Method for calculating burst strength of plastic liner carbon fiber full-winding high-pressure hydrogen cylinder

By analyzing the fiber stress of a high-pressure hydrogen cylinder with a plastic inner liner fully wrapped with carbon fiber using geodesic winding theory, the problem of predicting burst pressure in existing technologies is solved, enabling accurate calculation and optimized design of the cylinder's burst strength.

CN115169053BActive Publication Date: 2026-06-26CHINA UNIV OF PETROLEUM (EAST CHINA)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (EAST CHINA)
Filing Date
2022-08-01
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing technologies cannot accurately and reasonably predict the burst pressure of high-pressure hydrogen cylinders with plastic liners and carbon fiber full wrapping, which limits the safety and development of the hydrogen energy industry.

Method used

Using geodesic winding theory, the maximum stress of the fibers in a plastic-lined, fully carbon fiber-wound high-pressure hydrogen cylinder under internal pressure is analyzed. By calculating the maximum stress of the fibers in the circumferential and radial directions, the burst strength of the cylinder is estimated, including calculations for the cylinder body and end cap sections.

Benefits of technology

A more intuitive and faster method for predicting the burst strength of gas cylinders is provided, which can optimize gas cylinder design, identify failure location and mode, has small error, and is suitable for engineering applications.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention relates to the field of high-pressure gas cylinder safety assessment technology, specifically to a method for estimating the burst strength of a high-pressure hydrogen cylinder with a plastic-lined, fully carbon fiber-wound liner. The high-pressure hydrogen cylinder with a plastic-lined, fully carbon fiber-wound liner consists of a plastic liner, a spirally wound carbon fiber layer, and a circumferentially wound carbon fiber layer. The inner diameter of the plastic liner is D0, and its outer diameter is D1. The outer diameter of the spirally wound layer is D2, and the outer diameter of the circumferentially wound layer is D3. The plastic liner includes front and rear end sections and a central cylindrical section. The spirally wound layer is fully wound on the end sections and the cylindrical section, while the circumferentially wound layer is only wound on the cylindrical section. The fiber winding adopts geodesic winding theory, and the internal pressure is entirely borne by the fibers. By analyzing and estimating the maximum stress in the circumferential and meridional directions of the fibers under internal pressure, the burst strength of the gas cylinder can be estimated. This invention, through its method for calculating the burst strength of gas cylinders, provides a more convenient, intuitive, and rapid method for predicting the burst strength of gas cylinders.
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