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<p>The reverse osmosis membranes’ structural stability has a significant effect during seawater desalination. In order to quantitatively investigate the mechanical behavior and burst pressure of polyamide reverse osmosis membranes, this research conducted quasi-static mechanical tests on the material. The numerical simulation technology is used to analyze the stress state of the membrane under different osmotic pressures. The effect of the membrane diameter on the burst pressure is revealed. The results show that the tensile strength of polyamide reverse osmosis membranes is 78.4 MPa, and the fracture strain is 0.13. The material parameters obtained by the particle swarm optimization algorithm can describe the mechanical behavior of the membrane. The stress inside the membrane increases significantly with the increase in osmotic pressure. As the diameter of the reverse osmosis membrane increases from 50 mm to 300 mm, the burst pressure decreases from 1.58 bar to 0.42 bar. The increase in the diameter of the reverse osmosis membrane leads to an increase in the axial and circumferential stresses under the same loading, thereby causing a decrease in the burst pressure.</p>

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Prediction of burst pressure for reverse osmosis membranes based on the numerical simulation

  • 期刊论文

  • 发表日期：

    2026年6月19日

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  • Han Zhao,
  • Chungang Xie,
  • Shuai Yang,
  • Heli Zhao,
  • Kun Li,
  • Yuxuan Zhu

摘要

The reverse osmosis membranes’ structural stability has a significant effect during seawater desalination. In order to quantitatively investigate the mechanical behavior and burst pressure of polyamide reverse osmosis membranes, this research conducted quasi-static mechanical tests on the material. The numerical simulation technology is used to analyze the stress state of the membrane under different osmotic pressures. The effect of the membrane diameter on the burst pressure is revealed. The results show that the tensile strength of polyamide reverse osmosis membranes is 78.4 MPa, and the fracture strain is 0.13. The material parameters obtained by the particle swarm optimization algorithm can describe the mechanical behavior of the membrane. The stress inside the membrane increases significantly with the increase in osmotic pressure. As the diameter of the reverse osmosis membrane increases from 50 mm to 300 mm, the burst pressure decreases from 1.58 bar to 0.42 bar. The increase in the diameter of the reverse osmosis membrane leads to an increase in the axial and circumferential stresses under the same loading, thereby causing a decrease in the burst pressure.