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Description of Stress-Strain Curves by Three Parameters
Walter Ramberg,William R Osgood +1 more
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In this paper, a simple formula is suggested for describing the stress-strain curve in terms of three parameters; namely, Young's modulus and two secant yield strengths.Abstract:
A simple formula is suggested for describing the stress-strain curve in terms of three parameters; namely, Young's modulus and two secant yield strengths. Dimensionless charts are derived from this formula for determining the stress-strain curve, the tangent modulus, and the reduced modulus of a material for which these three parameters are given. Comparison with the tensile and compressive data on aluminum-alloy, stainless-steel, and carbon-steel sheet in NACA Technical Note No. 840 indicates that the formula is adequate for most of these materials. The formula does not describe the behavior of alclad sheet, which shows a marked change in slope at low stress. It seems probable that more than three parameters will be necessary to represent such stress-strain curves adequately.read more
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Experimental investigation of the time and temperature dependent growth of fatigue cracks in Inconel 718 and mechanism based lifetime prediction
TL;DR: In this article, the growth of cracks in low-cycle fatigue (LCF) and thermomechanical fatigue (TMF) tested specimens of Inconel 718 measured by using the replica method.
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New material models for nonlinear stress-strain behaviour of composite materials
TL;DR: In this paper, two new material models are developed for orthotropic material, where the nonlinear secant mechanical properties are expressed as a function of the plastic energy density of an equivalent linear-elastic system.
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A numerical-informational approach for characterising the ductile behaviour of the T-stub component. Part 2: Parsimonious soft-computing-based metamodel
Julio Fernández-Ceniceros,Andres Sanz-Garcia,F. Antonanzas-Torres,Francisco Javier Martinez-de-Pison +3 more
TL;DR: A numerical-informational method for calculating the ductile response of the T-stub component using a set of metamodels based on soft-computing techniques that constitutes a suitable tool to be implemented in non-linear steel connections software.
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Buckling, postbuckling, and crippling of materially nonlinear laminated composite plates
R.R. Arnold,J. Mayers +1 more
TL;DR: In this paper, a theoretical development and analysis procedure is presented for prediction of buckling, postbuckling and crippling loads in laminated composite plates, which can be used as an aid in the design process, particularly in the isolation of candidate laminates without resorting to extensive and costly test programs.
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Seismic response analysis of nonlinear structures
T.-P. Chang,T. Mochio,E. Samaras +2 more
TL;DR: In this article, a solution method for the response of a class of nonlinear viscoelastic shear building structures subjected to stochastic excitation has been developed by means of a Stochastic equivalent linearization technique.