Polymer matrix composites have shown improved properties over traditional materials especially when considering weight normalized properties such as specific strength and stiffness. While this has been known for some time, the implementation of composites as structural materials still have complications due to limitations in bonding and fastening complex geometries.  Currently, composite panels bonding is completed primarily through the drilling of holes in critical locations within the panel and securing with the use of fasteners such as rivets and bolts. The mechanical fasteners link multiple panels together and also provide an added level of protection by mechanically limiting propagation of failure originating near the bond but in the panel itself. While this process is effective there is a significant weight cost, and the manufacturing of the necessary hole geometries has significant implications for overall performance, resulting in elevated stress concentration levels and delamination in the composite panel. Mechanical fasteners have consistently lead to significant over-design and a loss in overall efficiency gained from the improved specific strength.

Effect of Surface Contamination on Composite Bond Integrity and Durability
Dwayne McDaniel (PI), Benjamin Boesl (Co-PI)

Sept 2016 – Sept 2017, Federal Aviation Administration, JAMS Center of Excellence, 12-C-AM-FIU-005

Deformation Mechanism in Graphene Nanoplatelet Reinforced Tantalum Carbide using High Load In situ Indentation
C. Zhang, B. Boesl, L. Silverstoni, D. Sciti, A. Agarwal

Materials Science and Engineering A 674 (2016) 270-275

Additive Manufacturing via Surface Engineering
N.B. Dahotre, H.D. Vora, B. Boesl

JOM 68 (2016) 7 1-4

Oxidative Unzipping and Transformation of High Aspect Ratio Boron Nitride Nanotubes into “White Graphene Oxide” Platelets
P. Nautiyal, A. Loganathan, R. Agrawal, B. Boesl, C. Wang, A. Agarwal

Scientific Reports 6 (2016) 29498

Directionally Aligned Ultra-long Boron Nitride Nanotube Induced Strengthening in Aluminum based Sandwich Composite
P. Nautiyal, C. Rudolf, A. Loganathan, C. Zhang, B. Boesl, A. Agarwal

Advanced Engineering Materials (2016) doi:10.1002/adem.201600212

Real time monitoring of twin boundary motion in polycrystalline magnetocaloric Ni2+xMn1-xGa by in situ focused ion beam microscopy
R. Nikkhah-Moshaie, G. Bourne, M. Kirsch, B. Boesl

Materials Letters 180 (2016) 273-276

Investigations of Ar ion irradiation effects on nanocrystalline SiC thin films
V. Craciun, D. Craciun, G. Socol, S. Behdad, B. Boesl, C. Himcinschi, H. Makino, M. Socol, D. Simeone

Applied Surface Science 374 (2016) 339-345

TaC-NbC Formed by Spark Plasma Sintering with the Addition of Sintering Additives
C. Rudolf, A. Agarwal, B. Boesl.

Journal-Ceramic Society Japan 124, 4 (2016) 381-387

A facile approach to the synthesis of multi-walled carbon nanotube-polyhedral oligomeric silsesquioxane (POSS) nanohybrids
S.M. Sabet, H. Mahfuz, A.C. Terentis, J. Hashemi, B. Boesl

Materials Letters 168 (2016) 9-12

Improvement of Aging Kinetics and Precipitate Size Refinement in Mg-Sn alloys by Hafnium Additions
S. Behdad, L. Zhou, H.B. Henderson, M. Manuel, Y. Sohn, A. Agarwal, B. Boesl

Materials Science and Engineering A 651 (2016) 854-858

Structural and Mechanical Properties changes induced in nanocrystalline ZrC Thin Films by Ar Ion Irradiation
D. Craciun, G. Socol, D. Simeone, S. Behdad, B. Boesl, B.S. Vasile, V. Craciun.

