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The article deals with the relevance of the stress strain state (SSS) in areas of
potential destruction for the assessment of deformed structures strength. The article develops
a calculation and experimental method for building a combined strength criterion equation
involving strength coefficients, introduced by Pisarenko-Lebedev criterion equation with
regard to the real SSS type. The proposed method has been implementedand experimental
mechanical tests were carried out for the selected samples which follow the idea that the SSS
type in the active zone is identical to the SSS of the analyzed structure in the area of interest.
Results of the calculations and experimental tests demonstrate a significant decrease in the
limit strength value for 50CrV (high quality) under biaxial tension in comparison with the
conventional limit strength value.
Keywords: modeling, stress strain state, limit state equation, prismatic sample, finite element method, strength parameters, biaxial stretching |
full paper (pdf, 1136 Kb)