ACUM 2016

Long-term reliability: Munich 1970

2 ETH Zürich - Dr. A. Winistörfer,

Materialwissenschaft, 327-0610-00L Verbundwerkstoffe

Summer Olympics 1972

Carbon loops

Marenco Rotorblades

America’s Cup 2010 – Alinghi 5

2500 t cable with ball termination

Contact

Frictional contact Model stick-slip transition

P: normal pressure COHE: Cohesive limit (default=0) TAUMAX: Maximal friction stress (default =1e20) m: friction coefficient

Results along this path

STRESS COMPONENTS

S11 along the path

S22

S33

Shear

Failure criteria (Max Stress vs Puck)

Puck Fiber Criterium vs Friction Coefficient

Puck Matrix Criterium vs Friction Coefficient

MAXIMAL FRICTIONAL STRESS (TAUMAX)

Max Stress Criterium vs Max Friction Stress

Puck Matrix Criterium vs Max Friction Stress

Conclusions

• The modelling of Complex Composite components consisting of adhesively bonded parts and inserts results in many cases in non-conservative solutions.

• Considering realistic frictional interface properties is costly but often important to determine the safety of the structure

• Software has improved dramatically over the years