Journal of Nuclear Materials 468 (2016) 78-83

In Situ Mechanical Testing Techniques for Real-time Materials Deformation Characterization
C. Rudolf, B. Boesl, A. Agarwal

JOM 68 (2015) 136-142

Diffusion kinetics, mechanical properties, and crystallographic characterization of intermetallic compounds in the Mg–Zn binary system
C. Kammerer, S. Behdad, L. Zhou, M. Gonzalez, B. Boesl, Y.H. Sohn

Intermetallics 67 (2015) 145-155

In situ Indentation Behavior of Bulk Graphene Nanoplatelets with Respect to Orientation
C. Rudolf, B. Boesl, A. Agarwal

Carbon 94 (2015) 872-878

Analysis of Thin Films that Exhibit Significant Plastic Deformation: A Modified Winkler Approach
B. Boesl, G.R. Bourne

Journal of Materials Research 30, 13 (2015) 2055-2063

EMA5507C: Analytical Techniques in Material Science

Fundamental theories and techniques of the analytical methods for materials including: X-ray diffraction, scanning and transmission electron microscopy, thermal and surface analysis, and vacuum systems. Prerequisite: EGN 3365.

 

Semester Taught: Spring 2013, Fall 2013, Fall 2014

 

EMA5295: Principles of Composite Materials

The mechanical behavior of composite materials used in the automotive, aircraft and sporting goods industries; material and laminar properties; design of composites; failure analysis; and environmental effects. Prerequisites: EGM 5615 or permission of the instructor.

 

Semester Taught: Fall 2013, Fall 2014, Spring 2016

 

EGM 6570: Fracture Mechanics

Griffith’s and Irwin’s fracture criteria; stress intensity factors evaluation; crack- tip plastic zone; fracture toughness measurement; crack initiation; fatigue crack growth; stress corrosion cracking. Prerequisite: EGM 5615.

 

Semester Taught: Spring 2015

EML3500: Mechanical Design I

Introduction to the design process. Review of static and dynamic loading, resulting normal and shear stresses, principal stresses. Engineering materials, static and fatigue failure theories. Machine element design including screws, bolts, fasteners, welded joints. Open-ended design projects.

 

Semester Taught: Spring 2013, Spring 2014, Spring 2015, Spring 2016, Fall 2016

 

EML4501: Mechanical Design II

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.

 

Semester Taught: Fall 2012, Fall 2013, Fall 2014, Fall 2015

 

EML4905: Capstone Senior Design

Supervision and evaluation of capstone senior design projects

 

2016 Design of Airfoils for VAWT (E. Moore, M. Dennison, E. Gutierrez)

2015 NASA Hybrid Rocket Launch Team (M. Gonzales, G. Lombarid, C. Hayes)

2014 Nanoindenter Force Converting Stage (P. Wong, J. Carbillo, E. Camacho)

2014 Pneumatic Torque Wrench (R. Lucia, M. Hildago, L. Cruz)

2014 Hanford Tank Inspection Device (G. Vazquez, D. Giraldo, J. Arenilla)

2014 GLOBAL Bike (X. Prugue, R. Ruyani, J. Goolcharan)

2014 Sub Automatic (C. Bonilla, O. Tavares, D. Peija)

2013 Prototype Magnetic Refrigerator (M. Lizano, F. Iriarte, E. Garcia)

2013 Adjustable Spinal Cage (P. Medrono, C. Dominguez, J. Crisp)

2013 Material Selection Mechanism (H. Garcia, J. Rocha, M. Mohamadapour)

2013 Highway Wind Capture Device (B. Champagnie, A. Simonis, G. Altenor)

Splat Sliding in Cold Sprayed Coatings
Arvind Agarwal (PI), Benjamin Boesl (Co-PI)

Sept 2016 – Sept 2017, Army Research Laboratory

DURIP: Acquisition of In Situ Nanoindenter for Studying Deformation and Damage Mechanisms in Nanocomposites and Small Scale Features
Benjamin Boesl (PI), Arvind Agarwal (Co-PI)

June 2016 – June 2017, Office of Naval Research, N00014-16-1-2604