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:
Conclusions 1. It was established that the transition from uniaxial pulsating tension to biaxial tension is accompanied by an increase in the resistance of the metal to cyclic creep and a reduction in resistance to fatigue fracture, which ultimately leads to a reduction in the life of the investigated steels in the p-tests. The superposition of a constant internal pressure on pulsating uniaxial tension actives cyclic creep under these loading conditions compared to the case of uniaxial pulsating tension. 2. It was determined experimentally that for both cyclic and one-time loading, quasistatic fracture of the investigated steels is due to loss of-stability of the process of plastic deformation. 3. A theoretical equation of state was proposed for predicting the life of shell steels of the pearlitic class. The effectiveness of the approach taken here and the satisfactory accuracy of the equation were confirmed by an evaluation of the fatigue life of the steels with allowance for the type of stress state and temperature from the derived equation under quasistatic fracture conditions and by a comparison of the theoretical and experimental findings. 4. It was established that the corrected steady-state creep rate ξi, characterizing the capacity of a metal to accumulate viscoplastic strains, depends on the type of stress state.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01529741
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