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<p>Recently, hydrogen compressors with high compression efficiency and durability have been developed to meet the demand for the expansion of hydrogen charging infrastructure. The compressor bellows consists of repeatedly welded diaphragms, which are produced by forming and blanking processes. This paper describes the process of obtaining the damage model parameter, which is a crucial material and process parameter for the numerical simulation of the precision blanking process. The circular hole blanking experiment was conducted to obtain shearing load and fracture surface measurement. Identical FEM simulation is conducted to obtain the damage model parameter to match the shearing load and fracture surface measurement. The clear difference observed in shearing load between experiment and simulation, especially in early stage of process. The elastic deformation of the equipment, including the die and press, affects heavily on early stage of blanking due to the thin plate thickness. Artificial spring is introduced to compensate for the elastic deformation of equipment. The stiffness and dimensions of artificial spring is determined by repeating simulations to match not only the shearing load but also the shearing surface measurement.</p>

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Determination of Damage Model Parameter for the Blanking Simulation of Thin Plate

  • 期刊论文

  • 发表日期：

    2025年6月13日

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  • Yong Gwan Kim,
  • Hoon Jae Park,
  • Kang Eun Kim,
  • Myeong Pyo Hong,
  • Gyeong Pil Kang,
  • Kyunghoon Lee

摘要

Recently, hydrogen compressors with high compression efficiency and durability have been developed to meet the demand for the expansion of hydrogen charging infrastructure. The compressor bellows consists of repeatedly welded diaphragms, which are produced by forming and blanking processes. This paper describes the process of obtaining the damage model parameter, which is a crucial material and process parameter for the numerical simulation of the precision blanking process. The circular hole blanking experiment was conducted to obtain shearing load and fracture surface measurement. Identical FEM simulation is conducted to obtain the damage model parameter to match the shearing load and fracture surface measurement. The clear difference observed in shearing load between experiment and simulation, especially in early stage of process. The elastic deformation of the equipment, including the die and press, affects heavily on early stage of blanking due to the thin plate thickness. Artificial spring is introduced to compensate for the elastic deformation of equipment. The stiffness and dimensions of artificial spring is determined by repeating simulations to match not only the shearing load but also the shearing surface measurement.