Probabilistic Aspects of Diagnostics and Prognostics of Metal and Composite Structures Under Repeated Loading
发布时间: 2012-08-22 09:02:00
报告题目：Probabilistic Aspects of Diagnostics and Prognostics of Metal and Composite Structures Under Repeated Loading
报告人：Prof. Jan D. Achenbach
主持人：方岱宁 教授
内容摘要： The 23rd International Congress on Theoretical and Applied Mechanics held in Beijing will be finished by the time of this lecture. It will be of interest to briefly take stock of the progress that has been achieved over the last 50 years, and to comment on the future of the field. It is evident that the emphasis of research in T&AM is currently directed towards problems of interdisciplinary interest. One such area is quantitative non-destructive evaluation (QNDE) and the related field of structural health monitoring (SHM).
I will discuss the use of waves of ultrasound that can enter opaque materials and “see” defects. These ultrasonic techniques, as well as other methods, are the basis for diagnostic methods in QNDE and SHM. In this presentation I will devote particular attention to probabilistic aspects of diagnostics and prognostics. An example is given for detection and growth of fatigue cracks emanating from rivet holes in a lap joint. An analogous probabilistic approach will be presented for the formation of delaminations in laminated fiber-epoxy composites under repeated impact loading.