DAMAGE AND EFFECTIVE STRESS-STRAIN DIAGRAM OF ALUMINUM ALLOY 1520
DOI:
https://doi.org/10.20535/2305-9001.2014.72.37145Keywords:
damage, effective stress, the true diagram, aluminumAbstract
Purpose. The aim is to improve methods of constructing true and effective diagrams, analysis of approaches to determine the parameters of the damage on the aluminum alloy AMg2 specimens.
Design/methodology/approach. To find the effective stress, we need to know the value of true stress and damage parameter.
Effective strain diagram must also construct a curve of damage accumulation. There are different ways of experimental determination of damage, one of the most simple and convenient is to measure the degradations of elastic modulus. All date for calculations obtained from stress-strain curve.
Findings. During the test is not always possible to establish the transverse strain sensor in the place of neck beginning, after the rupture, the measured values of width and thickness of the samples do not match. Table 3 shows the comparison of the results.
Originality/value. Application of the proposed method allows obtaining stress-strain diagram in the coordinates of the effective stress-strain without the use of additional equipment, while giving accurate results. Simplified procedure and reduces the time of the experiment and analyzing the results of the experiment.
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