ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Detailed experiments of fracture toughness in which SENB specimens of five differentthicknesses were included were carried out to investigate the size effect in the ductile to brittletransition temperature region. It is found that the fracture toughness of the upper shelf increases withthe thickness of the specimens with the similar geometry. While the fracture toughness of the lowershelf decreases with the thickness in the range of 4mm to 12mm and then drops up from 12mm to16mm with the appearance of shear lips which present the shearing fracture under the plane stressstate. The tearing modulus dJ/da which determines the resistance to stable crack growth increaseswith the increment of thickness and the reduction of the temperature. The results of the stresstriaxiality increasing with the reduction of the thickness explain well the experimental results
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.33-37.35.pdf
