منابع مشابه
Drilling Damage in Composite Material
The characteristics of carbon fibre reinforced laminates have widened their use from aerospace to domestic appliances, and new possibilities for their usage emerge almost daily. In many of the possible applications, the laminates need to be drilled for assembly purposes. It is known that a drilling process that reduces the drill thrust force can decrease the risk of delamination. In this work, ...
متن کاملStudies on the Formation of Discontinues Rock Fragments during Drilling and Cutting Operation
* Corresponding author – [email protected] Tel: 414-229-4126 Fax:414-229-6958 ABSTRACT Understanding the fundamental tribology associated with the cutting of rock under extremely high pressure and high temperature (HPHT) conditions are extremely important in mining and drilling operations. In this paper, a rock fragmentation process is simulated during mechanical cutting of rock using an explicit...
متن کاملDeep Bed Filtration Modelling of Formation Damage Due to Particulate Invasion from Drilling Fluids
A Deep Bed Filtration model has been developed to quantify the effect of solids invasion from drilling fluids on the permeability of rock formations. The calculated particletrapping profiles are compared directly with experimental profiles from scanning electron microscopy and synchrotron X -ray diffraction tomography mapping. The computed permeability reduction as a consequence of particle inv...
متن کاملMulti Objective Optimization of Drilling Process Variables Using Genetic Algorithm for Precision Drilling Operation
The aim of this paper is to utilise genetic algorithm approach to investigate the effect of CNC drilling process variables such as spindle speed, drill diameter, material thickness, and feed rate on thrust force and torque generated during the drilling of mild steel plate using H.S.S drill. To find out the relationship between drilling process variable on thrust force and torque generated to th...
متن کاملRotary ultrasonic bone drilling: Improved pullout strength and reduced damage.
Bone drilling is one of the most common operations used to repair fractured parts of bones. During a bone drilling process, microcracks are generated on the inner surface of the drilled holes that can detrimentally affect osteosynthesis and healing. This study focuses on the investigation of microcracks and pullout strength of cortical-bone screws in drilled holes. It compares conventional surg...
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ژورنال
عنوان ژورنال: Open Journal of Fluid Dynamics
سال: 2013
ISSN: 2165-3852,2165-3860
DOI: 10.4236/ojfd.2013.32005