Pingao Yu

Yu, P. G., & Havner, K. S. (2000). Numerical studies of nonuniform deformation, stress state evolution, and subgrain formation in bicrystals in (110) channel die compression. Journal of the Mechanics and Physics of Solids, 49(1), 173–208. https://doi.org/10.1016/s0022-5096(00)00021-1

Havner, K. S., & Yu, P.-G. (1998). On the stress state at the yield point in symmetric bicrystals in (110) channel die compression. Mechanics of Materials, 27(4), 211–227. https://doi.org/10.1016/S0167-6636(97)00049-5