TY - THES

T1 - Development of a Fatigue Testing System for CFRP Under Combined Cyclic and Impact Load

AU - Bärnthaler, Christian

N1 - embargoed until null

PY - 2015

Y1 - 2015

N2 - The working speed of stamping machines or similar devices is often not high enough. To increase the working speed of high speed stamping machines, it is necessary to reduce the masses of the moving parts. Due to their high stiffness and strength, carbon fibre reinforced composites seem to be ideal for this application. Typically the components are used for 20 000 h of operation. To validate the material’s fatigue strength for up to 1.5e9 cycles, a suitable testing facility is designed. Various problems like a high testing frequency, heating of the specimen and an accurate measuring system have to be considered. In the end a high frequency testing machine is designed. The functionality of the testing device is examined and reported.

AB - The working speed of stamping machines or similar devices is often not high enough. To increase the working speed of high speed stamping machines, it is necessary to reduce the masses of the moving parts. Due to their high stiffness and strength, carbon fibre reinforced composites seem to be ideal for this application. Typically the components are used for 20 000 h of operation. To validate the material’s fatigue strength for up to 1.5e9 cycles, a suitable testing facility is designed. Various problems like a high testing frequency, heating of the specimen and an accurate measuring system have to be considered. In the end a high frequency testing machine is designed. The functionality of the testing device is examined and reported.

KW - CFRP

KW - VHCF

KW - high speed stamping machines

KW - resonant resting

KW - high frequency testing

KW - fatigue strength CFRP

KW - CFK Ermüdung

KW - VHCF

KW - Stanzpressen

KW - Resonanzprüfstand

KW - Hochfrequenter Prüfstand

KW - Dauerfestigkeit CFK

M3 - Master's Thesis

ER -