Author: Vasanth S. KothnurPublisher:
ISBN:
Category : Stainless steel
Languages : en
Pages : 290
Book Description
An Experimental and Computational Investigation of Dynamic Ductile Fracture in Stainless Steel Welds
Author: Vasanth S. KothnurPublisher:
ISBN:
Category : Stainless steel
Languages : en
Pages : 290
Book Description
Dissertation Abstracts International
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 712
Book Description
Scientific and Technical Aerospace Reports
Author: Investigation of Ductile Fracture Properties of Welded Type 304 Stainless Steel Pipe and Large Plan Compact Specimens
Author: JP. GudasPublisher:
ISBN:
Category : Compact specimen
Languages : en
Pages : 17
Book Description
An experimental investigation was performed to evaluate the J-integral resistance curve behavior of 10-cm (4-in.) nominal pipe size Schedule 80 welded Type 304 stainless steel pipe. Tests were performed in four-point bending at 288°C (550°F) on 1219-mm (48-in.)-long pipe specimens with machined flaws contained in circumferential welds. Two flaw geometries were investigated. The first was a through-wall crack growing circumferentially (simple) and the second was a 360-deg part-through radial crack superimposed on a through-wall circumferential crack (complex). During the tests load, load line displacement, crack mouth opening displacement, and electrical potential drop across the crack mouth were monitored. Elastic compliance and direct current potential-drop (DCPD) techniques were used simultaneously to estimate crack extension during the tests. Pipes containing simple cracks had an average J-initiation of 1120 kJ/m2 (6400 in. . lb/in.2). The presence of the complex crack reduced the J-initiation level by approximately a factor of four and also reduced the apparent tearing modulus significantly as compared to pipes containing simple cracks.
American Doctoral Dissertations
Author: Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 776
Book Description
Wein
Author: Characterization of Deformation and Failure of Stainless Steel Welds
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 11
Book Description
Kolsky bar experiments have been used to determine the high-strain-rate response of AL6XN welds - including the base material, the heat-affected zone, and the weld. A finite element model for analyzing ductile fracture near the weld as been developed and implemented as a material routine VUMAT in ABAQUS/Explicit. The FE model involves a Gurson-type constitutive description for porous materials, combined with a microstructural length scale and an upper pound approach for modeling the onset and evolution of void coalescence. This model appears to provide a promising description of dynamic failure of butt-welded stainless steel plates. In a second investigation, pressure-shear plate impact experiments have been used to determine the shearing resistance of an epoxy and two vinyl esters at strain rates of 100,000/sec. This shearing resistance has been shown to increase significantly with increasing pressure.
Ductile Fracture
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 11
Book Description
Modeling and computational tools were developed to carry out analyses of dynamic ductile fracture and brittle-ductile transitions without using any ad hoc crack growth criteria. Among the key results obtained were: (1) prediction of a non-monotonic size effect in dynamic ductile failure processes, (2) resolution of an apparent paradox where under certain loading conditions steels, and other materials, exhibit brittle failure at low loading rates and ductile failure at high loading rates and (3) three dimensional simulations of dynamic crack growth that, for the first time, illustrate shear lip formation and relate what is seen on the surface with what is happening in the interior, which is generally inaccessible in an experiment. Analyses of deformation and failure in metal matrix composites revealed that the development of hydrostatic tension fields arising from constrained plastic flow play a key role in determining the deformation and failure behavior of these materials. Detailed comparisons with experiment showed that our analyses provide remarkably accurate predictions of composite behavior and rationalize experimentally observed trends, such as the relative insensitivity of composite yield strength to changes in matrix microstructure and the dependence of ductility on the morphology and distribution of the reinforcement.
Fracture Mechanics Technology Applied to Material Evaluation and Structure Design
Author: George C. SihPublisher: Springer Science & Business Media
ISBN: 9400969147
Category : Science
Languages : en
Pages : 666
Book Description
The International Conference on Fracture Mechanics Technology Applied to Material Evaluation and Structure Design was held in Melbourne, Australia, from August 10 to 13, 1982. It was sponsored jointly by the Australian Fracture Group and Institute of Fracture and Solid Mechanics at Lehigh University. Pro fessor G. C. Sih of Lehigh University, Drs. N. E. Ryan and R. Jones of Aeronau tical Research Laboratories served as Co-Chairmen. They initiated the organiza tion of this international event to provide an opportunity for the practitioners, engineers and interested individuals to present and discuss recent advances in the evaluation of material and structure damage originating from defects or cracks. Particular emphases were placed on applying the fracture mechanics tech nology for assessing interactions between material properties, design and opera tional requirements. It is timely to hold such a Conference in Australia as she embarks on technology extensive industries where safeguarding structures from pre mature and unexpected failure is essential from both the technical and economical points. view The application of system-type approach to failure control owes much of its success to fracture mechanics. It is now generally accepted that the discipline, when properly implemented, provides a sound engineering basis for accounting in teractions between material properties, design, fabrication, inspection and op erational requirements. The approach offers effective solutions for design and maintenance of large-scale energy generation plants, mining machineries, oil ex ploration and retrieval equipments, land, sea and air transport vehicles.
Author: