Thank so much Ms Aria Tsam and Mr. Tom Schanz. I read many paper and book of him. However, this only application tij concept to some problem and didn't explain clearly how to apply this concept to FEM. I applied tij concept for Drucker-prager as attached file below. In this case how to apply to FEM. If you can, please help me. Thank you so much for you support.
Chao Bạn, mình là Hùng đang học PhD ở Saidai, đang tìm bài báo:
Tatsuoka, F., Sakamoto, M., Kawamura, T. and Fukushima, S. (1986), “Strength and deformation characteristics of sand in plane strain compression at extremely low pressures”, Soils and Foundations, Vol. 26, No. 1, pp. 65– 84.
Nếu bạn có, có thể gửi cho mình xin theo địa chỉ này được không?