Experimental Mechanics

, Volume 25, Issue 2, pp 140–144 | Cite as

Thermal nonlinear behavior of sandwich panels: Experimental measurements

  • R. Hussein
  • P. Fazio
Article

Abstract

Elasticity solutions for sandwich panels assembled with nonrigid bondings and subjected to temperature changes are presented. The solutions satisfy the equilibrium equations of the face and core element, and the compability equations of stresses and strains at the interfaces. An experimental program is conducted to measure the normal strains in the faces of sandwich specimens under different temperature changes. A heat chamber is designed and used to cause thermal gradients across the specimens. The material properties were determined experimentally and used in conjunction with the analytical solutions. Both analytical and experimental results are found to be in very good agreement.

Keywords

Mechanical Engineer Material Property Temperature Change Fluid Dynamics Experimental Measurement 

List of Symbols

a

half span of sandwich panel

c

core

C1m,C2m

constants

E

elastic modulus

f

facings

G

shear modulus of core material

k

bonding stiffness

m

odd integer

T

temperature change at the panel faces

tc

half core thickness

tf

face thickness

x,z

coordinate axes

Xom

constant

σx, σz

normal stresses in the core of a sandwich panel

σf

normal stress in the faces of a sandwich panel

τ

transverse shear stress

α

coefficient of thermal expansion

αm

constant defined bymπ/2a

θm

constant

μ

constant defined by (Ex/G)1/2

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References

  1. 1.
    Chong, K.P., Engen, K.O. and Hartsock, J.A., “Thermal Stress in Determinate and Indeterminate Sandwich Panels with Formed Facings,” presented at ASCE 1st Eng. Mech. Div. Specialty Conf., Waterloo, Canada (May 1976).Google Scholar
  2. 2.
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  3. 3.
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  4. 4.
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  5. 5.
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  6. 6.
    Marsh, C. and Nakhla, M., “Thermal Stresses in Metal-Faced Sandwich Panels,” Proc. 6th Canadian Cong. Appl. Mech., Vancouver (May 29-June 3, 1977).Google Scholar
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    Marsh, C. and Nakhla, M., “Thermal Stresses in Framed Aluminum Sandwich Panels,” ASCE Fall Conv. and Exhibit, San Francisco, CA (Oct. 17–21, 1977).Google Scholar

Copyright information

© Society for Experimental Mechanics, Inc. 1985

Authors and Affiliations

  • R. Hussein
    • 1
  • P. Fazio
    • 2
  1. 1.Civil Engineering DepartmentNew Jersey Institute of TechnologyNewarkUSA
  2. 2.Center for Building StudiesConcordia UniversitvMontrealCanada

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