Vol.2, No 7, 1997 pp. 259 - 267
UDC 539.3:534.1
PLANE THERMOELASTIC WAVES IN INFINITE
HALF-SPACE CAUSED BY INSTANTANEOUS PRESSURE FORCES ON ITS SURFACE
1Rastko
Čukić, 2Dejan
Trajkovski
1Faculty
of Mechanical Engineering, University of Belgrade, 27 Marta 80, 11000 Belgrade,
Yugoslavia,
2Faculty
of Technical Engineering, University St. Kliment Ohridski, Ivo Ribar Lola
bb, 97000 Bitola, Macedonia
Abstract. The propagation of longitudinal thermoelastic waves in
a half-space caused by mechanical influences is considered. One-dimensional
dynamic problem of coupled thermoelasticity is solved by using integral
transforms. Exact and approximate expressions for calculation of thermomechanical
values at each point of a half-space and at arbitrary moment of time are
given. Qualitative and quantitative analyses of the effects of damping
and dispersion of thermoelastic waves is performed.
RAVNI TERMOELASTIČNI
TALASI U POLUPROSTORU IZAZVANI PRITISNIM SILAMA U NJEGOVOJ RAVNI
Razmatran je problem prostiranja longitudinalnih
talasa u poluprostoru izazvanih mehaničkim uticajima. Jednodimenzioni dinamički
problem spregnute termoelastičnosti rešavan je korišćenjem integralnih
transformacija. Dati su tačni i približni izrazi za izračunavanje termomehaničkih
veličina za svaku tačku poluprostora u proizvoljnom trenutku vremena. Izvršena
je kvalitativna i kvantitativna analiza efekta prigušenja i rasipanja termoelastičnih
talasa.
