Entries by Benjamin Boesl

Vishal DEA

Dissertation Evidence Acquisition (DEA) Fellowship
V. Musaramthota (Major Prof: N. Munroe, Co-Major Prof: B. Boesl)

Fall 2014, FIU University Graduate School

A nice entry

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Nulla consequat massa quis enim. Donec pede justo, fringilla vel, aliquet nec, vulputate eget, arcu. In enim justo, rhoncus ut, imperdiet a, venenatis vitae, justo. Nullam dictum felis eu pede mollis pretium. Integer tincidunt. Cras dapibus. Vivamus elementum semper nisi. Aenean vulputate eleifend tellus. Aenean leo ligula, porttitor eu, consequat vitae, eleifend ac, enim.

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Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem.

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  3. In enim justo, rhoncus ut, imperdiet a, venenatis vitae, justo.

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Entry with Post Format “Video”

Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem. Nulla consequat massa quis enim. Donec pede justo, fringilla vel, aliquet nec, vulputate eget, arcu. In enim justo, rhoncus ut, imperdiet a, venenatis vitae, justo.

Nullam dictum felis eu pede mollis pretium. Integer tincidunt. Cras dapibus. Vivamus elementum semper nisi. Aenean vulputate eleifend tellus. Aenean leo ligula, porttitor eu, consequat vitae, eleifend ac, enim. Aliquam lorem ante, dapibus in, viverra quis, feugiat a, tellus.

 

EML4501

EML 4501 syllabus

 

Catalog Description:

Continuation of design analysis of elementary machine elements, including lubrication bearings, and gearings. Introduction to advanced analysis techniques. Gear geometry, force, and nomenclature. Traditional and planetary gear trains. Design of spur, helical, bevel and work gears. Rollers, ball and journal bearings. Brakes,  clutches, belts and chains.

 

Prerequisite:

EML 3500 Mechanical Design I.

 

Course Objectives:

1. This course presents a review of mechanical elements such as gears, ball and journal bearings, belts, brakes, and so on.

2. Introduction to gear geometry and reaction forces. Gear trains. Traditional and  epicyclic/planetary gear trains. Spur, helical, bevel and worm gears. Design of spur and helical gears using AGMA procedure. Review of bevel and worm gear selection procedure.

3. Ball bearing design, selection of ball and cylindrical bearings, deep groove ball bearings, roller bearings. Journal bearings. Bearing characteristic number. Use of Raimondi-Boyd charts.

4. Open-ended design project to integrate various components.

Professional Organizations

American Institute of Aeronautics and Astronautics

AIAA Young Professionals Committee (YPC) Member

Member of the YPC Communications Sub-Committee

YPC Liaison to the Career and Workforce Development Committee

American Society of Composites

American Society of Mechanical Engineers

Faculty Advisor to the FIU ASME Student Chapter

Society for the Advancement of Materials and Process Engineering

Society of Tribologists and Lubrication Engineers

 

Characterization of Particle Dispersion in Nanocomposites

Imaging is completed using a JEOL dual beam focused ion beam. The electron gun is mounted vertically and has high resolution capabilities. The liquid gallium ion gun is mounted at a 52° angle to the electron gun. A microtome is used to plane the sample which is then mounted on a 45° SEM stub and coated with a Au for electrical conductivity. The high contrast of the images obtained by differences in atomic number between constituents. Charging of the polymer matrix is also avoided by the alternating passes of the negatively charged electron beam and the positively charged ion beam.

 

3D Reconstruction
Slice and view images reconstructed from approximately 100 square slices are shown in the bottom right corner. A 3D surface image of the dispersion of zinca particles is shown below. The primary images are approximately 5 square microns and the slices are 30 nm thick

 

 

Download our MATLAB Code for Dispersion Quantification

In situ Testing of Nano-Structured Materials

Description
In situ load frame for simultaneous loading and imaging of samples within the FIB chamber.

Capabilities
High resolution strain measurement
Programmable load or displacement control
Very low strain rates are achievable

Testing modes
Tension, Compression, Fatigue, Bending, Fracture,
Compact tension

 

Stage Specifications

Load Capacity: 4500N

Load Cell Acuracy: 0.2% Max Load

Maximum Stain Travel: 30mm

Linear Scale Accuracy: 20 nm resolution

 

Micro-Milling of Test Samples Using A Focused Ion Beam

The focused ion beam and omniprobe micro-manipulator can be used to micro-mill test samples and manipulate them for investigation of fracture mechanisms in nano-structured materials. Three sequential images of micro cantilevers are shown for a filled and unfilled polymer system. The reinforced polymer system shows increased tortuosity of the crack path and microcracking and crack pinning are present in the system.

 

A nice post

Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem.

Nulla consequat massa quis enim. Donec pede justo, fringilla vel, aliquet nec, vulputate eget, arcu. In enim justo, rhoncus ut, imperdiet a, venenatis vitae, justo. Nullam dictum felis eu pede mollis pretium. Integer tincidunt. Cras dapibus. Vivamus elementum semper nisi. Aenean vulputate eleifend tellus. Aenean leo ligula, porttitor eu, consequat vitae, eleifend ac, enim.