بررسی اثر باشینگر در لوله های اتوفرتاژ شده از جنس آلیاژ آلومینیومA7075 با استفاده از داده های تجربی

A7075 aluminum alloy is considered as a high-strength alloywhich is used in manufacturing of under-pressure tubes according to astm b210m–05 standard. finding an appropriate model for investigating bauschinger effect factor in a7075 aluminum alloy behavior plays an important role in the analyzing the process of autofrettaged tubes. in this paper to do that, the results of experimental data of uniaxial tension- compression tests have been used. in order to carry out the tests, an instron servo-hydraulic machine has been used. the samples were made having 12.5 mm based on astm standard e8m-97a. the fact that the plastic strain created in these alloys is considered as unloading characteristic, hence to model the material behavior, the experiments have been done by different amonts of plastic strain. in this research, the experiments were done at total strains up to 4.3%. also, some important parameters including the effect of plastic strain on determining young’s modulus and bauschinger effect factor were tested. in this paper, to determine the amount of tension- compression yield, the amount of offset has been considered as 0.01%.