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TECHNICAL PAPERS

Elastic Bending of Steel-Polymer-Steel (SPS) Laminates to a Constant Curvature

[+] Author and Article Information
M. Weiss1

School of Engineering and Technology,  Deakin University, Geelong, Vic. 3217, Australiamweis@deakin.edu.au

B. F. Rolfe

School of Engineering and Technology,  Deakin University, Geelong, Vic. 3217, Australiabrolfe@deakin.edu.au

M. Dingle

School of Engineering and Technology,  Deakin University, Geelong, Vic. 3217, Australiamdingle@deakin.edu.au

J. L. Duncan

 The University of Auckland, Auckland, New Zealandjl.duncan@xtra.co.nz

1

Corresponding author.

J. Appl. Mech 73(4), 574-579 (Sep 22, 2005) (6 pages) doi:10.1115/1.2164512 History: Received February 22, 2005; Revised September 22, 2005

The shear strain of the interlayer in the elastic regime for a Steel-Polymer-Steel (SPS) laminate material has been studied during bending to a constant curvature. An analytical model is developed and the influence of process parameters are analyzed. The tension in the cover sheets is also determined and, finally, a moment diagram is calculated. The results show that the moment in the SPS laminate is nonuniform along the bent strip even though the curvature is constant because of the tension and compression forces introduced in the cover sheets by the shear reaction force of the interlayer material.

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Copyright © 2006 by American Society of Mechanical Engineers
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References

Figures

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Figure 6

Bending of the SPS laminate material to a constant radius of ρ for a frictionless clamped die

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Figure 7

Moments of the upper and lower cover sheets and the overall moment on an element section of the SPS laminate material

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Figure 8

Plots of the shear strain within the interlayer using the conditions specified in Table 1 for various bend radius and shear modulus

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Figure 9

Tension in the top cover sheet when varying the bend radius and shear modulus

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Figure 10

The moment diagram of the laminate SPS material bent to a circular arc for different values of the bend radius and the shear modulus

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Figure 5

Force equilibrium diagram of both the cover sheet and the interlayer

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Figure 4

Strain distribution in the cover sheet

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Figure 3

Interlayer polymer under shear from the two cover sheets. Midsurface length is ρdθ, and the shear strain is γ, while the change in shear strain is dγ.

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Figure 2

An element of the laminate material bent at a constant radius of curvature

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Figure 1

Section of Steel Polymer Steel (SPS) material. The thickness of the SPS sheet is t, while the thickness of the cover sheets is 2a, and the thickness of the interlayer is 2b. The radius of curvature is ρ.

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