| 吉文超， 胡江川， 张睿明， 马凯.大壁厚高压储氢球罐瓣片成型变形数值模拟研究[J].轻工机械,2025,43(5):87-95 |
| 大壁厚高压储氢球罐瓣片成型变形数值模拟研究 |
| Numerical Simulation of Flap Molding Deformation in Large Wall Thickness High Pressure Hydrogen Storage Spherical Tanks |
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| DOI：10.3969/j.issn.1005 2895.2025.05.012 |
| 中文关键词: 高压储氢 球罐 大壁厚 等效塑性应变 ABAQUS软件 |
| 英文关键词:high pressure hydrogen storage spherical tank large wall thickness equivalent plastic strain ABAQUS |
| 基金项目:国家重点研发计划课题（2022YFB4003002）。 |
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| 中文摘要: |
| 我国正在攻关25.0 MPa高压储氢球罐设计制造关键技术，该类球罐即使采用抗拉强度达到800 MPa以上的高强度钢，壁厚也达到了90 mm，大壁厚使得球瓣的压制面临困难，而压制过程中产生的较大塑性变形又可能加剧材料的氢脆敏感性。因此，为探究大厚度球瓣成型过程的变形规律，课题组采用有限元分析软件ABAQUS对球瓣的压制成型过程进行动力学模拟，并探究了球瓣和模具尺寸等对塑性变形的影响。结果表明：球瓣上、下表面的等效塑性应变由压制中心向四周减小，但在模具边缘处突增，这主要是由模具边缘几何形状突变引起的应力集中导致的；此外，当模具公称直径增大、曲率半径减小时，球瓣的等效塑性应变显著增大，因此大厚度球瓣的压制宜选用公称直径较小、曲率半径较大的模具。 |
| 英文摘要: |
| At present, China is tackling 25.0 MPa high pressure hydrogen storage tank design and manufacturing key technologies, the ball tanks, even if the tensile strength of 800 MPa or more high strength steel, wall thickness has reached about 90 mm. Large wall thickness makes the ball flap pressing face difficulties, and the significant plastic deformation generated during the pressing process of large plastic deformation may exacerbate the hydrogen embrittlement sensitivity of the material.The finite element analysis software ABAQUS was used to simulate the dynamics of the pressing and forming process of the ball flap, and the effects of the ball flap and mold size on the plastic deformation were investigated. The results show that the equivalent plastic strain on the upper and lower surfaces of the ball flap decreases from the pressing center in all directions, but increases abruptly at the edge of the mold, which is mainly caused by the stress concentration induced by the sudden change in the geometry of the mold edge. In addition, when the nominal diameter of the mold increases and the radius of curvature decreases, the equivalent plastic strain of the ball flap increases significantly, so it is preferable to use a mold with a smaller nominal diameter and a larger radius of curvature for the pressing of large thickness ball flaps. |
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