Experimental Mechanics

, Volume 37, Issue 1, pp 21–25 | Cite as

Thermal expansion measurement of composites with optical heterodyne interferometry

  • F. De Bona
  • A. Somá


A dilatometer based on an optical heterodyne laser interferometer for high-precision measurements of thermal expansion coefficient (α) has been developed. The instrument is mainly intended for measuring low-expansion composites at room temperature. Compared with already existing instruments, the proposed system is characterized by a higher thermal expansion resolution (30 nm/m). In the case of low-expansion composites, intervals of uncertainty of α lower than 0.1 μm/mK have been obtained.


Mechanical Engineer Thermal Expansion Fluid Dynamics Expansion Coefficient Thermal Expansion Coefficient 
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  1. 1.
    Stumm, J.E., Pynchon, G.E. andKrumweide, G.C., “Graphite/epoxy Material Characteristics and Design Techniques for Airborne Instrument Application,”Proc. SPIE,309 188–198 (1981).Google Scholar
  2. 2.
    Yoder, P.R., Opto-mechanical Systems Design, Marcel Dekker, New York, 427–437 (1986).Google Scholar
  3. 3.
    Halpin, J.C. and Pagano, J.J., “Consequences of Environmentally Induced Dilatation in Solids,” AFML-TR-68-395 (1969).Google Scholar
  4. 4.
    De Bona, F., Gambitta, A. and Somá, A., “Evaluation of the Thermal Expansion Coefficient versus Fiber Orientation of Composite Laminate,” Proc. Experimental Techniques and Design in Composite Materials, Cagliari, 247–257 (1992).Google Scholar
  5. 5.
    De Bona, F., Gambitta, A. andSomá, A., “Progettazione di Elementi Strutturali in Composito a Basso Coefficiente di Espansione Termica,”Teoria ed Esperimento nella Progettazione, 11 Ponte Vecchio Ed., Forlí, 239–246 (1993).Google Scholar
  6. 6.
    McCarthy, D.J. and Facey, T.A., “Design and Fabrication of the NASA 2.4-meter Space Telescope,” Proc. SPIE,330,Optical Systems Engineering II (1982).Google Scholar
  7. 7.
    Krim, M.H., “Design of Highly Stable Optical Support Structure,”Optical Engineering,14 (6),552–558 (1975).Google Scholar
  8. 8.
    Tompkins, S.S., Bowels, D.E. andKennedy, W., “Laser Interferometric Dilatometer for Thermal Expansion Measurements of Composites,” EXPERIMENTAL MECHANICS,26, (1),1–6 (1986).Google Scholar
  9. 9.
    American Society for Testing and Materials, “Linear Thermal Expansion of Rigid Solids with Interferometry,”E289-70, Annual Book of ASTM Standards, Philadelphia, PA 3.01,405–410 (1990).Google Scholar
  10. 10.
    Rogers, K.F., Phillips, L.N., Kingston-Lee, D.M., Yates, B., Overy, M.J., Sargent, J.P. andMcCalla, B.A., “The Thermal Expansion of Carbon Fiber-reinforced Plastics,”J. Mat Science,12,718–734 (1977).Google Scholar
  11. 11.
    Bowels, D.E., Post, D., Herakovich, C.T. andTenney, D.R., “Moiré Interferometry for Thermal Expansion of Composites,” EEXPERIMENTAL MECHANICS,21 (2),441–448 (1981).Google Scholar
  12. 12.
    Slocum, A., Precision Machine Design, Prentice Hall Englewood Cliffs, NJ (1991).Google Scholar
  13. 13.
    De Bona F. andZelenika, S., “Characterization of High Precision Parallel Spring Translators,”Int. Progress in Precision Engineering, Butterworth-Heinemann, Boston, 761–772 (1993).Google Scholar
  14. 14.
    Steinmetz, C.R., “Sub-micron Position Measurement and Control on Precision Machine Tools with Laser Interfermetry,”Precision Engineering 12 (1),12–24 (1990).CrossRefMathSciNetGoogle Scholar
  15. 15.
    American Society for Testing and Materials, “Linear Thermal Expansion of Solid Materials with Vitreous Silica Dilatometer,”E228-85, Annual Book of ASTM Standards, Philadelphia, PA 3.01,378–382 (1990).Google Scholar
  16. 16.
    Pirgon, O., Wastenholm, G.H. andYates, B., “Thermal Expansion at Elevated Temperatures IV. Carbon Fiber Composites,”J. Physics D: Appl. Phys.,6,309–321 (1973).Google Scholar

Copyright information

© Society for Experimental Mechanics, Inc. 1997

Authors and Affiliations

  • F. De Bona
    • 1
  • A. Somá
    • 2
  1. 1.Dipartimento di Ingegneria Elettrica Gestionale e MeccanicaUniversitá di UdineUdineItaly
  2. 2.Dipartimento di MeccanicaPolitecnico di TorinoTorinoItaly

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