http://bura.brunel.ac.uk/handle/2438/148 2013-02-20T13:09:05Z 2013-02-20T13:09:05Z Mikhailov, SE Namestnikova, IV http://bura.brunel.ac.uk/handle/2438/7248 2013-02-18T15:22:42Z 2003-01-01T00:00:00Z

Title: Local and non-local approaches to fatigue crack initiation and propogation Authors: Mikhailov, SE; Namestnikova, IV Abstract: A functional form of local strength conditions under fatigue loading is introduced and employed to formulation and analysis of fatigue crack initiation and propagation. For the strength conditions associated with the Palmgren-Miner linear damage accumulation rule and the power-type S-N diagram, the problem is reduced to a non-linear integral Volterra equation, which can be transformed to a linear one for the case of a single crack. An analytical solution of some simple problems are presented for the latter case and shortcomings of the local approach are pointed out. A non-local approach free from the shortcomings is presented along with an example of its implementation. Description: Copyright @ 2003 Kulwer Academic Publishers.

2003-01-01T00:00:00Z Mikhailov, SE Namestnikova, IV http://bura.brunel.ac.uk/handle/2438/7244 2013-02-18T15:25:40Z 2005-01-01T00:00:00Z

Title: Quasi-static stationary-periodic model of percussive deep drilling Authors: Mikhailov, SE; Namestnikova, IV Editors: Barla, G; Barla, M Abstract: In the percussively deep drilling, the rock is modeled by an infinite elastic medium with a semi-infinite cylindrical bore-hole having a curvilinear bottom. First, the stationary indentation is formulated as a non-classical non-linear free-boundary contact problem with unknown rupturing and non-rupturing parts of the bore-hole boundary. Then the stationary-periodic per- cussive drilling problem is reduced to the stationary one on the rupture progression stage of the cycle and to the classical contact problem on the reverse and progression-before-rupture stages of the cycle. This provides a nonlinear progression - force diagram for the bit dynamics prediction. Description: Copyright @ 2005 Patron Editore

2005-01-01T00:00:00Z Mikhailov, SE http://bura.brunel.ac.uk/handle/2438/7243 2013-02-18T15:24:57Z 2005-01-01T00:00:00Z

Title: Boundary-domain integro-differential equation of elastic damage mechanics model of stationary drilling Authors: Mikhailov, SE Description: Copyright @ 2005 EC Ltd

2005-01-01T00:00:00Z Mikhailov, SE http://bura.brunel.ac.uk/handle/2438/7242 2013-02-18T15:24:31Z 2005-01-01T00:00:00Z

Title: Analysis of boundary-domain integral and integro-differential equations for a Dirichlet problem with variable coefficient Authors: Mikhailov, SE Description: Copyright @ 2005 Birkhäuser

2005-01-01T00:00:00Z