25-62 STUDIUL EFECTULUI TEMPERATURII ÎN APARIŢIA TENSIUNILOR REMANENTE DIN CAZUL DISCURILOR DE GROSIME MICĂ. Partea a II-a: RELAŢII DE CALCUL PENTRU STABILIREA TENSIUNILOR REMANENTE


THE STUDY OF TEMPERATURE EFFECT IN THE RESIDUAL
STRESSES OCCURRENCE FOR THE CASE
OF LOW THICKNESS DISKS
PART II – THE CALCULUS RELATIONS FOR THE RESIDUAL
STRESSES DETERMINATION
In order to determine the stress and deformation state of some
structures one must know the residual stresses due to the temperature. One
considers the situations when the stresses reach the limits imposed by von
Mises criterion; plastic deformations will appear; these have as effect a
redistribution of residual stresses. In order to determine the residual stresses,
theoretical studies and experimental research, based on the section method,
have been done. One has studied the hot laminated structures. Following the
uniform cooling, residual thermal-elastic-plastic stresses appear in the material.
The performed determinations based on the section method lead to high
precision determination of the residual stresses field. The established
theoretical equations were also verified.
Keywords: residual stresses, plastic deformation, criteria, tension of
the membrane, plate
Cuvinte cheie: tensiuni remanente, deformații plastice, criterii, tensiuni
de membrană, placă
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