为研究氢扩散通过圆柱形金属薄膜引起的塑性形变，我们将板壳力学、弹塑性力学、热应力理论与金属—氢相互作用理论相结合，讨论了氢进入金属薄膜后晶格膨胀产生的弹性应力、塑性应力和残余应力及这些应力对氢分布和输运、材料性质的影响。结果表明塑性区中氢的扩散变慢，残余应力改变了样品局域的吸氢热力学性质。在充氢过程中，只有小的充氢流才可能避免材料的塑性损伤。该结果可为氢的提纯、同位素分离以及氢的贮存与输运等应用提供参考。
An elastoplastic self-stress model for hydrogen diffusion across a metallic tube is established. This model includes the elastic, plastic and residual stresses developed during hydrogen insertion into metallic membranes. It is found that the hydrogen diffusion slows down in the plastic region and local thermodynamic properties of metal-hydrogen system are modified at the same time. The plastic stress can be avoided by using small charging current during hydrogen charging processes.
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