Early warning detection method for stress overload of high-pressure composite material gas cylinder

• Main Authors: HAN WENQIN, YANG LIANG, HU KEJUN, ZHU FUXIAN
• Format: Patent
• Language: Chinese; English
• Published: 14.01.2020
• Subjects: ALARM SYSTEMS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; ORDER TELEGRAPHS; PHYSICS; SIGNALLING; SIGNALLING OR CALLING SYSTEMS; TESTING

The invention belongs to the technical field of safety assessment of high-pressure composite material gas cylinder, and particularly relates to an early warning detection method for stress overload ofthe high-pressure composite material gas cylinder, which includes the following steps: Step 1: a finite element model of the gas cylinder is established through the fiber winding process, and the location and direction of the gas cylinder strain under the ultimate pressure are determined through finite element analysis; Step 2: the unidirectional carbon fiber and unidirectional glass fiber prepreg sheet are selected according to the strain value, and by the autoclave forming process, a unidirectional carbon fiber / glass fiber hybrid composite board is made; Step 3: the unidirectional carbonfiber / glass fiber hybrid composite board is pasted on the surface of a tensile sample of the composite material, a tensile test is performed on the sample, the damage evolution of the carbon fiber layer in the hybrid laminat