August 2009

Criticism in scientific research

Author(s): Ashraf M. T. Elewa

August 2009

FE modeling along the SAF zone: Implication for the strong/weak SAF

  FE modeling under plane stress condition was used to analyze the state of stress and failure in and around the San Andreas Fault (SAF) System. This study mainly focused on the state of stress at the general seismogenic depth of 12 km, imposing elastic rheology. The purpose of the present study was to simulate the regional stress field, displacement vectors and failures. Series of calculations were performed...

Author(s): Matrika Prasad Koirala and Daigoro Hayashi

August 2009

An analytical pre-feasibility study to generate rotary-percussive concept in hard rock TBMs

  In this paper, an analytical modeling has been carried out to realize the effect of appending a supplementary percussive load to the rotary energy of tunnel boring machine's disc cutters, as a novel technology. In this path, two models have been built by using the theory of plasticity for prediction of the amount of penetration of a disc cutter assumed in form of a V-shaped indenter in rock medium. Since...

Author(s): Seyed-Mohammad Esmaeil Jalali and Masoud Zare Naghadehi