ISME Theses and Dissertations
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Item 3D printing of polyblend calcium carbonate (grout) using binder jetting technology(Wichita State University, 2024-07) Al Turk, Abdelhakim Abdullah; Weheba, GamalAdditive Manufacturing (AM) is a form of layered manufacturing. It utilizes a class of machines designed to recreate a physical structure from a 3-dimensional Computer-Aided Design (CAD) model by quick and highly automated means. The technology has gained a strong reputation in the aerospace and medical industries, and its use is now considered revolutionary in the construction industry. This research aimed at providing proof of the concept that polyblend calcium carbonate (grout) can be used as a material on a binder jetting 3D printer. In achieving the project objective tile specimens were constructed. This research investigated the effect of using different layer thickness, binder saturation levels, curing solutions and curing time on the 3D printed tiles. The deviation from nominal, the breaking strength, and surface roughness were measured and considered in determining the process parameters. The statistical analysis of the results indicated that the maximum breaking strength that tile specimens can reach is 2.98 KN. The minimum deviation in the Z direction of 0.01165” (0.3 mm) was observed when specimens were cured in an alkaline solution for 28 days. Moreover, lower surface roughness was obtained when the maximum binder saturation was used. One of the applications of this research is to 3D print mosaics and decorative tiles (PEI 0) since the achieved breaking strength exceed the ANSI (A137.1:2022) standard recommendation. These 3D-printed tiles can be used as ornamentation on walls in cottages, hotels, churches, and mosques. This research allows for the replication of precise replicas of historical façade to be used in restoring historical structures. In addition to that, high voltage insulators can be another area for future research by applying the finding of the proposed research.Item CNC machine control for high tolerance aerospace production(Wichita State University, 2024-05) Towner, Ridge Daniel; Moscoso-Kingsley, WilfredoThis research is motivated by the needs for advanced processes and control methods for CNC machines in the aerospace industry. Generally, more metal is removed from a workpiece than what is remaining in the machine after processing. This requires use of all types of tooling, cutters, drills, spindles, drive systems, actuators, controls, processes, etc. Countless decisions by analysts, engineers, planners, machinists, and managers, and the complex physics that govern machine tool movement, accuracy and repeatability demand post-machining quality control measurements be implemented. The ex-situ nature of the typical quality control systems increase cycle time and costs. In-situ quality control is proposed here as an alternative to reduce cycle time and cost, while increasing quality. For this purpose, a (CNC) machine tool was equipped with direct computer control coordinate measuring software and high accuracy contact probing. This special CNC is validated for its capability for self-health monitoring and in-situ part quality control. The validation conforms to international standards for performance evaluation of commercially available coordinate measuring machines (CMMs). The capability of the CNC system to perform CMM-type measurements is demonstrated via a case study. The equivalency between part dimensional measurements obtained directly from the use of the CNC machine tool as a CMM and from part dimensional measurements performed using commercially available CMMs is established via a correlation study. The self-health checks were run for a period of one-year and the measurements are analyzed statistically using standard SPC methods.Item Modeling and analysis of accessibility to the food opportunity system in Sedgwick County, Kansas(Wichita State University, 2024-05) Maldonado-Mundo, Franseira; Cure, LailaFood accessibility has been a growing interest by the United States government due to the negative impact on the population’s health such as obesity, chronic illness, and premature death. This thesis investigated existing and potential quantitative food access measurement models to support decisions to improve food access. A gap was identified in research assessing food access measurement methods for policymakers to proactively support actionable decisions to improve accessibility. There was an opportunity to incorporate individual and community considerations that would reflect a more realistic measurement of food access. A proposed integer program was proposed for individual navigation of the food opportunity system in Sedgwick County, Kansas. The formulation considers potential requirements and limitations of individuals seeking food assistance and the food opportunities available to them. The output of the proposed formulation recommends a set of locations and times for individuals to acquire the food they need at minimal cost. Ultimately, the illustration of the use of the life-constrained accessibility in the food opportunity system with a hypothetical sample of individuals with varied characteristics generated from census data. The thesis compares the assessment of access to the conventional perspective. It was confirmed that conventional measures overestimate the individual’s ability to obtain the food they need.Item Parametrization study of suspension damping via finite element analysis(Wichita State University, 2024-05) Fernandez-Cano, Daniel; Boldsaikhan, Enkhsaikhan; Lopez, AlejandroDampers are used to absorb energy associated with undesirable vibration or force. In a passive suspension damping system, a direct interaction between the fluid and structural components is apparent. This thesis primarily focuses on conducting a systematic examination of cartridge valve emulators utilizing Finite Element Analysis (FEA). Simulations fulfill the theoretical premise on which cartridge dampers are based. A cartridge damper uses a valving mechanism to control the damping of the system by the passage of fluid through an orifice that is regulated by an elastic stack of plates or shims. Energy is not only absorbed by the elastic deformation of shims but also regulated by the changing restriction of flow through the orifice. After creating a cartridge damper model, this study concentrates on parametrizing the behavior of the damper in relation to the design parameters of shims using the FEA method. Variations in individual parameters, such as the shim length and the shim thickness are analyzed in relation to the damping force of suspension. All the results are achieved solely through the use of FEA within the Ansys software along with the following programs: Fluid Flow (Fluent), Transient Structural, and Coupled System. Fluid Flow (Fluent) and Transient Structural are connected through fluid-solid interactions provided by Coupled System for feedback. Based on the simulation results, it is assumed that the parametrization of cartridge valves is effective for achieving the proper operation of cartridge dampers.Item Identifying manufacturing system states through simulation for use in industry 4.0(Wichita State University, 2024-05) Parikh, Yogesh B.; Krishnan, Krishna K.; Gupta, Deepak P.The history of Manufacturing and Manufacturing Systems is very rich. Therefore, the research literature is also bountiful. Historically, the cost structure of manufactured products is composed of Material, Labor and Facility. Research literature on each of these components by itself is also abundant. Material cost is mostly viewed from Material Handling Systems (MHS) logistics perspective. MHS is further viewed as external and internal to the business. Labor Cost (LC), although very critical, and by its nature very complex, is either considered determinant or not considered at all. Facility is further studied from layout perspective as well as scheduling perspective. Facility may comprise of many sub systems including but not limited to physical assets (Building and Machinery) and soft assets such as databases, computing software and business intelligence. Together, they are termed Production Systems (PS). A decision maker in a Job Shop, specialized in aerospace parts production company, on a typical day, is faced with all three components of cost. Therefore, optimized utilization of these three resources together becomes a necessity. An outline of an integrated approach in decision making is proposed in this research.