铝合金管力学性能的拉伸试验研究

Material property investigation of aluminium alloy tubes with tensile test

通过单向拉伸试验获得了LF2M(Φ75 mm×1.5 mm)和LF21M(Φ27 mm×1 mm)两种铝合金管材的基本力学性能。研究了不同数学模型对材料应变硬化曲线的描述能力,发现采用幂函数对LF2M管材试验数据拟合较好,指数函数对LF21M管材试验数据拟合较好;基于单向拉伸试验获得了两种铝合金管材的塑性应变比。为上述两种试验铝合金管材的塑性成形分析提供了实用的材料模型。

Basic material properties of aluminium alloy tubes of LF2M（Φ75 mm×1.5 mm） and LF21M（Φ27 mm×1 mm） were obtained using uniaxial tensile test.Strain hardening curves fitted using different mathematic models and curves obtained by the uniaxial tensile test were compared.The results show that power function is accurate for LF2M tube,while exponent function is appropriate for LF21M tube.Plastic strain ratios for the above tubes were acquired based on uniaxial tensile test.The research provides a practical material model for the forming of LF2M and LF21M aluminum alloy tubes.