Abstract
Adhesively joined materials or structures have been widely used in variousengineering practices. In the process of manufacturing, fabrication orapplication, cracks are invariably produced. Many times, cracks areoriented arbitrarily to the bimaterial interface. Up to now, a thoroughtheoretical investigation of the problem is still not available.In this dissertation, the complex function method and the digitalphotoelastic technique will be employed to analyze, both theoretically andexperimentally, the state of stress when cracks oriented arbitrarily toand terminated at the bimaterial interface. The variation of stressintensity factors with different combinations of the materials anddifferent inclination angles of the crack were investigated.By using the statistical analysis procedure, general correlation equationswere found between stress intensity factors and crack inclination anglesas well as material combinations.黏接材料或結構已被廣泛地應用於各類工程實務中，例如複合材料、陶瓷材料、火箭推進劑、積體電路晶片、壓力容器之加層及焊接成品等，然而由於製造成使用過程中，裂縫不可避免將出現於構件中，往往會造成此等材料或結構之壽命及安全性的降低，甚而有破裂現象的產生，故如何有效及適切地使用及設計黏接材料或結構，當屬目前重要之課題。由於材料之非均勻性和裂縫相對於材料界面有不同幾何方位的關係，使得此類問題之分析工作較單一材料之破裂問題來得複雜。本文採用複變函數理論，推導出當一半無窮裂縫以任意角度相交且終止於雙重材料界面時之應力奇異性及應力分佈式，並配合數位光彈法（即結合傳統光彈法與近代影像處理技術之方法）予以從事實驗分析。