Paper 52: Combined Stress Creep Experiments on Viscoelastic Material with Abrupt Changes in State of Stress

Findley W. N. Khosla G. ‘Application of the superposition principle and theories of mechanical equation of state, strain and time hardening to creep of plastics under changing loads’, J. appl. Phys. July 1955 26, No. 7 821.

Drucker D. C. ‘A more fundamental approach to plastic stress-strain relations’, Proc. First. U.S. Nat. Congr. Appl. Mech. 1951, 487 (Amer. Soc. mech. Engrs).

Bertsch P. K. Findley W. N. ‘An experimental study of subsequent yield surfaces: Corners, normality, Bauschinger and allied effects’, Proc. Fourth U.S. Nat. Congr. Appl. Mech., 1962 (in press) (Amer. Soc. mech. Engrs).

Green E. A. Rivlin R. S. ‘The mechanics of nonlinear materials with memory, Part III’, Archive for rational mechanics and analysis 1960 4, No. 5, 387.

See, for instance: Muki R. Sternberg E. ‘On transient thermal stresses in viscoelastic materials with temperature-dependent properties’, J. appl. Mech. June 1961, 193.

Alfrey T. Mechanical Behaviour of High Polymers 1948(Interscience Publishers, New York).

Lee E. H. ‘Stress analysis for viscoelastic bodies’, in Viscoelasticity (ed. Bergen J. T. ) 1960, 1 (Academic Press, New York).

Freudenthal A. M. Geiringer H. ‘The mathematical theories of the inelastic continuum’, Handbuch der Physik 1958 VI, 229 (Springer, Berlin).

Gross B. Mathematical structure of the theories of viscoelasticity 1953 (Herman, Paris).

Schwarzl F. Staverman A. J. ‘Time-temperature dependence of linear viscoelastic behaviour’, J. appl. Phys. 1952 23, 8, 838.

Bland D. R. The theory of linear viscoelasticity 1960 (Pergamon Press, New York).

Pao Y. H. Marin J. ‘An analytical theory of the creep and deformation of materials’, J. appl. Mech. June 1953 20, No. 2, 245.

Findley W. N. ‘Stress relaxation and combined stress creep of plastics’, S.P.E. Journal February 1960 16, No. 2, 192 (Polymer Science Feature).

Findley W. N. Gjelsvik A. ‘A versatile bi-axial testing machine for investigation of plasticity, creep or relaxation of materials under variable loading paths’, Final Report on Contract No. DA-19-020-501-ORD-4595, August 1961 (Picatinny Arsenal, Ordnance Corps, Department of the Army).

Also: ‘A bi-axial testing machine for plasticity, creep or relaxation under variable principal-stress ratios’, Proc. Amer. Soc. Test. Mater. 1962(in press).

Findley W. N. Reed R. M. ‘Concerning strain gauge measurement of creep of plastics’, Experimental Mechanics (journal of the Society for Experimental Stress Analysis) 1963, 29.

O'Connor D. G. Findley W. N. ‘Influence of normal stress on creep in tension and compression of polyethylene and rigid polyvinyl chloride copolymer’, Trans. Amer. Soc. mech. Engrs, J. Engng Indus. May 1962 84, Series B, No. 2, 237.

Findley W. N. ‘Mechanism and mechanics of creep of plastics’, S.P.E. Journal January 1960 16, No. 1, 57 (Polymer Science Feature).

Findley W. N. Peterson D. B. ‘Prediction of long-time creep with ten-year creep data on four plastic laminates’, Proc. Amer. Soc. Test. Mater. 1958 58, 841.

Poynting J. H. ‘On pressure perpendicular to the shear planes in finite pure shears, and on the lengthening of loaded wires when twisted’, Proc. roy. Soc. 1909 82, A, 546;.

and ‘On the changes in the dimensions of a steel wire when twisted, and on the pressure of distortional waves in steel’, Proc. roy. Soc. 1912 86, A, 534.