Browsing Mechanical Engineering by Title
Now showing items 1-20 of 839
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3 dimensional characterizations of the impact damaged fiber reinforced composites
(American Society of Mechanical Engineers, 2013-11-15)Impact damages on the composites need to be understood thoroughly for the designing, manufacturing and repairing of the aircraft composite parts. Larger diameter of the impactor can create a shallow dent on the outside, ... -
3D engineered capillary evaporators for enhanced critical heat flux and heat transfer coefficient in pool boiling and vapor chamber
(Wichita State University, 2020-07)A major challenge in pool-boiling heat transfer lies in the limit of the Critical Heat Flux (CHF) and Heat Transfer Coefficient (HTC), which is caused by the poor counterflow of liquid and vapor over a heated surface, ... -
A comprehensive iterative design, simulation and finite element analysis of bare metal stent and diseased artery
(Wichita State University, 2015-12)Fatigue is a material failure due to cyclic forces acting upon said material. Fatigue can make the material fail before the stresses reach ultimate tensile strength or fracture strength. Intravascular coronary stent are ... -
A computational methodology for evaluation of the structural damage to a car and its occupant response for the new FMVSS 301R regulation as well as for various real-world rear-end collision scenarios
(Wichita State University, 2017-12)Due to requirements and continuous design improvement in automobile industries, it has become mandatory to keep passenger car and seating in automobile to safest at the time of a crash collisions. Although the rear-end ... -
A computational study of the dynamic responses of a composite versus a metallic aircraft fuselage structure in vertical impact along with examination of inclusion of struts and injury prediction of occupants
(Wichita State University, 2015-07)In recent years, the study on crashworthiness of aircraft fuselage section has been of great interest due to the increase in air travel and demand for occupant safety. The FAA conducted a series of drop tests on aircraft ... -
A computational study on static and unconstrained dynamic rollover crash tests of a mid-size SUV for various initial rollover parameters
(Wichita State University, 2018-05)In terms of frequency of accidents, rollover crashes are uncommon among all other crash types or directions. However, they are associated with highest fatality rate than any other crashes, as 33% of fatalities in automobile ... -
A design of experiment and Kriging-based model for studying the dynamics of multibody mechanical systems with revolute joint clearance
(Wichita State University, 2013-05)Over the last two decades, extensive work has been conducted to study the dynamic effect of the joint clearances in multibody mechanical systems. In contrast, little work has been devoted to optimize the performance of ... -
A generic Bayesian approach using Laplace approximation for model-based failure prognosis
(Wichita State University, 2013-12)A generic Bayesian framework using Laplace approximation for model-based remaining useful life prognosis is presented in this thesis. The developed generic Bayesian prognosis approach models and updates the remaining useful ... -
A hybrid finite element analysis of shot peen contour forming using residual stress measurements
(Wichita State University, 2013-07)In order to develop surfaces that have the proper curvature for aerospace structures, it is sometimes necessary to use shot peen forming, also known as contour forming, to create the desired shape in a piece of metal. Since ... -
A methodology utilizing spatial kinematics principles with angular rate sensor and accelerometer data to evaluate ATD head and leg flail kinematics in experimental aerospace seat dynamic impact testing
(Wichita State University, 2016-05)In dynamic aircraft crash testing, the head trajectory of an anthropomorphic test device (ATD) is typically recorded by photometric analysis from the high-speed video. While photometric analysis can provide useful data ... -
A novel approach to identify the difference in kinematic behavior of human model lower extremities with respect to muscle activation during impact crash responses using OpenSim
(Wichita State University, 2017-12)The main objective of this thesis is to develop a computational human musculoskeletal model to investigate the change in the kinematic behavior of the model's lower extremities under the influence of activated (active) and ... -
Activated carbon as an inexpensive alternative for counter electrode in dye sensitized solar cells
(Wichita State University, 2019-07)Dye Sensitized Solar Cells (DSSCs) have attracted a lot of attention from solar industries because of the low cost and high efficiency to convert energy from photo-to-electric. DSSCs mainly consist three parts, photoelectrodes ... -
Activated carbons of pistachio and acorn shells for supercapacitor electrodes with TEABF4/PC solutions as electrolytes
(Springer, 2020-01-14)The energy demands of the world have been accelerating drastically because of the technological development, population growth and changing in living conditions for a couple of decades. A number of different techniques, ... -
Adaptive impedance controller for prosthetic hand object grasping and manipulation
(Wichita State University, 2021-05)There are many complexities involving the human hand’s ability to perform stable grasping patterns. Human grasping is a complicated function to mimic in relation to prosthetic hands. Although there are various state-of-t ... -
Additive and subtractive laser-pulsed nano/micro machining of metal alloys for enhanced material properties, and numerical validation
(Wichita State University, 2020-05)This research focuses on two different aspects of laser machining process, namely additive and subtractive laser micromachining, for inherent improvements to metallic surfaces. In both the processes, material surfaces are ... -
Adhesiveless honeycomb sandwich structure with carbon graphite prepreg for primary structural application: a comparative study to the use of adhesive film
(Wichita State University, 2012-05)In the past two decades, researchers have been developing prepreg materials with matrix properties that can allow the elimination of the additional adhesive traditionally used between the core and the skins of composite ... -
Adsorption and capillary condensation in nanogap with nanoposts
(ASME, 2017)Adsorption isotherm and adsorption-capillary transition theories have been developed based on homogeneous micro-/nanoporous materials and structures. However, material and structures are often heterogeneous including local ... -
Adsorption and capillary transition in heterogeneous nanostructures using Grand Canonical Monte Carlo simulation
(Elsevier, 2018-08)Recent emerging nanotechnologies allow for demonstrating heterogeneous nanoporous structures. However, studies on the roles of heterogeneous nanostructures on adsorption and capillary transition are rare. Here, we examine ... -
Adsorption and capillary transition-controlled thermal diodes and switches using heterogeneous nanostructures
(Wichita State University, 2017-12)Thermal diodes and switches are systems that enable us to control thermal transport, preferentially in one direction, and switch "on"/"off" on demand. The main challenges of existing thermal diodes and switches are poor ... -
Adsorption thermal diode using nonequilibrium molecular dynamics simulation
(Wichita State University, 2016-04-29)The development of thermal diodes (heat transfer preferentially in one direction) is of great interest for advanced thermal and energy applications. However, their performance is limited due to the poor thermal rectification ...