Engineering Project Reports, Dissertation, Engineering Thesis, Working Papers, Examples, Tips, Resources and Information
In this dissertation, a framework is developed and demonstrated for the use of a new shape measurement system consisting of fiber Bragg grating (FBG) based strain sensors, a shape determination algorithm based on Frenet frames, and a signal processing algorithm based on
Micromechanical sequential-leaf time delay mechanisms based on SOI/DRIE technology have been designed, fabricated, and characterized. The devices were designed as elements of a larger fuzing system for rifled munitions, in which a passive timing mechanism triggers at a predetermined rotational speed, followed
The effect of process-induced voids on the durability of Sn-Pb and Pb-free solder interconnects in electronic products is not clearly understood and researchers have reported conflicting findings. Studies have shown that depending on the size and location, voids are not always detrimental
Providing a defensible basis for allocating resources for critical infrastructure and key resource protection is an important and challenging problem. Investments can be made in countermeasures that improve the security and hardness of a potential target exposed to a security hazard, deterrence
Actions such as the WEEE Directive and RoHS Directive are forcing electronics suppliers to transition their products from tin-lead to lead-free solder in order to support consumer goods. The defense and avionics industries obtain their parts from the same suppliers and must
In this thesis, the application of Cosserat mechanics to micro-scale structures is explored. Different structures considered include micro-scale gyroscopes, micro-cantilevers, and clamped-clamped micro-structures. Two-dimensional formulations with nonlinearities up to third order are derived and presented. Different parameterization schemes are used and the
A novel method of fabricating functionally graded extruded composite materials is proposed for propellant applications using the technology of continuous processing with a Twin-Screw Extruder. The method is applied to the manufacturing of grains for solid rocket motors in an end-burning configuration
In a refrigeration cycle, condensed liquid refrigerant is expanded to a two-phase fluid entering the evaporator. In many applications, the evaporator paths are divided into a number of parallel sections to keep the pressure drop across the evaporator within a reasonable range
Often complex molded parts include undercuts, patches on the part boundaries that are not accessible along the main mold opening directions. Undercuts are molded by incorporating side actions in the molds. Side actions are mold pieces that are removed from the part
Assistive ambulatory devices with axillary supports are compared using a multidisciplinary approach. Axillary supports are commonly referred to as “shoulder supports” on standard crutches. A framework is presented that compares axillary supports based on loading characteristics during initial contact and during a