Forming the Future - Proceedings of the 13th International Conference on the Technology of Plasticity
Forming the Future - Proceedings of the 13th International Conference on the Technology of Plasticity
复制标题
塑造未来——第十三届国际可塑性技术会议论文集
DOI：
10.1007/978-3-030-75381-8_37
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Long H
中科院分区：
文献类型：
--
作者：
Long H
提出了一种新的板料变形测试方法--循环弯曲压缩拉伸试验方法。TCBC方法能够在循环加载下测试材料在拉伸、弯曲和压缩下的变形。通过调整相应的参数，可以独立控制每种变形模式的效果。利用自行研制的TCBC试验台，对AA5251-H22铝合金进行了简单拉伸、循环压缩拉伸、循环弯曲拉伸和循环弯曲压缩拉伸四种不同条件下的拉伸试验。对试件断裂时的最大延伸率和材料塑性变形所需的拉力进行了估算。结果表明，在TCBC条件下，由于压缩下的局部塑性变形延迟了断裂，使最大延伸率显著增加。建立了TCBC试验的有限元模型，以获得应力分布，以解释增强的成形性。这种新的TCBC方法可用于测试类似于双面渐进成形的材料成形性。
A new test method for sheet metal deformation,Tension under Cyclic Bending and Compression (TCBC), is developed in this study. The TCBC method is capable of testing material deformation under tension, bending, and compression with cyclic loading. The effect of each deformation mode can be independently controlled by adjusting corresponding parameters. Using the TCBC test rig developed, aluminium alloy AA5251-H22 is tested under four different testing conditions: simple tension, tension under cyclic compression, tension under cyclic bending, and tension under cyclic bending and compression. The maximum elongation of the tested specimen at fracture and the tensile force required for material plastic deformation are evaluated. The results show that the maximum elongation increases significantly under the TCBC condition due to localised plastic deformation under compression that delays the fracture. Finite element modelling of the TCBC test is developed to obtain stress distributions to explain the enhanced formability. The new TCBC method may be used for testing material formability that resembles double-side incremental forming.