Creep in Structures 1970: Symposium Gothenburg (Sweden) August 17-21, 1970

ISBN-13: 9783642652738 / Angielski / Miękka / 2011 / 430 str.

Jan Hult

Opis

The first IUTAM Symposium on Creep in Structures was held in Stanford, Cal. 1960 (Proceedings, ed. N. J. HOFF, Springer-Verlag 1962). That meeting reflected an intense research activity in the field of structural creep, and many important results were pre sented. In spite of this progress design rules for high temperature equipment are still often inadequate. Design against creep deformation and creep rupture is all too often based only oli experience and intuition. With technological processes moving into ever higher temperature regions the effects of creep must be given steadily increasing attention. The IUTAM Bureau in 1967 decided to arrange a Second Symposium on Creep in Structures, to be held in Gothenburg under the chairmanship of F. K. G. ODQVIST. This meeting was to take stock of the progress made in the ten years since the first symposium. Notable advances in the establishment of a sound phenomenological theory, refined experimental techniques and several new methods of structural analysis of shells in the creep range gave impetus to this second symposium. Problems of rupture and stability under complex loads had been studied and many new results in these fields were presented and discussed. Attendance was strictly limited to persons active in the field covered by the symposium. Financial support was generously provided by IUTAM, Chalmers University, the Swedish Board for Technical Develonment and four Swedish industrial companies (ASEA, Sand mens Jernverk, Saab-Scania, Volvo)."

Spis treści

Opening Address.- From Stanford 1960 to Gothenburg 1970.- Reflections on the Past and Future of Creep.- Creep Fracture of Anisotropic, Cylindrical Bars under Pure Torque.- An Experimental and Theoretical Investigation of Creep under Uniaxial Stress of a Mg-Alloy.- On the Stress Dependence of the Secondary Creep Rate.- Models for Creep under Intermittent Stress.- On the Prediction of Creep-Rupture Life of Components under Multiaxial Stress.- Steady State Creep of a Fibrous Composite.- Summary of Proceedings of Monday, August 17.- Rheo-Mobility and Structural Creep.- Plasticity Concepts in the Creep Range.- The Derivation of Energy Theorems for Creep Constitutive Relationships.- A Review of Reference Stress Methods for Estimating Creep Deformation.- Redistribution of Reactions at Transient Power-Law Creep.- Creep Rupture.- Sur la Détermination des Caractéristiques de Fluage d’un Matériau Hétéroplastique par l’Essai de Traction Isotherme à Vitesse Constante.- Summary of Proceedings of Tuesday, August 18.- The Creep of Thick-Walled Tubes Subjected to Internal Pressure.- Creep Deformation of a Cylinder under Complex Varying Loading.- Heat Generation due to Cyclic Loading of a Viscoelastic Hollow Sphere.- Summary of Proceedings of Wednesday, August 19.- An Upper Bound Analysis for the Deformation of Smooth Pipe Bends in Creep.- Creep in Torispherical Pressure Vessel Heads.- The Deformation of an Axially Held Strut during Repeated Thermal Cycling at Creep Relaxation Temperature.- Stress Relaxation in Thick-Walled Cylinders and Circular Plates.- The Creep of Shells.- Exact Solutions of Nonlinear Instantaneous and Creep Bending Problems of Plates with Large Deflections.- A Mechanistic Approach to the Effect of Damage on High Stress Creep Fracture.- Time of Total Creep Rupture of a Beam under Combined Load.- Stationary Creep and Creep Rupture of a Thick-Walled Tube under Combined Loadings.- Summary of Proceedings of Thursday, August 20.- Bifurcation and Instability Modes in Thick-Walled Visco-plastic Pressure Vessels.- Quasilinearization and the Computation of the Deflections of Metal Structures Undergoing Creep.- Creep Stability of a Column with Coupled Geometric Imperfection and Material Behavior Effects.- Optimal Structural Design with Respect to Creep Buckling.- Creep Buckling of Imperfect Circular Cylindrical Shells under Non-Uniform External Loads.- Interaction between Axisymmetric and Non-symmetric Creep Buckling of Circular Cylindrical Shells in Axial Compression.- Summary of Proceedings of Friday, August 21.