Smart materials in BTeV? Antonio Paolozzi University of Rome ‘La Sapienza’ INFN Laboratori Nazionali Frascati.

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Presentation transcript:

Smart materials in BTeV? Antonio Paolozzi University of Rome ‘La Sapienza’ INFN Laboratori Nazionali Frascati

OBJECTIVE Testing embedding Fiber Bragg Gratings (FBGs) into a Carbon Fiber Reinforced Plastic Composite (CFRP) Manufacturing a smart material that could be used in some BTeV applications POSSIBLE APPLICATIONS SUPPORT STRUCTURES OF MICROSTRIP SUPPORT OF OTHER DETECTORS

LOW ATOMIC NUMBER AND HIGH MECHANICAL CHARACTERISTCS HIGH THERMAL STABILITY (VERY LOW THERMAL EXPANSION COEFFICIENT POSSIBILITY TO POSITION THE SENSORS IN ANY STRUCTURALLY SIGNIFICANT POINT IN THE STRUCTURE HIGHER RELIABILITY IN HANDLING SENSORIZED COMPONENTS WHY CFRP WITH EMBEDDED SENSORS?

MANUFACTURING PHASES

DIFFERENT SPECIMENS TO TEST SEVERAL EMBEDDING PROCEDURES AVOID FIBER DAMAGE OBTAIN OPTIMAL BONDING BETWEEN OPTICAL FIBER AND COMPOSITE STRUCTURE

Acrylate coated optical fiberUncoated optical fiber Micrographic analysis of embedded optical fiber

Micrographic analysis of optical fiber embedded with epoxy resin film Acrylate coated optical fiberUncoated optical fiber

Experimental test Structural bonding between CFRP structure and FBG sensor FBG resolution (axial deformation) evaluation

Enforced displacement at steps of 100  m Linearity: excellent FBG-CFRP structural bonding Resolution of axial deformation by FBG: better than 0.5  m

PLANNED TEST METALLIC BRACES HOLDING SUB-DETECTORS REPLACED BY CFRP SMART BRACES

CONCLUSIONS PERFECT BONDING BETWEEN FBGs AND CFRP WITH NO REDUCTION OF CFRP MECHANICAL CHARACTERISTICS