Résumé : In today's research, damage analysis is the burning issue. A lot of papers are dedicated to this subject. In the present study we will compare two different methods to visualize damage and damage growth in composite materials. The first method is ultrasonic inspection which is a well established method to detect damage. The second uses the change of temperature as an indicator for damage development and damage accumulation. Results are given for both methods in a qualitative colour map. © 1989, Walter de Gruyter. All rights reserved.