by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Washington, DC], [Springfield, Va .
Written in English
|Statement||Alan D. Freed.|
|Series||NASA technical memorandum -- 100794.|
|Contributions||United States. National Aeronautics and Space Administration.|
|The Physical Object|
COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus. This paper extends an existing elastic–viscoplastic (EVP) constitutive model using a state-dependent viscosity parameter to describe the engineering response of undisturbed structured clay. The term structure refers to the effects of fabric and weak cementation bonds between clay by: Journals & Books; Help Download full Get rights and content. Abstract. An alternative to the currently used Perzyna's theory of viscoplasticity for small strains is presented. The plastic strain rate vector is normal to the quasistatic yield surface which in turn may not include the origin. The. viscoplastic. strain. rate. is Cited by: according algorithm analysis applied array assumed beam behaviour BMAT Calculate CALL CARD CARD SET CEK2 Chapter CHECK CODE Compute considered CONTINUE CONV convergence coordinates DATA defined deformation described DIMENSION DIMP direct displacement effective elastic elasto-plastic element stiffness employed equation Evaluate example.
This paper presents an elasto-viscoplastic model for asphalt concrete material undergoing finite strain in an effort to predict the permanent deformation of a pavement structure. The model uses the Perzyna viscoplastic theory and an ordinary Drucker–Prager yield surface. transparent structure. 2. Theory of viscoplasticity In the small-strain theory, the total strain rate˙ε in an elasto–viscoplastic material point may be additively decomposed into an elastic component ε˙el and a viscoplastic component ε˙vp ε˙ =˙εel +˙εvp, (1) where the superimposed dot denotes the time derivative. Progressive failure in elastic–viscoplastic media: from theory to practice Claudio di Prisco and Luca Flessati Statistical charts for determining sample size at various levels of accuracy and confidence in geotechnical site investigation. Search the world's most comprehensive index of full-text books. My library.
The buckling of structures of elastic-viscoplastic materials is a stability problem that does not admit a realistic bifurcation formulation in the classical manner. In the absence of imperfections and inertial effects, the standard bifurcation criterion leads only to elastic buckling since an instantaneous jump in strain rate would develop at. The mathematical structure of this theory is concise and similar to that of the infinitesimal viscoplastic theory. These characteristics make the numerical implementation of this theory easy. This book contains a wealth of useful information on current research on viscoelasticity. By covering a broad variety of rheology, non-Newtonian fluid mechanics and viscoelasticity-related topics, this book is addressed to a wide spectrum of academic and applied researchers and scientists but it could also prove useful to industry specialists. The subject areas include, theory, simulations. Purchase Buckling of Structures, Volume 19 - 1st Edition. Print Book & E-Book. ISBN ,