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An experimental validation of volume conservation assumption for aluminum alloy sheet metal using digital image correlation method

机译:用数字图像相关法对铝合金板材体积守恒假设进行实验验证

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This article shows an experimental validation of the volume conservation assumption (zero plastic volume change assumption) for aluminum alloy (AA6000) sheet metal. A series of tensile tests were conducted. During the tensile tests, an optimized digital image correlation setup was used to simultaneously measure three principal strain components. The experimental results show that, at locations outside the necking band, AA6000 strictly follows the zero plastic volume change assumption throughout the duration of the test. Inside the necking band, AA6000 follows the zero plastic volume change assumption in the elastic range and early plastic range. However, before failure, a visible volume strain increase can be found inside the necking band, which shows that, in the deep plastic zone, AA6000 does not always follow the volume conservation assumption. The experiment plan, measurement setup optimization, experimental results and data analysis are shown in detail.
机译:本文显示了铝合金(AA6000)钣金的体积守恒假设(零塑性体积变化假设)的实验验证。进行了一系列拉伸试验。在拉伸测试期间,使用优化的数字图像相关设置同时测量三个主要应变分量。实验结果表明,在颈缩带以外的位置,AA6000在整个测试过程中严格遵循零塑料体积变化假设。在缩颈带内,AA6000在弹性范围和早期塑性范围内遵循零塑性体积变化假设。但是,在失效之前,在颈缩带内部可以看到明显的体积应变增加,这表明在深塑料区中,AA6000并不总是遵循体积守恒假设。详细显示了实验计划,测量设置优化,实验结果和数据分析。

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