6533b7d7fe1ef96bd1269073
RESEARCH PRODUCT
Effect of the loading rate on ultimate strength of composites. Application: Pressure vessel slow burst test
Alain ThionnetAlain ThionnetAnthony R. BunsellGeorg W. MairH.y. Chousubject
Materials scienceSpeed effectPressure vessels[ SPI.MAT ] Engineering Sciences [physics]/MaterialsComposite numberMicromechanicsFibre break02 engineering and technology021001 nanoscience & nanotechnologyPressure vesselViscoelasticity[SPI.MAT]Engineering Sciences [physics]/MaterialsStress (mechanics)Matrix (mathematics)Mathematics::Algebraic Geometry020303 mechanical engineering & transports0203 mechanical engineeringUltimate tensile strengthCeramics and CompositesLoading rateMicromechanicsComposite material0210 nano-technologyCivil and Structural Engineeringdescription
International audience; The strength of unidirectional elastic fibre composites is shown to depend on the loading rate as the viscoelastic nature of the matrix results in a fall in breaking load as the rate is reduced. The simulation of the accumulation of fibre breaks leading to failure, takes into account all physical phenomena involved fibre failure, including the stochastic nature of fibre strength, stress transfer through the matrix between reinforcements, interfacial debonding and the viscoelastic nature of the matrix. The kinetics of composite failure are seen to involve the initial formation of random fibre breaks which at higher loads coalesce into clusters of broken fibres. The rate at which this occurs depends on the viscoelastic properties of the matrix. These results have been shown to closely mirror the behaviour of carbon fibre composite pressure vessels.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-10-01 | Composite Structures |