Benefits of crimped and prestressed CFRP’s over noncrimped fibres as reinforcement in machine elements

Kanellopoulos, Ioannis; Vasileiou, Ioannis; Kitsos, Ioannis

doi:10.1063/1.4897829

Cited by 1 publication

(1 citation statement)

References 13 publications

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“…Due to an optimal placement topology the carbon fibre reinforcement is fully exploitable at the tensile critical root section of the gear, where it undertakes all the tensile stress and suppresses the formation of root cracks, either static or fatigue in nature. As a result, the load carrying capacity of the gear is greatly improved and an important prerequisite of the winding method is that the carbon fibre reinforcement is always straightened and pre-tensioned lightly (Kanellopoulos et al, 2014), which improves rigidity. As the waviness of the fibres is absent, the composite material acquires improved mechanical characteristics in general.…”

Section: Introductionmentioning

confidence: 99%

Improving strength for automotive plastic gears through directional fibre reinforcement

Spitas

2019

IJPT

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In this paper, a new topology of reinforcing plastic gears with carbon fibres is introduced. The reinforcement is placed tangentially to the critical cross section at the tooth fillet to improve bending strength. The mechanical modelling of the fibrous reinforcement is performed using an anisotropic material stiffness matrix derived from the analysis of a representative volume element using commercial stress analysis software. Benchmarking against conventional plastic gears illustrates that the maximum fillet stress, which is responsible for tooth failure in overloading conditions is greatly reduced, therefore rendering these gears suitable for considering their use in high load applications such as in the automotive industry. Also, the effect of the thickness of the reinforcement on the maximum developed tensile stress at the root is examined. The results show significant decrease of the bending stress at the root fillet rendering this design an alternative way in reinforcing plastic gears.

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Section: Introductionmentioning

confidence: 99%

Improving strength for automotive plastic gears through directional fibre reinforcement

Spitas

2019

IJPT

View full text Add to dashboard Cite

show abstract

Benefits of crimped and prestressed CFRP’s over noncrimped fibres as reinforcement in machine elements

Cited by 1 publication

References 13 publications

Improving strength for automotive plastic gears through directional fibre reinforcement

Improving strength for automotive plastic gears through directional fibre reinforcement

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