On the Formation of Regular Crack Networks around a Circular Hole under Uniform Compression
The energy approach is used to propose a model of arising of regular systems of cracks,emerging the surface of a circular cavity,being observed,for example,around oil and gas wells under uniform compression.The cracks are supposed to arise due to the accumulation of elastic compression energy in the system.The limit compression (the exhaustion of strength) being achieved,a network of cracks is formed in the most stressed layer adjacent to the interior of the body,thus utilizing the accumulated elastic energy of this layer.In this case,of all the possible grids the least energy-consuming one is formed,that is,the system with such a number n and length L of the cracks,that the energy needed for its creation is minimal.In the simplest scheme the number n of petals-wedges arising from the cracking turns out to be equal to 5 (which corresponds to 2n = 10 cracks) and (contrary to limit compression pressure magnitude) be independent on geometrical and physical-mechanical parameters of the problem.
Crack Systems Oil and Gas Wells
Ilya Nickolaevich Dashevskiy
A.Ishlinsky Institute for Problems in Mechanics,Russian Academy of Sciences,119526,Russia
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）