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Experimental Mechanics

, Volume 9, Issue 11, pp 507–512 | Cite as

Application of the laser-beam technique in thermal-shock testing

Paper describes thermal-shock tests using an instantaneous point heat source on circular disks by means of the laser-beam technique
  • D. R. Axelrad
  • T. R. Hsu
Article

Abstract

The present work is concerned with the application of the laser-beam technique for the thermal-shock testing of metal disks. For the generation of an instantaneous heat source, a solid-state laser is employed. The theoretical analysis of the thermal-shock problem is presented elsewhere. The present work deals with the results obtained from experimental observations and a comparison with the theoretically predicted results is made.

Keywords

Mechanical Engineer Fluid Dynamics Theoretical Analysis Heat Source Experimental Observation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Nomenclature

a

radius of a solid disk, in.

c

specific heat of disk material, Btu/lb-°F

E

modulus of elasticity, psi

K

thermal diffusivity of disk material, in.2/sec

l

thickness of a solid disk, in.

m

integer numbers

n

integer numbers

r

radial distance in cylindrical polar coordinate system, in.

Q

total energy released from source, Btu.

S

the strength of source, °F-in.2

T

temperature rise in the disk after thermal shock, °F

t

time after thermal shock, sec

Ur

radial displacement of a solid disk, in.

α

absorption coefficient

αt

coefficient of linear thermal expansion, °F−1

βn,m

roots of a characteristic equation

\( \in _n \)

constant =1 forn=0=2 forn≥1

ρ

density of disk material, lb/in.3

μ

shear modulus of elasticity, psi

ν

Poisson's ratio

θ

angular distance in cylindrical coordinate

Jn(z)

Bessel function of ordern

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References

  1. 1.
    Hsu, T. R., “Thermal Shock on a Finite Disc due to an Instantaneous Point Heat Source,”PhD thesis, Chapts. 2 and 3, McGill University, Montreal, Canada (1968).Google Scholar
  2. 2.
    Osial, T. A., “The Laser as a Machining and Welding Tool,” Laser Focus (July, 1965).Google Scholar
  3. 3.
    Axelrad, D. R., “Application of the Laser Beam Technique In Mechanical Testing of High Temperature Material,” Proc. 5th Intl. Conf. on Nondestructive Testings, Montreal, Canada (May 1967).Google Scholar
  4. 4.
    Ready, J. F., “Effect due to Absorption of Laser Radiation,”Jnl. Appl. Phys.,36 (2),462–468 (1965).CrossRefGoogle Scholar
  5. 5.
    Verber, C. M., andAdelman, A. H., “Laser-Induced Thermionic Emission from Tantalum,”Jnl. Appl. Phys.,36 (5),1522–1525 (1965).CrossRefGoogle Scholar

Copyright information

© Society for Experimental Mechanics, Inc. 1969

Authors and Affiliations

  • D. R. Axelrad
    • 1
  • T. R. Hsu
    • 2
  1. 1.Micromechanics of Solids Lab., Department of Mechanical EngineeringMcGill UniversityMontrealCan.
  2. 2.Whiteshell Nuclear Research EstablishmentAtomic Energy of Canada Ltd.PinawaCan.

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