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University of Nebraska - Lincoln
Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research
- Discipline
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- Materials Science and Engineering (4)
- Biomechanical Engineering (3)
- Manufacturing (2)
- Medicine and Health Sciences (2)
- Applied Mechanics (1)
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- Biomedical Devices and Instrumentation (1)
- Biomedical Engineering and Bioengineering (1)
- Dental Materials (1)
- Dentistry (1)
- Engineering Science and Materials (1)
- Heat Transfer, Combustion (1)
- Medical Specialties (1)
- Other Materials Science and Engineering (1)
- Other Mechanical Engineering (1)
- Prosthodontics and Prosthodontology (1)
- Surgery (1)
- Tribology (1)
- Keyword
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- 3D printing (2)
- AISI52100 (1)
- Additive manufacturing (1)
- Anti-icing (1)
- Articulator (1)
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- Biodegradable Magnesium (1)
- Bioinspired (1)
- Brick and Mortar (1)
- Casting (1)
- Condyle (1)
- Damage (1)
- Deformation Mechanisms (1)
- Dental (1)
- Dental implant (1)
- Directed energy deposition (1)
- Femtosecond laser (1)
- Finite element analysis (1)
- Fracture (1)
- High Velocity (1)
- Impact (1)
- Interface Structure (1)
- Jaw (1)
- Kalthoff Winkler (1)
- Laser shock peening (1)
- Magnesium (1)
- Mandible (1)
- Maxilla (1)
- Medical Trainer (1)
- Microstructures (1)
- Minimally Invasive (1)
Articles 1 - 8 of 8
Full-Text Articles in Engineering
Drop Generation Using Cross-Flow In Rigid Body Rotation, Haipeng Zhang
Drop Generation Using Cross-Flow In Rigid Body Rotation, Haipeng Zhang
Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research
Inspired by crossflow membrane droplet generation and microfluidic droplet generation, I propose an easy method to generate monodisperse drops using cross-flow caused by rigid body rotation. In this approach, a dispersed phase (DP) liquid was injected through a stationary vertical needle into an immiscible continuous phase (CP) liquid which was in rigid body rotation. A DP drop growing at the end of the needle experienced fluid dynamic forces from the horizontal CP flow, and it was detached from the needle when it had grown to a certain size. This study investigated the relationship between the resultant size of drops and …
Study Of The Femtosecond Laser Processed Surfaces, Imprinting, And Casting For Changing The Wettability Of Surfaces, Yingxiao Song
Study Of The Femtosecond Laser Processed Surfaces, Imprinting, And Casting For Changing The Wettability Of Surfaces, Yingxiao Song
Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research
Femtosecond Laser Surface Processing (FLSP) is a technology to fabricate micro/nano surface structures. These patterned surface structures show great importance in many applications, especially in controlling the wettability of the surface. Imprinting is a typical method for manufacturing large volumes of surfaces. This study combines two processes (FLSP and stamping) together to produce a surface structure similar to the original FLSP surface. In the first step, micro/nano structured surface mounds were fabricated by femtosecond laser processing. Then, these FLSP surfaces served as molds for subsequent imprinting to replicated the “negative” surface on a blank material. Surface morphology and peak-to-valley roughness …
Design Of Parallel Robot For Dental Articulation And Its Optimization, Abulimiti Delimulati
Design Of Parallel Robot For Dental Articulation And Its Optimization, Abulimiti Delimulati
Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research
A dental articulator is a mechanical device used to simulate the relative position and motion between the upper and lower jaw when constructing and testing dental prostheses. Typically, it can be adjusted to approximate patient-specific jaw kinematics in order to analogue the static relationship and specific motions of a patient’s mandible to maxilla. However, the use of dental articulators is essentially a trial-and-error method in order to fine-tune fit and function of a dental prosthesis. Some of the most advanced current dental articulators can reproduce the position and the motion passively; furthermore, dentists need special training for measuring patients’ maxillofacial …
Interface Structure And Deformation Mechanisms Of Mg/Nb Multilayers, Xinyan Xie
Interface Structure And Deformation Mechanisms Of Mg/Nb Multilayers, Xinyan Xie
Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research
Magnesium (Mg) and its alloys, as the lightest structural materials, are very attractive for a range of weight sensitive applications, such as aircraft engine, transportation industry and so on. However, their further applications are limited due to the weak properties, such as the low strength and poor ductility. In recent years, advanced techniques aiming at the modification of the microstructures, have been developed to promote the properties of Mg and its alloys, such as modifying the texture, refining the grain size, forming the intermetallic phase, and introducing the interfaces or stacking faults into the systems. Constructing Mg/Nb multilayers, which introduces …
Peridynamic Modeling Of Dynamic Fracture In Bio-Inspired Structures For High Velocity Impacts, Sneha Akula
Peridynamic Modeling Of Dynamic Fracture In Bio-Inspired Structures For High Velocity Impacts, Sneha Akula
Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research
Bio-inspired damage resistant models have distinct patterns like brick-mortar, Voronoi, helicoidal etc., which show exceptional damage mitigation against high-velocity impacts. These unique patterns increase damage resistance (in some cases up to 3000 times more than the constituent materials) by effectively dispersing the stress waves produced by the impact. Ability to mimic these structures on a larger scale can be ground-breaking and could be used in numerous applications. Advancements in 3D printing have now made possible fabrication of these patterns with ease and at a low cost. Research on dynamic fracture in bio-inspired structures is very limited but it is …
Modeling Residual Stress Development In Hybrid Processing By Additive Manufacturing And Laser Shock Peening, Guru Charan Reddy Madireddy
Modeling Residual Stress Development In Hybrid Processing By Additive Manufacturing And Laser Shock Peening, Guru Charan Reddy Madireddy
Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research
The term “hybrid” has been widely applied to many areas of manufacturing. Naturally, that term has found a home in additive manufacturing as well. Hybrid additive manufacturing or hybrid-AM has been used to describe multi-material printing, combined machines (e.g., deposition printing and milling machine center), and combined processes (e.g., printing and interlayer laser re-melting). The capabilities afforded by hybrid-AM are rewriting the design rules for materials and adding a new dimension in the design for additive manufacturing paradigm. This work focuses on hybrid-AM processes, which are defined as the use of additive manufacturing (AM) with one …
Effect Of Shot Peening On Stress Corrosion Behavior Of Biodegradable Magnesium We43, Tejaswita Patil
Effect Of Shot Peening On Stress Corrosion Behavior Of Biodegradable Magnesium We43, Tejaswita Patil
Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research
Conventionally used metals for orthopedic devices made of titanium, stainless steel, and Co-Cr alloys are designed to be permanently implanted. However, long-term complications arise and a secondary implant removal surgery is often necessary. A mismatch in stiffness between the bone and implant results in stress shielding that negatively affects bone density. To overcome these problems, magnesium alloys (e.g., WE34) are favored due to a lower Young’s modulus (45 GPa) and biodegradability. The critical technical barrier with magnesium alloys is their high corrosion rate in physiological (salt-based) environments. One solution is to use surface treatments, such as shot peening (SP), to …
Ring And Peg Simulation For Minimally Invasive Surgical Robot, Evan Brown
Ring And Peg Simulation For Minimally Invasive Surgical Robot, Evan Brown
Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research
Surgical procedures utilizing minimally invasive laparoscopic techniques have shown less complications, better cosmetic results, and less time in the hospital than conventional surgery. These advantages are partially offset by inherent difficulties of the procedures which include an inverted control scheme, instrument clashing, and loss of triangulation. Surgical robots have been designed to overcome the limitations, the Da Vinci being the most widely used. A dexterous in vivo, two-armed robot, designed to enter an insufflated abdomen with a limited insertion profile and expand to perform a variety of operations, has been created as a less expensive, versatile alternative to the Da …