No abstract

No abstract

No abstract

No abstract

Adhesion evaluation method of laminated material using scattering parameter fbr ultrasonic waves was proposed ． Glass blocks were Iaminated and reflection coethcient ( ∫ll ) fbr the ultrasonic waves ofswept 丘equency was measured ． As a results ， when diameter of the adhesive area was more than 8 mm ， ultrasonic waves Gould be transmiUed into 血 e second glass block ， Therefbre ， a possibility of adhesive evaluation of laminated material using our method was demonstrated ．