ISSN:
1573-9325
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The effect of the form of stressed state on energy transformation in deformed body steel 15Kh2MFA in different states connected with merging of defects and crack development is considered. It is shown that independent of the structural state of body steel there are physically substantiated dependences between steel crack resistance characteristics determined from the descending section of total deformation diagrams (parameter Kλ) and stiffness of the material stressed state at the instant of crack initiation (parameter $$K_\sigma = \sigma _m /\mathop \sigma \limits^\_ $$ ). These dependences with the maximum possible restraint in the zone of crack initiation tend towards asymptotes corresponding to the values of critical stress intensity factor KIc for steels. Experimental results confirm the scheme suggested previously by the authors according to which the whole region of possible values of crack resistance characteristics for a material corresponding to difference stiffness of the stressed state and operating time may be presented on coordinates Kλ−Kσ.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00775126
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