: Light Alloy Fabrication Technology Vol. 27 (1999), pp.16-18.

[4] Q.C. Wang, Y.L. Ke and Q.F. Zhang : Acta Aeronautica Et Astronautica Sinica Vol. 24(2004), pp.336-338.

[5] S.H. Wang, K.M. Ma and J. Ma: Journal of Air Force Engineering University(Natural Science Edition) Vol. 5(2004), pp.19-21.

[6] M. Koc, J. Culp. and T. Altan: Journal of Materials Processing Technology Vol. 174(2006), pp.342-354.

[7] Y. Shigeru, in: Generation of Residual Stress and its Counterplan(in Chinese). translated by J.P. Zhu and H.M. Shao, China Mechine Press, Beijing (1983).

[8] S.H. Wang, D.W. Zuo, C.S. Run, et al: Journal of Materials Engineering Vol. 10(2004), pp.32-35.

[9] M. B. Prime, M. R. Hill: Scripta Materialia Vol. 46 (2002), p.77－82.

[10] Y.P. Yi, J.H. Yang, Y.C. Lin: Journal of Materials Engineering Vol. 4(2007), pp.20-26.

[11] A. Rusinek, J.A. Rodríguez-Martínez.: Materials and Design Vol. 30(2009), pp.4377-4390.

[12] W.L. Cheng, I. Finnie, in: Residual Stress Measurement and the Slitting Method, Springer (2006).

[13] J.M. Goetz, in: Investigation of Coating Cracking and Fatigue Strength of 7050-T74 Aluminum Alloy with Different Anodize Coating Thicknesses (2005), p.28.