U字曲げ試験による板材の変形抵抗曲線の簡便な推定方法

概要

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A simple method for measuring flow stress curves of metal plates based on the U-shape bending test is proposed. In this method, the bending load and the punch stroke measured in the bending test are converted into flow stress and equivalent strain by using calibration curves. The calibration curves are derived from finite element simulations of plate bending of materials with different work-hardening exponents. The flow stress at strains of up to 0.2 can be measured. The advantage of the present method is that simple rectangular specimens can be used and it can be applied directly to three-roll bending. The flow stresses of carbon steels and aluminium alloy plates of 3-6mm thickness obtained by this method agree with those obtained from the corresponding tensile test within an error of ±7%.
一般社団法人日本機械学会の論文
1995-10-25