Micromechanics of pressure‐induced grain crushing in
10 01 1990 · The critical pressures for grain crushing in our sandstones range from 75 to 380 MPa In general a sandstone with higher porosity and larger grain size has a critical pressure which is lower than that of a sandstone with lower porosity and smaller grain size We formulate a Hertzian fracture model to analyze the micromechanics of grain crushing