A stress-strain test method for a metal hydride hydrogen storage tank

Abstract

The invention belongs to the metal hydride hydrogen storage pot safety evaluation technology field and especially relates to a metal hydride hydrogen storage pot stress strain test method. In the stress strain test method, strain gauges are mainly and selectively pasted on key positions of a straight cylinder of a pot body, a convex surface, a weld joint, a position near a corner and the like; andthe strain gauges applied to a water area environment are protected through arranging a water absorbent in a waterproof glue. Through filling or sending out quantitative hydrogen in and from a metalhydride hydrogen storage pot at intervals, a strain change value of a hydrogen storage pot surface is tested, a change rule of a metal hydride hydrogen storage pot surface strain along with a hydrogenstorage amount is acquired and then safety of the metal hydride hydrogen storage pot during a usage process is determined. By using the stress strain test method, a strain of each key position on thehydrogen storage pot can be tested in a targeted mode, strain test points are reduced and test efficiency is increased.

Description

technical field [0001] The invention belongs to the technical field of safety evaluation of metal hydride hydrogen storage tanks, and in particular relates to a method for testing stress and strain of metal hydride hydrogen storage tanks. Background technique [0002] The safety evaluation technology of metal hydride hydrogen storage tanks is one of the key bottlenecks restricting its popularization and application. Since the metal hydride filled in the metal hydride hydrogen storage tank will have a large degree of lattice expansion during the hydrogen absorption process, resulting in the overall expansion of the metal hydride bed in the hydrogen storage tank, this expansion will generate huge stress. Acting on the tank body of the metal hydride hydrogen storage tank, it is manifested as the expansion of the tank body. With the increase of the hydrogen storage capacity, the stress accumulated in the metal hydride bed becomes larger and larger, and the stress on the hydrogen...

AI Technical Summary

Problems solved by technology

Since the metal hydride filled in the metal hydride hydrogen storage tank will have a large degree of lattice expansion during the hydrogen absorption process, resulting in the overall expansion of the metal hydride bed in the hydrogen storage tank, this expansion will generate huge stress. Acting on the tank body of the metal hydride hydrogen storage tank, it is manifested as the expansion of the tank body. With the increase of the hydrogen storage capacity, the stress accumulated in the metal hydride bed becomes larger and larger, and the stress on the hydrogen storage tank body It also continues to increase, leading to an increase in the expansion of the tank. When the expansion of the tank exceeds a certain value, the tank will be deformed or even ruptured, causing the hydrogen storage tank to fail.

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