COMPLEX VARIABLE-VARIATIONALMETHOD OF SOLUTION FOR BI-METALLAMINATES WITH INTERFACE CRACKSAND ITS APPLICATION IN GLUED JOINTS

In this paper, the eigen function expansions of displacements and stresses of bi-metal laminates with interface cracks are obtained. Furthermore, the stress intensity factors are determined by the variational method to satisfy the boundary conditions and there are only line integrals in the variational equations due to the previous satisfaction of all basic equations. The computations show that this method of solution has the advantages of rapid convergency and time-saving. The results obtained by this method for homogeneous material agree with the known ones very well.

利用测井方法评价裂缝分布规律

鄂尔多斯盆地东部奥陶系风化壳海相碳酸盐岩,在漫长的地史时期,受地应力作用,发生了一系列构造断裂现象,形成了有利于天然气运聚的储渗条件。这类储渗条件,以断裂及裂缝为先导,以风化壳岩溶孔洞为储集体,构成了孔、洞、缝网络系统。根据岩芯观察,该网络系统的裂缝,类型多样、产状各异。在储层中起到了沟通孔洞、改善储集性能和提高产能的作用。