[PDF] Effects Of Variables In Charpy Impact Testing eBook

Author : Enrico Lucon
Publisher :
Page : 10 pages
File Size : 16,63 MB
Release : 2009
Category : Apperception
ISBN :

GET BOOK

An investigation has been conducted on the influence of impact machine variables and specimen positioning on characteristic forces and absorbed energies from instrumented Charpy tests. Brittle and ductile fracture behavior has been investigated by testing NIST reference samples of low-, high-, and super-high-energy levels. Test machine variables included tightness of foundation, anvil and striker bolts, and the position of the center of percussion with respect to the center of strike. For specimen positioning, we tested samples that had been moved away or sideways with respect to the anvils. In order to assess the influence of the various factors, we compared mean values in the reference ("unaltered") and "altered" conditions; for machine variables, t-test analyses were also performed in order to evaluate the statistical significance of the observed differences. Our results indicate that the only circumstance which resulted in variations larger than 5 % for both brittle and ductile specimens is when the sample is not in contact with the anvils. This should be taken into account in future revisions of instrumented Charpy test standards.

Author : H. Liebowitz
Publisher : Academic Press
Page : 774 pages
File Size : 29,83 MB
Release : 2014-05-12
Category : Technology & Engineering
ISBN : 1483273644

GET BOOK

Fracture: An Advanced Treatise, Volume III: Engineering Fundamentals and Environmental Effects provides information pertinent to the engineering fundamentals and environmental effects pertaining to various types of fracture. This book focuses on the fracture design of structures as well as the engineering fundamentals of fracture and environmental effects. Organized into 12 chapters, this volume begins with an overview of the analytical aspects of linear fracture mechanics, which are complete relative to basic formulation and two-dimensional static problems. This text then reviews the fundamental equations of the statics of solids, with emphasis on the idealization of behavior into elastic, plastic, or viscoelastic types. Other chapters consider a notch analysis of fracture. This book discusses as well the three phases of the fracture process. The final chapter deals with environment cracking under static load. This book is a valuable resource for engineers, students, and research workers in industrial organizations, education and research institutions, and various government agencies.

Author : Roger E. Stoller
Publisher : ASTM International
Page : 1315 pages
File Size : 22,43 MB
Release : 1992
Category : Materials
ISBN : 080311477X

GET BOOK

Symposium held in Nashville, Tennessee, June 1990. Almost two-thirds of these 91 papers are authored by researchers outside of the US (including information on research in the former USSR, Japan, and Europe). Topics include: current commercial power reactor systems; microstructural characterization