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Abstract：
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The methods and steps for testing a cold-drawn aluminum rod's mechanical properties at ambient temperature under the condition of large deformation by one-way compression were described and materials constants were obtained.The test result shows that at the beginning,the different friction conditions on the end face affect the height strain of the comprressed specimen largely and it decreases with the increase of the deformation degree.The actual stress-strain curves of a cold-drawn aluminum rod under the condition of large deformation can be expressed more accurate by the hardening curve in index form;loading history has a greater impact on the index hardening rule;the different friction conditions on the end face of the sample impact greatly on the bulging.Polyethylene membrane cushion may reduce significantly the effect of friction.With increasing deformation degree,an obvious increase in bulging will be appeared,but when the deformation reaches a certain value,the bulging degree decreases.
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Reference：
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