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Three different punches are designed for the hydropiercing experiments and finite element simulations are conducted by finite element program ABAQUS-3D to investigate the influence of punch shape on the fracture surface quality of hydropiercing holes. The results show the fracture burrs are not obvious punched by all the three punches. The collapse punched by the round punch is a little larger than the others. The fracture surface quality punched by the round punch is good with larger smooth zone and the interface between smooth zone and tear zone is even with large gradient. The size of the smooth zone is larger and the interface between smooth zone and tear zone is uneven with large gradient punched by the flat punch. The size of the smooth zone is smaller and the size of the tear zone increases from the first fractured to the last fractured punched by the inclined punch. 相似文献
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通过对3种不同材料的管材液压冲孔的实验研究,分析管材材料性能对液压冲孔质量的影响。研究表明:不同材料对塌陷形成的影响不同,材料的屈服强度越高,液压冲孔后的塌陷越大。塌陷尺寸随着内压的降低而增大,在同一内压下,沿管长方向塌陷变化较慢,沿垂直管长方向塌陷变化快。不同材料对断口质量的影响不同,材料屈服强度越高,断面质量越好,材料较软时,撕裂现象更明显。 相似文献
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