The multi-scale mechanical properties of double-double layup technology in Type IV fiber-wound pressure vessels

Abstract

This research aims to achieve key technological breakthroughs in hydrogen energy storage and utilization. A progressive homogenisation approach is used for multi-scale damage analysis of Type IV pressure vessels. The study begins at the micro-level, determining material stiffness parameters and damage characteristics. Next, it analyzes damage responses under different layup configurations at the mesoscopic scale, verifying micro-scale parameters. These findings are then extended to the macro-scale using finite element simulations to explore the impact of various layup angles on structural performance. For damage assessment, the Hashin criterion is applied from micro-to macro-levels. Results show that the DD layup structure exhibits a superior stress response under the same pressure compared to isotropic layups. Based on stress and strain analysis, further failure analysis predicts similar failure situations for both layups under multiple damage criteria. Additionally, the DD structure can rationally replace the winding layer of fiber-wound pressure vessels while achieving weight reduction. This approach provides a theoretical reference for lightweight alternative designs of composite pressure vessels.