کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1475552 | 1510143 | 2013 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Direct numerical simulations on crack formation in ceramic materials under thermal shock by using a non-local fracture model Direct numerical simulations on crack formation in ceramic materials under thermal shock by using a non-local fracture model](/preview/png/1475552.png)
In this work, a non-local failure model was proposed and implemented into a finite element code. It was then used to simulate the crack evolution in ceramic materials subjected to thermal shock. By using this numerical model, the initiation and propagation of cracks in water quenched ceramic specimens were simulated. The numerical simulations reproduced faithfully the crack patterns in ceramic specimens underwent quenching tests. The periodical and hierarchical characteristics of the crack patterns were accurately predicted. The numerical simulations allow a direct observation on whole the process of crack initiation and growth, which is quite a difficult task in experimental studies. The failure mechanisms and the fracture procedure are discussed according to the numerical results obtained from the simulations. It is shown that the numerical model is simple, robust, accurate and efficient in simulating crack evolution in real structures under thermal shock.
Journal: Journal of the European Ceramic Society - Volume 33, Issues 13–14, November 2013, Pages 2677–2687