... of intrinsic fracture toughness in samples that contain significant levels of residual stress. fracture toughness R-curve residual stress aluminum laser shock peening ASTM Special Technical Publication, Vol. 5, No. 8 Paper ID JAI101713 Available online at www.astm.org Michael R. Hill1 and John E...

... to simulate ductile crack growth in fracture specimens and to predict the burst pressure of thin-walled tubular structures containing crack-like defects. ductile fracture crack growth finite elements R -curve pipelines burst pressure crack-tip constraint Claudio Ruggieri I and Eduardo Hippert...

... The objective of this work is to demonstrate the applicability of quantitative fractography and fractal analysis to fracture processes in materials that exhibit R-curve behavior. In-situ toughened silicon nitride and baria-silica glass ceramics are used as model materials to demonstrate...

... This paper describes measurements of the K I R-curve for a layered ceramicmetallic functionally graded material (FGM) composed of Ti and TiB phases. Single edge notch bend specimens were fabricated for crack propagation perpendicular to the graded layers from the brittle to the ductile side...

... An ASTM standard test method for determination of fracture toughness has been created for advanced ceramics. Standard C 1421-99 includes three test methods and is suitable for ceramics with flat R -curve behavior, but includes some provisions for materials with rising R -curve. The three...

..., and the twelve strain gages at 1.5-s intervals. A wideband FM magnetic tape recorder was used to record data from the same sources. The data were analyzed by two different procedures: (1) the plastic zone model based on the residual strength diagram, and (2) the R -curve. The first three tests were used...

... The primary objective of this study was to investigate the residual strength of ARALL-3 and GLARE-2 center-notched panels without stiffeners. The R -curve approach in linear elastic fracture mechanics (LEFM) was used for the residual strength predictions. The applicability of LEFM was verified...

..., since nonlinear deformation due to softening of glass phase and stable crack growth occur, nonlinear fracture mechanics approach should be applied. J IC -value is successfully evaluated according to the R-curve method. fracture toughness test method ceramics stable crack growth high...

... crack length measuring technique, AC potential drop, was investigated. This AC potential drop technique was applied to aluminum test specimens under fatigue cycling conditions as well as monotonic R -curve testing. Aluminum ALCLAD 2024 test specimens of three different specimen geometries were...

... the nonlinear load vs displacement behavior observed experimentally. The fracture of sea ice is characterized by the fracture resistance curve K R . ice sea ice nonlinear fracture mechanics fracture process zone R -curve cohesive crack model Samuel J. DeFranco1 and John P. Dempsey2 THE FRACTURE...

..., are crucial to the successful evaluation of the fracture tests. elevated temperature fracture resistance R -curve work-of-fracture ceramics stable crack growth chevron notch Michael G. Jenkins, 1 Mattison K. Ferber, 2 Asish Ghosh, 3 Jouko T. Peussa,4 and Jonathan A. Salem 5 Chevron-Notched...

... toughness are also discussed. delamination fracture Mode II nonlinearity visco-elastic polymers plastic R -curve test methods composite materials fatigue (materials) fracture Alan J. RusselP Initiation and Growth of Mode II Delamination in Toughened Composites REFERENCE: Russell, A J...

... The initiation toughness ( J Ic ) and the resistance to stable crack growth ( J R -curve) of AISI Type 303 stainless steel were characterized using side-grooved compact-type specimens. The test material was produced by a hot extrusion process which resulted in long cylindrical MnS inclusions...

... by the experimental results for irradiated and unirradiated materials. cladding surface bend bar pressurized thermal shock elastic-plastic fracture R-curve STP1046-EB/May 1990 Donald E. McCabe1 Fracture Resistance of Irradiated Stainless Steel Clad Vessels REFERENCE: McCabe, D. E., "Fracture Resistance...

... This paper presents a simple method for performing elastic R -curve instability calculations. For a single material-structure combination, the calculations can be done on some pocket calculators. On microcomputers and larger, it enables the development of a comprehensive program having...

... for conventional R -curve analysis. fracture mechanics failure assessment diagram key curve R -curve limit load elastic plastic fracture dimensional analysis nonlinear fracture mechanics Donald E. McCabe^ A Viewpoint on the Failure Assessment Diagram REFERENCE: McCabe, D. E., "A Viewpoint on tlie...

... of the present PD 6493 method. 2. Strip yield model. 3. Reference stress approach. All three levels utilize CTOD as the fracture toughness input. Some guidelines for choosing the appropriate assessment level are given. fracture mechanics crack-tip opening displacement R-curve plastic collapse weld...

... temperature may be a factor in damage tolerance and life analysis only under certain conditions. aluminum alloys temperature R -curve fatigue fatigue crack growth spectrum (loading) life prediction damage tolerance retardation James M. Cox, Donald E. Pettit, and Sharon L. Langenbeck Effect...

... The crack growth resistance curve (R-curve) appears to be a viable approach to elastic-plastic fracture analysis. An automated technique for R-curve testing and analysis provides the opportunity to enhance accuracy and resolution while reducing variability due to influences of the test operator...

... An elastic-plastic R-curve instability prediction method is reported. The method is prepared in a format such that the computational steps outlined can be used as a guide to make instability predictions. Three example problems are given. R-curve test procedure instability fracture...