Abstract
Mechanical properties of specimens were researched for model analysis of stress-strain behavior in the stress concentration zone for plate structures using aluminum alloys. Traditional and new structure materials including Russian (1915T and 1565ch) and foreign (6082 – Russian analogue AD35) developments with different alloyage systems (Al-Mg, Al-Mg-Si and Al-Zn-Mg accordingly), strengthening methods, corrosive resistances and welding capacities are studied. Strain and fracture resistance is shown for axial and eccentric tension and for impact bending in the temperature range from -70 to +20°C. Acquired results allow us to designate loads reasonably for structure design using aluminum alloys and estimate their durability.
Highlights
Working capacity of structure element is its capacity to resist limit states which bounds structure’s normal service
Comparing structure strength according to SP limited by tension tests results at +20°C shows that strengthened by heat treatment alloy 1915T has the highest design resistance
For alloy grades AVM and AVT1 design strength is 70 and 170 N/mm2 depending on supply condition among strengthened by heat treatment alloyage system Al-Mg-Si with good performance properties which are mostly used in building structures
Summary
Working capacity of structure element is its capacity to resist limit states which bounds structure’s normal service. The fact that aluminum alloys have higher specific strength and corrosion resistance than carbon and low-alloy steel is stated in Russian design codes (SP) [2]. Design codes have recommendations for choice of aluminum alloy grades both strengthened by heat treatment and not with design resistance from 25 to 195 N/mm. Design codes have recommendations for choice of aluminum alloy grades both strengthened by heat treatment and not with design resistance from 25 to 195 N/mm2 Having equal mass they have three times higher specific stiffness than steel, so aluminum alloys use allow to achieve dramatic decline in structure mass. Alloy 6082 has the highest strength in this alloyage system based on data from [3, 4]
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