The Crack Tip Opening Displacement in Elastic-Plastic Fracture Mechanics: Proceedings of the Workshop on the Ctod Methodology Gkss-Forschungszentrum G

ISBN-13: 9783642828201 / Angielski / Miękka / 2011 / 360 str.

K. H. Schwalbe

Opis

In April 1985 two workshop meetings were arranged in two consecutive weeks: the Second CSNI Informal Workshop on Ductile Fracture Test Methods was organised and hosted by OECD, Paris, and chaired by F.J. Loss. It took place on 17th-19th April 1985. It dealt primarily with experimen- tal techniques in elastic-plastic fracture mechanics and standardisation of J and JR-curve tests. In order to enable overseas participants to Ic attend this meeting and the Workshop on the CTOD Methodology the latter was scheduled for 23th-25th April 1985 at the GKSS-Forschungs- zentrum Geesthacht. Thus, a number of participants took part in the debates on the merits of the CTOD concept, having the state-of-the-art of the J-integral philosophy freshly in mind. In this respect, the twin arrangement was very fruitful. Three days were planned for the meeting, in order to have sufficient time for presenting and discussing 27 contributions. Because of the workshop-type of the meeting several contri butions on on- going research were presented which were not intended to be published. The Studiengesellschaft zur F5rderung der Kernenergieverwertung in Schiff- bau und Schiffahrt e.V. (KEST) and the Stiftung Volkswagenwerk generously sponsored the workshop, which is gratefully acknowledged. Thanks are due to GKSS-Forschungszentrum Geesthacht for hosting the meeting.

Spis treści

Crack Tip Examination.- Numerical Evaluation of Crack Tip Opening Displacements: 2D and 3D Applications.- Problems of Numerical CTOD Analyses.- Theoretical Calculation of CTOD Using a Dugdale Model Including Strain Hardening for Surface Cracks.- Dugdale Solutions for Strain Hardening Materials.- Experimental Techniques.- COD Concepts in R-Curve Testing.- On the Experimental Determination of CTOD Based R-Curves.- Relationships Between Various Definitions of the Crack Tip Opening Displacement.- CTOD and Crack Growth Including J-CTOD Relationship.- Evaluation of the Crack-Tip-Opening-Displacement (VR) Resistance Curve Method.- CTOD and J Relationships for a Growing Crack.- Relations Between the Crack Tip Opening Displacement, ?5, and the Modified J, JM.- Application.- A Preliminary Assessment of the Use of the CTOD Criterion in Dynamic Fracture Mechanics.- CTOD Testing of Welds.- Statistical Analysis of Critical CTOD and J Values in SAW C-Mn Steel Welds.- On the Toughness Evaluation of Sulphide-Controlled Fe 510 Steel by Charpy-V-Impact, Fracture Mechanics, and Wide Plate Tests.- The Use of CTOD Methods in Fitness for Purpose Analysis.- The Prediction of Failure Situations Using th CTOD Concept Based on the Engineering Treatment Model (ETM).- Fracture Mechanics Tests on Axially Cracked Pipe Sections Subjected to Internal Pressure.