Browsing Mechanical Engineering by Author "Bahr, Behnam"
Now showing items 1-20 of 21
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Analysis of delamination in drilling of circular plate composite materials with a multi-facet drill bit
Kolhar, Arvind Shrikant (Wichita State University, 2007-05)Delamination is recognized as one of the most critical defects that can result from the machining of composites. Delamination has been a major form of failure in drilled composite materials due to the composite’s lack of ... -
Analysis of orthogonal edge trimming of uni-directional composites: numerical, analytical, and experimental approach
Jahromi, Ashkan S. (Wichita State University, 2010-05)As the use of composites increases, more problems arise with processing and manufacturing of this type of material in order to make it a more durable and reliable for today’s applications. One of the most important problems ... -
Analysis of surface finish in drilling of composites using neural networks
Madiwal, Shashidhar (2006-07)Composite materials are widely used in the aerospace industry because of their high strength-to-weight ratio. Although they have many advantages, their inhomogeneity and anisotropy pose problems. Because of these properties, ... -
An analytical method for predicting damage zone in orthogonal machining of unidirectional composites
Jahromi, Ashkan S.; Bahr, Behnam; Krishnan, Krishna K. (SAGE Publications, 2014-11)The objective of this research was to study chip formation mechanisms in order to predict damage in the orthogonal machining of unidirectional polymer-matrix composites by experimentation and analysis. This study presents ... -
Analytical modeling of metallic honeycomb for energy absorption and validation with FEA
Jeyasingh, Vinoj Meshach Aaron (2005-05)Honeycomb materials possess high energy absorption characteristics and are useful for the impact protection of structural members. Various honeycomb configurations are being developed for a variety of applications. Analytical ... -
Control of a passive dynamic compass gait walking robot using neural network central pattern generator
Park, Hyun Min (Wichita State University, 2016-08)Important features in human walking are the passive dynamic nature of its gait and its rhythmic nature, generated from the Central Pattern Generator (CPG) in a human's spinal cord. The passive dynamic mechanism has been ... -
Design of bipedal walking robot and reduction of dynamic impact in joints
Malakar, Bijaya (2006-05)Bipedal walking robots have distinguished themselves from other robots not only for their better mobility but also for the increased amount of complexity in their architecture. The issue of walking stability has inherently ... -
Design of haptic force feedback for catheter insertion mechanism
Patel, Nikunj Manubhai (2006-12)The objective of this thesis is to design a system which can perform catheter insertion into a human body with haptic feedback. The haptic feedback will consist of a system; a surgeon can use to feel forces in his hand ... -
Effect of cutting temperatures on the hole quality of a carbon-fiber composite
Rahman, Khan Habeeb Ur; Bahr, Behnam (Wichita State University. Graduate School., 2008-04-25)The drilling of composites project is aimed at minimizing delamination and reducing the fiber pull out, thereby improving the hole quality. The heat generated during drilling has an adverse effect on the hole quality. So ... -
Effects of multi-wall carbon nanotubes on the mechanical properties of polymeric nanocomposites
Shenoy, Kasargod Anil (Wichita State University, 2008-05)The addition of carbon nanotubes into a variety of nano-composites permits the enhancement of properties like mechanical strength, conductivity and corrosion resistance thus making them more functional. In the present ... -
Evaluation of drill bit performance for carbon-fiber composites
Rahman, Khan Habeeb Ur (Wichita State University, 2008-12)Ever since composite materials have been used in the aerospace industry, there have been problems with cutting and machining them. One of the reasons for this problem was the dearth of available tooling to machine composites. ... -
Evaluation of nanoparticles iron-molybdate catalyst using physical properties measurements
Al-Ghanem, Hussain (2006-12)Mössbauer spectroscopy, X-ray spectroscopy, SEM, EDX, heat capacity and SQUID measurement were carried out in conjunction with a catalytic study on mixed Fe-Mo oxides, some of which have been used in selective oxidation ... -
Evaluation of post-weld heat treatments for corrosion protection in friction stir welded 2024 and 7075 aluminum alloys
Widener, Christian Aragon (2005-12)This dissertation presents the results of an investigation into the corrosion resistance of friction stir welding (FSW) for aerospace structures. Two of the most common aerospace aluminum alloys, 2024 and 7075, were ... -
Experimental investigation and analysis for bearing strength behavior of composite laminates
Yeole, Amit (2007-05)An investigation of joint strength in bolted connections for Carbon unitape material [0/45/-45/90]3s is presented. The simple case of bearing double shear joint is considered. In the first stage the objective of work was ... -
Finite element based modeling of magnetorheological dampers
Malankar, Kedar Prakash (2006-12)For an efficient damper design, a design engineer always faces the challenge of providing the largest forces in the most compact and efficient envelope. It is important to identify the nature of the force required at the ... -
Finite element simulation of 3D drilling in unidirectional CFRP composite
Palani, Vijayakumar (2006-05)Drilling is probably the most important conventional mechanical process and it is the most widely used machining operations. Prediction of cutting forces for any set of cutting parameters is essential in optimal design and ... -
Investigation of the effect of different parameters in the drilled hole quality in composite materials
Sahraie Jahromi, Ashkan; Rahman, Khan Habeeb Ur; Bassi, R.; Bahr, Behnam (Wichita State University. Graduate School., 2007-04-27)Two different delamination mechanisms that need to be controlled by the drill geometry and thrust force will be observed in the drilling of composites. The studies which have been done up to now focus on the thrust ... -
Oblique machining of uni directional carbon fiber reinforced polymer composites
Gudimani, Gurusiddeshwar (Wichita State University, 2011-05)Composite materials have a wide range of applications in aerospace and automotive industries due to the advantage of their tailorability when manufacturing. These materials are manufactured near net shape but post-production ... -
Orthogonal machining of uni-directional carbon fiber reinforced polymer composites
Chennakesavelu, Ganesh (Wichita State University, 2010-08)This research basically deals with Orthogonal Machining of Unidirectional Carbon Fiber Reinforced Polymer (FRP) Composites as secondary operations like machining is a very important process in composites manufacturing. ... -
Prediction of variation in dimensional tolerance due to sheet metal hydroforming using finite element analysis
Pandya, Rajen Subhashchandra (2006-05)Hydroforming of aluminum sheets is very important in the aircraft industry, due to the advantages of less wrinkling and cost effectiveness. Numerous research has been conducted in this field, which deals with the development ...