Influence of assembly gap on fatigue performance of composite components under bending load

doi:10.19936/j.cnki.2096-8000.20210928.016

Abstract

Abstract: Geometrical deformation of composite component is usually unavoidable due to the anisotropic properties of carbon fiber reinforced plastics (CFRP) after curing, which introduces gaps at the matching surfaces during assembly. Mechanical performance of the composite structure is consequently affected. To investigate the influence of assembly gap on fatigue performance of composite structures under bending load, experiments are designed and conducted, which involves the usage of electronic universal testing machine and hydraulic fatigue machine as well. It was found that the assembly gap has great influence on failure process of composite structure under bending load condition and decreases their fatigue life as a result. Moreover, when the height of assembly gap falls into certain span, the fatigue life increases with the increasing of gap length. Compared to the length of assembly gap, the height of assembly gap has greater effects on fatigue life of composite structure.

Key words: CFRP, assembly gap, three-point bending, fatigue

CLC Number:

TB332

GE En-de, SHANG Yan-wei, LIU Xue-shu, LI Ru-peng. Influence of assembly gap on fatigue performance of composite components under bending load[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(9): 99-106.

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