Application of the laser-beam technique in thermal-shock testing
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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.
KeywordsMechanical Engineer Fluid Dynamics Theoretical Analysis Heat Source Experimental Observation
radius of a solid disk, in.
specific heat of disk material, Btu/lb-°F
modulus of elasticity, psi
thermal diffusivity of disk material, in.2/sec
thickness of a solid disk, in.
radial distance in cylindrical polar coordinate system, in.
total energy released from source, Btu.
the strength of source, °F-in.2
temperature rise in the disk after thermal shock, °F
time after thermal shock, sec
radial displacement of a solid disk, in.
coefficient of linear thermal expansion, °F−1
roots of a characteristic equation
- \( \in _n \)
constant =1 forn=0=2 forn≥1
density of disk material, lb/in.3
shear modulus of elasticity, psi
angular distance in cylindrical coordinate
Bessel function of ordern
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