The distinct element method is a numerical model capable of describing the mechanical behaviour of assemblies of discs and spheres. The method is based on the use of an explicit numerical scheme in which the interaction of the particles is monitored contact by contact and the motion of the particles modelled particle by particle. The main features of the distinct element method are descri...... hiện toàn bộ
Dữ liệu mở rộng về độ bền và độ giãn nở của 17 loại cát trong môi trường biến dạng đối xứng hoặc phẳng tại các mức độ đậm đặc và áp suất giới hạn khác nhau đã được tổng hợp. Góc trạng thái tới hạn của kháng cắt của đất, khi đất chịu cắt ở thể tích hằng định, chủ yếu là hàm của khoáng vật học và có thể dễ dàng xác định bằng thực nghiệm trong phạm vi sai số khoảng 1°, thường là khoảng 33° đ...... hiện toàn bộ
#độ bền cát #độ giãn nở #trạng thái tới hạn #kháng cắt #khoáng vật học #ứng suất hiệu quả #chỉ số giãn nở tương đối
Eduardo Alonso Pérez de Ágreda, Antonio Gens, Alejandro Josa
The Paper presents a constitutive model for describing the stress-strain behaviour of partially saturated soils. The model is formulated within the framework of hardening plasticity using two independent sets of stress variables: the excess of total stress over air pressure and the suction. The model is able to represent, in a consistent and unified manner, many of the fundamental feature...... hiện toàn bộ
Synopsis Within the framework of limit equilibrium methods of stability analysis, no restriction need be placed at the outset upon the shape of the possible slip surface. In many cases, the critical surface may deviate significantly from a circle or a plane and therefore a method that facilitates the analysis of surfaces of arbitrary shape is of interest. A method for do...... hiện toàn bộ
A deformation measurement system based on particle image velocimetry (PIV) and close-range photogrammetry has been developed for use in geotechnical testing. In this paper, the theory underlying this system is described, and the performance is validated. Digital photography is used to capture images of planar soil deformation. Using PIV, the movement of a fine mesh of soil patches is meas...... hiện toàn bộ
Synopsis The aims, during the past 20 years, of the Cambridge research programme in soil mechanics are outlined. The principal objective is to develop an understanding of the stress–strain behaviour of soils so that reliable predictions can be made concerning their load-deformation characteristics at all working loads, rather than only loads at failure, in practical prob...... hiện toàn bộ
Synopsis Because of the significant influence of joints on important engineering properties of hard un-weathered rock, a description of such rock is inadequate for engineering purposes unless it includes reasonably complete and accurate information concerning the spacing and orientation of the joints. Such information can be obtained by means of a joint survey based on t...... hiện toàn bộ