Abstract:Paleontological fossils including dinosaur fossils are not only important geological remains, but also the most important data on studying biological evolution. In this paper, from the aspect of physical mechanics, through numerical experiments, the effects of confining pressure and axial pressure on the strength and failure characteristics of dinosaur fossils have been analyzed. It is showed that the confining pressure has a great influence on the stress of the fractured fossils with different angles at different burial depths, and the stress of the fractured fossils increases greatly with the increase of burial depth. When confining pressure and axial pressure act together, the influence of burial depth on cracking angle is small, and the limit load increases with the increase of burial depth. At the same time, the crack angle at different depth has the same trend with the crack angle, and decreases with the increase of the crack angle. The ultimate load varies with the crack angle.
