Analysis of Carbon Fiber Hydraulic Cylinder under Combined Internal Pressure and Thermomechanical Load

doi:10.3901/JME.2025.08.308

Abstract

Abstract: Carbon fiber reinforced plastic(CFRP) hydraulic cylinders are used to replace metal cylinders in hydraulic system to reduce energy consumption and improve loading capacity in mobile equipment. The composites have anisotropy of the stress characteristics and the coefficient of thermal expansion, which causes the difference of stress and strain between adjacent different layers. A temperature distribution model and a thermal-mechanical model have been established. The stress and strain in the CFRP hydraulic cylinders under combined internal pressure and thermomechanical load are obtained using the model. The Tsai-Hill and Tsai-Wu failure criterion are used to evaluated the safety of the CFRP cylinder. The stress and strain of a CFRP hydraulic cylinder, have been analyzed using the temperature distribution model and the thermal-mechanical model. The result shows the safety factor is improved by the thermal stress in the cross section. And the inner diameter deformation of the hydraulic cylinder is reduced by the thermal load, and the deformation is within the sealing requirements. The thermal-mechanical analysis of the CFRP hydraulic cylinder can be used to guide the design of the CFRP hydraulic cylinder.

Key words: hydraulic cylinder, carbon fiber, thermal-mechanical coupling, anisotropy, temperature distribution, thermal stress

CLC Number:

TB332

YU Tian, LIU Zhicheng, LI Yao, WAN Xiaofei, JIAO Zongxia, SHANG Yaoxing. Analysis of Carbon Fiber Hydraulic Cylinder under Combined Internal Pressure and Thermomechanical Load[J]. Journal of Mechanical Engineering, 2025, 61(8): 308-318.

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