Propagation of the hydraulic fractures was modeled by using a zero-thickness cohesive element, which can simulate the fracture propagation and fluid flow within the fractures in a completely coupled manner. With this 3D model, parametric studies were performed to illustrate the impact of perforation ...
The geometrically exact beam theory was proposed by Reissner (1972) and further developed by Simo and Vu-Quoc(1986) and Simo and Vu-Quoc(1988). The researches of later generations on geometrically exact beam mostly focus on the parametric method of rotation, the interpolation method of rotation...
However, since m and c can take on a value of ±∞, it is more convenient to write the equation of the line in parametric form as follows: &rgr;=x cos&thgr;+y sin&thgr; (2) where &thgr; is the angle made with the x-axis by the normal through the origin to the lin...
the orbital apex, and thus useful for measuring changes in remainder of the ON caused by eye rotation. The ON centroids, the ON junction with the globe, and the pseudo-orbital apex became knot points for the parameterization. Optic nerve path defined by parametric curve fitting to the knot ...