Displacements and stress distribution in D0 Run IIb stave due to CTE mismatches

Lanfranco, Giobatta ; Fast, James ; /Fermilab

Fermi National Accelerator Laboratory

关键词: Stresses;    Experiment-Hep, Instrumentation;    Design;    Strains;    Thermal Expansion Experiment-Hep, Instrumentation;   

DOI  :  10.2172/15017254
RP-ID  :  FERMILAB-TM-2296-E
RP-ID  :  AC02-76CH03000
RP-ID  :  15017254

美国|英语

来源: UNT Digital Library

【 摘 要 】

A possible D0 Run IIb stave design currently under study is characterized by an outer carbon fiber stiffening shell with the silicon detectors mounted internally and a single central cooling line running between them; in this paper the stave will be analyzed for thermal compatibility since the different coefficient of thermal expansion in the materials may cause unpredictable stresses and strains in the structure. A simplified stave section has been modeled with finite elements for different materials configurations and the vertical and longitudinal displacements induced by the thermal gradient, together with the related stresses, have been computed. Finally, once selected the most suitable material combination, a more realistic model has been created in order to study the influence of the hybrid location along the ladders.