Fig. 5
From: A three-phase contact-breakage model for brittle spherical particles with conical nucleus formation

The predicted curve for Fn and s throughout the entire crushing process for spheres composed of limestone, marble, sandstone and gypsum, with diameter 50Â mm. The mechanical parameters of these materials are derived from Zhou38. The circles are the boundary point between the local compaction phase and the elastic deformation phase, while the triangles indicate the occurrence of integral crushing. The dotted lines represent post-peak curves of each material that are impossible to predict theoretically.