围压与轴压共同作用对恐龙化石应力场的影响

包括恐龙化石在内的古生物化石是重要的地质遗迹,是研究生物进化的最重要资料。该文从物理力学角度,通过数值试验模拟分析围压和轴压作用下对恐龙化石强度和破坏特性的影响效果。试验结果表明:不同埋深时围压对含有不同角度裂隙化石应力影响较大,随着埋深增加,含有裂隙化石的应力大幅增大。在围压与轴压共同作用时,埋深对开裂角的影响较小,而随埋深增大时极限载荷也随之增大。同时,在不同埋深下开裂角随裂隙角度的变化趋势一致,均随着裂隙角度的增大而减小;而极限载荷随裂隙角度的变化趋势一致。

Effect of Confining Pressure and Axial Pressure on Stress Field of Dinosaur Fossils

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.