Summary
Among the constitutive equations for high strain rate properties of materials under dynamic loading, the’ Overstress Model’ of Malvern[l] and Perzyna[2] is well known because of its simplicity and ability. This model has been widely extended for describing the quasi-static creep behavior under high temperature environment by Chaboche[3], Robinson[4], Bruhns[5], Krempl, McMahon & Yao[6] and Sahashi, Imatani & Inoue[7]. On the other hand,’ Endochronic Model’ of Valanis[8] received attensions because of its ability to predict time-independent plastic deformation under complex loading histories. This model is applied for time-dependent deformations, such as dynamic loading and quasi-static creep behaviors. Wu & Yip[9] applied this model for the dynamic behavior of materials, and Chang, Sugiura & Lee[10] proposed an alternate theory of high strain rate problems. In this’ Endochronic Model’ for dynamic problems, the current stress exists beyond the yield surface, and inelastic strain becomes larger as the stress goes away from the boundary of the static yield surafce. Watanabe & Atluri[11,12] applied’ Endochronic Model’ for quasi-static creep behaviors, where the current stress is confined within the yield surface, and inelatic strain rate will become infinite as the stress approaches to the boundary of yield surface.
This paper gives some theoretical unification of the rate dependent constitutive modeling for dynamic and quasi-static problems developed in’ Overstress Model’ and’ Endochronic Model’. By introducing a new intrinsic time derived from the fundamental stress-strain relation in the integral form,’ Endochronic Model’ is shown to be general enough to relate closely to the previous’ Overstress Model’.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Malvern, L.E.: The propagation of longitudinal waves of plastic deformation in a bar of material exhibiting a strain-rate effect. J. Appl. Mech., ASME 18 (1951) 203.
Perzyna, P.: The constitutive equation for rate sensitive plastic materials. Q. Appl. Math., 20 (1963) 321.
Chaboche, J.L.: Viscoplastic constitutive equations for the description of cyclic and anisotropic behavior of metals. Bull. L’Aca. Pol. Sci., Ser. Sci. Tech., XXV (1977) 33.
Robinson, D.N.: A unified creep-palsticity model for structural metals at high temperature. ORNL TM-5969, (1978)
Bruhns, O. ed.: Constitutive modeling in the range of inelastic deformation — a state of arts report. INTERATOM Rep. RAP-055-D (B) (1984)
Krempl, E.; McMahon, J.J.; Yao, D.: Viscoplasticity based on overstress with a differential growth law for the equilibrium stress. Mech. Mat. 5 (1986) 35.
Sahashi, T.; Imatani, S.; Inoue, T.: A constitutive model accounting for the plasticity-creep interaction condition, and the description of inelastic behavior of 2¼ Cr—1 M o steel. Trans. JSME, A 52-476 (1986) 1126.
Valanis, K.C.: Fundamental consequence of a new intrinsic time measure — plasticity as a limit of the endochronic theory. Arch. Mech. 32 (1980) 171.
Wu, H.C.; Yip, M.C.: Strain rate and strain history effects on the dynamic behavior of metallic materials. Int. J. Solids Struct. 16 (1980) 515.
Chang, K.C.; Sugiura, K.; Lee, G.C.: Rate-dependent material model for structural steel. J. Eng. Mech., ASCE, 115-3 (1989) 465.
Watanabe, O; Atluri, S.N.: Internal time, general internal variable, and multi-yiels-surface theories of plasticity and creep: a unification of concepts. Int. J. Plast. 2 (1986) 37.
Watanabe, O.; Atluri, S.N.: Constitutive modeling of cyclic plasticity and creep, using an internal time concept. Int. J. Plast. 2-2 (1986) 107.
Chaboche, J.L.: Constitutive equations for cyclic plasticity and cyclic viscoplasticity. Int. J. Plast. 5 (1989) 247.
Nouailhas, D.; Policella, H.; Kaczmarek, H.: On the description or cyclic hardening under complex loading histories. Int. Conf. Constitutive Laws for Engineering Materials, Tucson, Arizona, Desai & Gallagher ed. (1983)
Walker, K.P.: Research and development program for non-linear structural modeling with advanced time-temperature dependent constitutive relationships. Repot PWA-5700-50, NASA CR-165533 (1981).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1991 Springer-Verlag, Berlin Heidelberg
About this paper
Cite this paper
Watanabe, O., Atluri, S.N. (1991). Some Unification of Creep Theories Based on Internal Time Concept. In: Życzkowski, M. (eds) Creep in Structures. International Union of Theoretical and Applied Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-84455-3_24
Download citation
DOI: https://doi.org/10.1007/978-3-642-84455-3_24
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-84457-7
Online ISBN: 978-3-642-84455-3
eBook Packages: Springer Book Archive