Fügen Und Verbinden

Kalweit, Andreas; Paul, Christof; Peters, Sascha; Wallbaum, Reiner

doi:10.1007/978-3-642-02642-3_13

Cited by 1 publication

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Both methods reduce the amount of preload loss, when the screw strain is lowering due to creep of the clamped material. Another possibility is to transfer the preload force of the screw not into the creeping material, but into an adapter sleeve made out of steel [34].…”

Section: Simulation Proceduresmentioning

confidence: 99%

Creep-Induced Screw Preload Loss of Carbon-Fiber Sheet Molding Compound at Elevated Temperature

et al. 2019

View full text Add to dashboard Cite

The application of chopped-fiber reinforced polymers in screwed connections at high temperatures raises the question of creep under long-term loading. While up to now thermoplastic materials have mainly been the focus of attention when it comes to creep, this paper shows that thermoset carbon-fiber SMCs (sheet mold compounds) can also be affected by this phenomenon. Screwed connections were investigated regarding their loss of preload force at 120 °C ambient temperature. Additionally, strain–time diagrams were recorded at different stress levels at 120 °C in a creep test setup of a universal testing machine by using optical strain tracking of SMC coupons. The transverse modulus under compression in thickness direction was determined in the same test setup. For data application within a FEA (finite element analysis) software power law curves according to Norton–Bailey creep law were fitted in the strain–time graphs. The applicability of the obtained creep law was crosschecked with a test carried out on the loss of preload force of a screwed connection. The developed simulative methodology offers the possibility to simulate various mounting situations of the bolted connection and to investigate measures against the loss of preload force easily. A promising possibility to limit the loss of preload force due to creep was simulatively evaluated.

show abstract

Section: Simulation Proceduresmentioning

confidence: 99%