Analytical and experimental fracture mechanics : proceedings of an International Conference on Analytical and Experimental Fracture Mechanics held at the Hotel Midal Palace, Rome, Italy, June 23-27, 1980
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Analytical and experimental fracture mechanics : proceedings of an International Conference on Analytical and Experimental Fracture Mechanics held at the Hotel Midal Palace, Rome, Italy, June 23-27, 1980
Sijthoff & Norrdhoff, 1981
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内容説明
This International Conference on Analytical and Experimental Fracture Me chanics was organized jointly by the Centro Sperimentale Metallurgico, S. p. A. , Lehigh University and Italsider S. p. A. It took place at the Hotel Midas Palace in Rome, Italy, during 23-27 June, 1980. There were more than 150 attendees from 19 different countries: Australia, Austria, Belgium, Canada, People's Re public of China, Czechoslovakia, Finland, Federal Republic of Germany, Hungary, Israel, Italy, Japan, The Netherlands, Poland, Switzerland, Turkey, UK, USA and USSR. Dr. G. M. Costa from Finsider officially opened the Conference and gave the Welcome Address. More than 70 technical papers were presented at three con current sessions. There were six plenary lectures that helped to integrate the diverse efforts, e. g. , analytical fracture mechanics, testing methods, metallur gical effects, corrosion fatigue, dynamic crack propagation and weldments of in dividual researchers. In addition to providing an overall view of the current status of fracture mechanics technology, particular emphasis was given to methods of controlling fracture in gas pipeline structures. The members of the Organizing Committee made a special effort to organize a panel discussion on the application of fracture mechanics technology to the safe design of large diameter pipelines. Dr. Michele Civallero from Italsider and Professor George C. Sih from Lehigh University served as panel Co-Chairmen and delivered survey lectures to stimulate questions from the audience.
目次
Plenary Lectures.- The analytical aspects of macrofracture mechanics.- Fracture mechanics test technique.- On the metallurgical design of steels with high fracture toughness.- Application of fracture mechanics to fatigue, corrosion-fatigue and hydrogen embrittlement.- Dynamic crack propagation in line pipe.- Fracture mechanics approach to the characterization of new welding procedures.- Survey Lectures: Panel Discussion.- Future demand of pipeline steels and associated research problems.- Fracture mechanics in pipeline technology.- Section I Ductile Fracture.- Distribution of plastic deformation around a notch tip.- Ductile fracture at an angled slit in a sheet under tension.- Observations of ductile mechanisms of stable crack growth in two phase alloys.- Fractography and mechanisms of environment-assisted crack growth in A508-2 pressure vessel steel in reactor grade water.- Section II Fracture Analysis.- A fracture mechanics description of material damage in absence of a macrodefect as a collective of microdefects.- Criteria for predicting crack extension angle and path in plane crack problem.- Plastic collapse loads for edge cracked plates subjected to tension and bend loading, and their application to the failure assessment diagram.- Thermally induced crack curving in brittle solids.- The experimental research of constant strain controlled low cycle fatigue of steels.- Applicability and verification of the maximum shear stress criterion for crack extension.- Elastic-plastic characterization of nuclear vessel steels.- Residual strength of surface crack specimens.- Fracture mechanical analysis and experiments on stress rupture life of precracked superalloy components.- Section III Fatigue Crack Propagation.- Crack propagation in commercial grade aluminum.- The nucleation of fatigue cracks in a low-alloy steel under high-cycle fatigue conditions and torsional loading.- Residual life assessment of flawed rolling mill rolls.- Fatigue crack propagation in forged structural steel.- Frequency effects on crack propagation.- Fatigue crack growth and threshold under mode II loading.- Propagation of a crack nucleated within the specimen body.- The elementary physical hypotheses governing the continuum mechanics of subcritical flaw growth phenomena in corrosive material-environmental systems.- Section IV Fatigue Analysis.- Statistical approach to fatigue fracture initiation and propagation.- Fatigue evolution of multicracked frame-structures.- A study of crack closure following overloads.- Opening and mixed-mode fatigue crack growth of surface cracks in a hollow tube.- Section V Metallurgical Effects.- Influence of inclusion type on fracture toughness indices of low alloy steels.- The influence of the microstructure on the fracture toughness of a bainitic steel.- Influence of the microstructure of high strength aluminum alloys on fatigue crack propagation under variable amplitude loading.- A microstructural analysis of cleavage crack propagation in a bainitic pressure vessel steel.- Section VI Toughness and Dynamic Testing.- Fracture toughness testing of austenitic stainless steel.- Measurement of dynamic fracture toughness applying acoustic emission techniques.- On the fracture of laminated Charpy V notch specimens.- Toughness specification for shear fracture arrest in pipelines.- Evaluation of shear crack arrest capability of control rolled line pipe steel.- Survey and tentative revisal of ductile fracture arrest prevision criteria in pipelines for gas transmission.- Ductile fracture propagation in pipelines: results of instrumented full-scale burst tests on 48? and 56? diameter pipes for gas transmission.- Section VII Weldments.- An evaluation of air and underwater welds toughness of structural steels by fracture mechanics and wide plate tests.- Measurement of crack opening displacement in weldments with particular reference to offshore structures.- An investigation of the electron beam welded joint of the stainless sintered steel.- Section VIII Structural Problems.- Evaluation of defect tolerance on structures by means of C.O.D. and wide plates tests.- Wheel/rail impact loads: a contributory cause of rail fracture.- Fracture mechanics approach to the plastic instability of surface notched pipelines during hydrotests.- Fracture toughness of high-strength steels for thin-walled tubes.- One way of fracture mechanics, as it is used in the Hungarian bus development.- Section IX Experimental Methods.- Experimental investigation of biaxial impact in plates.- Observations on crack shapes and stress intensity distributions during stable flaw growth.- K-determination from crack-tip moire fringe patterns.- Experimental determination of high loading rate effects on fracture toughness of aluminium alloys.- Measurement of fracture initiation and propagation parameters from fracture kinematics.- Dynamic fracture of cracked beam under electromagnetic force.- Section X Analytical Modeling.- Fast fracture of a strip of viscoplastic work-hardening material.- Size effect in fracture toughness testing: a dimensional analysis approach.- Comparative study of models for tensile quasi-static fracture.- Method of specific potential energy.- Section XI Boundary Value Problems.- A cracked surface layer bonded to a cracked half space.- Biaxial load effects on the behaviour of fracture caused by cracks on circular interfaces.- The stress intensity factor for a penny shaped crack in a finitely deformed elastic body under the action of body forces.- The longitudinal shear problem of bimaterial media with radial arrays of cracks.- Section XII Numerical Analysis.- Finite element analysis and experimental verification of quasistatic thermal crack growth in a two-phase medium.- Prediction of crack propagation path (numerical analyses and experiments).- Numerical estimation of stress intensity factors by finite difference Eulerian method (the HELP code).- Section XIII Nonmetals and Composites.- On the stability, crack opening displacement and volume of a large open hydraulic penny-shaped fracture in the earth's crust.- Application of fracture mechanics to wood.- Brittle fracture in ductile polymeric solids produced by sandwich layers.- Morphology and molecular weight in the high speed fracture mechanics of polypropylene.- Fracture of composites with rigid inclusions having cuspidal points.- Correlation between bending strength of glass and crack frequency near Vickers indentations.- List of Participants.
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