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Non-destructive Evaluation of composite pressure vessel by Using FBG Sensors

Chinese Journal of Aeronautics 2007年第2期20卷 120-123页

作者： HAO Jun-cai LENG Jin-song WEI Zhang Center for composite Materials and Structures Harbin Institute of Technology Harbin 150080 China Harbin Aviation lndustry Co. LTD Harbin 150080 China

In recent years, advanced composite structures are used extensively in many industries such as aerospace, aircraft, automobile, pipeline and civil engineering. Reliability and safety are crucial requirements posed by them to the advanced composite structures be- cause of their harsh working conditions. Therefore, as a very important measure, structural health monitoring （SHM） in-service is deft- nitely demanded for ensuring their safe working in-situ. In this paper, fiber Bragg grating （FBG） sensors are surface-mounted on the hoop and in the axial directions of a FRP pressure vessel to monitor the strain status during its pressurization. The experimental results show that the FBG sensors could be used to monitor the strain development and determine the ultimate failure strain of the composite pressure vessel.

关键词： fiber optic sensor fiber Bragg grating composite pressure vessel non-destructive evaluation

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Study on thermal boundary condition of manufacture process for composite pressure vessel

Study on thermal boundary condition of manufacture process f...

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2011 International Conference on Advanced Materials and Computer Science(ICAMCS 2011)

作者： Li Ma Luju He Haibo Wang School of Physics and Electronic Engineering Taizhou University

The heat convection was the main heat exchange in the autoclave by which composite pressure vessel was cured. To determine the heat convection coefficient, the combination of theoretical calculation and temperature test is absolutely necessaryIn the theoretical calculation, the determination of the heat convection coefficient is considered as an inversion problem of thermal conduction. By adjusting convection coefficient value in the finite element calculation, optimization method was employed to obtain a good agreement between calculated temperature and measured temperatureIn the temperature test, the metallic liner of pressure vessel was used as test component to record temperature data which was compared with the calculated temperature. The results present the equivalent thermal boundary condition for the simulation of curing process of pressure vessel.

关键词： composite pressure vessel numerical simulation metallic liner thermal condition

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Theoretical study of failure in composite pressure vessels subjected to low-velocity impact and internal pressure

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Frontiers of Structural and Civil Engineering 2020年第6期14卷 1349-1358页

作者： Roham RAFIEE Hossein RASHEDI Shiva REZAEE composites Research Laboratory Faculty o f New Science&TechnologiesUniversity o f TehranTehran ***Iran

A theoretical solution is aimed to be developed in this research for predicting the failure in internally pressurized composite pressure vessels exposed to low-velocity *** in-plane and out-of-plane failure modes are taken into account simultaneously and thus all components of the stress and strain fields are *** this purpose,layer-wise theory is employed in a composite cylinder under internal pressure and low-velocity *** stress/strain components are fed into appropriate failure criteria for investigating the occurrence of *** case of experiencing any in-plane failure mode,the evolution of damage is modeled using progressive damage modeling in the context of continuum damage ***,mechanical properties of failed ply are degraded and stress analysis is performed on the updated status of the *** the event of delamination occurrence,the solution is *** obtained results are validated with available experimental observations in open *** is observed that the sequence of in-plane failure and delamination varies by increasing the impact energy.

关键词： composite pressure vessel low-velocity impact failure theoretical solution progressive damage modeling

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