Thermoelastic-Plastic Stress Analysis in a Thermoplastic Composite Disc

Abstract

In this study, an elastic-plastic stress analysis is carried out on a steel fiber-reinforced thermoplastic composite disc under uniform thermal distribution. The composite disc is reinforced by steel fibers curvilinearly. Its mechanical properties are obtained by strain gauges and Instron test machine. The modulus of elasticity in the tangential direction is measured by fitting a solid disc to the composite disc, exactly. However, other material properties are found approximately. The material is assumed to be non work hardening. Stresses are determined for uniform temperature distribution. The magnitude of the tangential stress component in polar coordinates is the highest at the inner points of the disc. Plastic solution is performed numerically. Plastic region begins at the inner surface of the disc. The residual stress component of the tangential stress is the highest at the inner surface of the disc.

Keywords

thermoelastic-plastic steel fiber thermoplastic disc

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References

Ito, T. , Suganuma, T. and Wakashima, K. (2000). A Micromechanics-Based Analysis for Tailoring Glass-Fiber-Reinforced Thermoplastic Laminates with Near Zero Coefficients of Thermal Expansion, Composites Science and Technology, 60: 1851-1861.

Trende, A. , Astrom, B.T. and Nilsson, G. (2000). Modelling of Residual Stresses in Compression Moulded Glass-mat Reinforced Thermoplastics, Composites: Part A, 31: 1241-1254.

Sayman, O. and Kayrici, M. (2000). An Elastic-plastic Stress Analysis in a Thermoplastic Composite Cantilever Beam, Composite Science and Technology, 60: 623-631.

Timoshenko, S.P. and Goodier, J.N. (1970). Theory of Elasticity, McGraw-Hill Company, Singapore.

Genta, G. and Gola, M. (1981). The Stress Distribution in Orthotropic Rotating Disks, Journal of Applied Mechanics, 48: 559-562.

Shabana, Y.M. and Noda, N. (2001). Thermo-elasto-plastic Stresses in Functionally Graded Materials Subjected to Thermal Loading Taking Residual Stresses of Fabrication Process into Consideration, Composites: Part B, 32: 111-121.

Mackin, J.T. , Noe, S.C. , Ball, K.J. and et al. (2002). Thermal Cracking in Disc Brakes, Engineering Failure Analysis, 9(1): 63-76.

Güven, U. and Altay, O. (1998). Linear Hardening Solid Disk with Rigid Casing Subjected to a Uniform Heat Source, Mechanics Research Communications, 25(6): 679-684.

Stanley, P. and Garroch, C. (1999). A Thermoelastic Disc Test for the Mechanical Characterisation of Fibre-reinforced Moulded Composites: Theory, Composites Science and Technology, 59(3): 371-378.

10.

Rossit, C.A. and Laura, P.A. (2000). Unsteady Thermoelastic Analysis of a Circular Disk with a Hot Central Core and Subjected to Adiabatic Conditions, Ocean Engineering, 27(4): 385-391.

11.

Sayman, O. (2003). Elastic-plastic and Residual Stresses in Symmetric Aluminum Metal-matrix Laminated Plates under a Linear Thermal Loading, J. Thermal Stresses, 26(4): 391-406.

12.

Jahed, H. and Shirazi, R. (2001). Loading and Unloading Behaviour of a Thermoplastic Disc, Int. Pressure Vessel and Piping, 78: 637-645.

13.

You, L.H. , Tang, Y.Y. , Zhang, J.J. and Zheng, C.Y. (2000). Numerical Analysis of Elastic-plastic Rotating Disks with Arbitrary Variable Thickness and Density, Int. J. Solids Struct., 37: 7809-7820.

14.

Sing, S.B. and Ray, S. (2002). Modeling the Anisotropy and Creep in Orthotropic Aluminum-silicon Carbide Composite Rotating Disc, Mech. Mater., 34: 363-372.

15.

Lekhnitskii, S.G. (1981). Theory of Elasticity of an Anisotropic Body, Mir Publishers, Moscow.

16.

Gibson, R.F. (1994). Principles of Composite Material Mechanics, Mc Graw-Hill, Inc., Singapore.

17.

Johnson, W. and Mellor, P.B. (1978). Engineering Plasticity, Von Nastrand Reinhold Comp., London.