Study on Mechanical Performance of Composite Curved Beam

ZHU Dongmei, MA Tao, LIU Haiping, YANG Yang

Abstract

In this paper, a composite curved beam structure used in high stiffness components of space launch platform is designed，and its mechanical properties are studied experimentally and numerically. Firstly, the static loading test of the curved beam is carried out by a computer controlled electronic testing machine. The load-displacement characteristic curves of the curved beam are obtained, and the equivalent elastic modulus is calculated. Based on ABAQUS finite element software, the finite element model of curved beam is established, and the numerical computations under different displacement loads are carried out. The experimental data are used to verify the numerical results. The calculated results are in good agreement with the measured results, and the errors are less than 10%. Then, the finite element model is used to calculate the longitudinal and transverse displacements of curved beams under different loads. It is concluded that the longitudinal displacement of curved beam is small, the transverse displacement is large, and the ratio of transverse displacement to longitudinal displacement is greater than 10. The effects of thickness of curved beam, width of clearance, and length of central straight beam on the mechanical properties of curved beam are studied, and the rules of the influence of different geometric parameters on the equivalent elastic modulus are obtained. This study provides a reference for the application of curved beams in the vibration isolation devices.

 

 

Keywords:  curved beam,  elastic modulus,  finite element,  test,  load-displacement characteristics


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References


KURKIN E I, SADYKOVA V O. Application of short fiber reinforced composite materials multilevel model for design of ultralight aerospace structures [J]. Procedia Engineering, 2017, 185: 182—189.

TAN E L, UY B. Experimental study on curved composite beams subjected to combined flexure and torsion [J] . Journal of Constructional Steel Research, 2009, 65 (8): 1855—1863.

GUAN T F, YUAN H. Experimental study on bending properties of RC curved beams strengthened with CFRP [J]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2008, 47 (S2): 109—113.(In Chinese)

LI W, GUO Q F. Application of carbon fiber composites in cosmonautic fields [ J] . Chinese Optics, 2011, 4 (3): 201—212. (In Chinese)

YU A Q, LU Z. Application of carbon fiber composites in automobile industry [J]. Shanghai Automobile, 2013 (7): 48—52. (In Chinese)

RANZ D, CUARTERO J, MIRAVETE A, et al. Experimental research into interlaminar tensile strength of carbon/epoxy laminated curved beams [J]. Composite Structures, 2017, 164: 189—197.

MA L T, CHEN X W, WANG X, et al. Study on the post impact beam strength and failure mode of carbon/epoxy laminates[J]. Grp/Composite, 2017(3) : 17—20.(In Chinese)

LIU F S, JIN D P, WEN H. Optimal vibration control of curved beams using distributed parameter models [J]. Journal of Sound and Vibration, 2016, 384: 15—27.

GHUKU S, SAHA K N. A theoretical and experimental study on geometric nonlinearity of initially curved cantilever beams[J]. Engineering Science and Technology an International Journal,2016, 19 (1): 135—146.

HUANG X C, XU S Y, HUA H X, et al. Research on dynamic properties and vibration isolation performance of curved beam periodic structure. [J]Journal of Shanghai Jiao Tong University, 2013, 47 (2): 173—179. (In Chinese)

WU X, YANG L J. The elastic theory solution for curved beam with difference elastic modulus in tension and compression [J]. Engineering Mechanics, 2013, 30 (1): 76—80.(In Chinese)

POORTABIB A. Critical buckling load of curved sandwich beams with composite skins subjected to uniform pressure load [J]. Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2016, 38 (6): 1805—1816.


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