Mechanical measurements are needed in a large variety of activities at CERN. The Mechanical Measurement Lab of EN/MME group is equipped to perform a very large range of mechanical tests at ambient as well as cryogenic temperatures and in magnetic fields. In particular for the R&D program of new magnets, force transducers based on strain and capacitive gauges are developed and used at CERN. In 2010, the generation of new data acquisition systems allows to measure simultaneously the strain gauges, the capacitive gauges and other external parameters (current, temperature, etc…). Mechanical measurements at CERN include also other fields of interest such as mechanical failure analysis, FEA validation, and vibration characterisation. Ground motion measurements are carried out for the CLIC stabilisation activities.
This seminar will give an overview of the mechanical measurement techniques used by EN-MME lab. Furthermore the seminar will focus on the experimental performances of the new system developed to measure simultaneously the strain and capacitive gauges. The dynamic stress measurements will also be discussed with an example of failure analysis.
Michael Guinchard graduated DUT Mesures Physiques in 1996 from the Strasbourg University of Technology. He worked for General Motors in the Noise and Vibration Laboratory of the European Technical Centre during 6 years and followed in parallel courses in instrumentation – measurements with the CNAM (Conservatoire National des Arts et Métiers). He is in charge of the Mechanical Measurements Lab since 2005.