MS Thesis Defense by Mr. Karoly F. Fodor
When: Friday,
July 21, 2017
11:00 AM
-
1:00 PM
Where: Textiles Building 101E
Description: The Mechanical Engineering Department is pleased to announce the following:
Master of Science Thesis Defense by Mr. Karoly F. Fodor
DATE:
Friday, July 21, 2017
TIME:
11:00 a.m. – 1:00 p.m.
LOCATION:
Textile Building, Room 101E
TOPIC:
Viscoelastic and In-Plane Shear Properties of Novel Energy Absorbing Materials
ABSTRACT:
Flocked energy absorbing material, or FEAM, is a novel form of pseudo-composite material that has potential
relevance in a wide range of engineering applications. FEAM consists of monofilament fibers of different deniers
flocked onto substrates in varying densities to form single or double-sided layers that are separated by fabric
dividers. When used for impact protection, FEAM absorbs energy through the buckling of the monofilament
fibers. Because this class of materials is relatively new, much of its mechanical behavior is not fully understood.
This study aims to address this by investigating the dynamic viscoelastic and in-plane shear strengths of FEAM
in various configurations. The tan(δ) of FEAM was determined with a purpose built dynamic mechanical analyzer
while varying flock length, density and denier, along with temperature and frequency. These results were
compared with the dynamic mechanical properties of Sorbothane®, which was used as the calibration material.
In addition, FEAM samples will be subjected to shear in the plane normal to the flocked fibers in a double lap
shear jig under medium strain rates using a guided weight drop tower.
ADVISOR:
Dr. Vijay Chalivendra, Department of Mechanical Engineering, UMD (vchalivendra@umassd.edu, 508-910-6572)
COMMITTEE MEMBERS:
Dr. Jun Li, Department of Mechanical Engineering, UMD
Dr. Yong Kim, Department of Bioengineering, UMD
Open to the public. All MNE students are encouraged to attend.
Master of Science Thesis Defense by Mr. Karoly F. Fodor
DATE:
Friday, July 21, 2017
TIME:
11:00 a.m. – 1:00 p.m.
LOCATION:
Textile Building, Room 101E
TOPIC:
Viscoelastic and In-Plane Shear Properties of Novel Energy Absorbing Materials
ABSTRACT:
Flocked energy absorbing material, or FEAM, is a novel form of pseudo-composite material that has potential
relevance in a wide range of engineering applications. FEAM consists of monofilament fibers of different deniers
flocked onto substrates in varying densities to form single or double-sided layers that are separated by fabric
dividers. When used for impact protection, FEAM absorbs energy through the buckling of the monofilament
fibers. Because this class of materials is relatively new, much of its mechanical behavior is not fully understood.
This study aims to address this by investigating the dynamic viscoelastic and in-plane shear strengths of FEAM
in various configurations. The tan(δ) of FEAM was determined with a purpose built dynamic mechanical analyzer
while varying flock length, density and denier, along with temperature and frequency. These results were
compared with the dynamic mechanical properties of Sorbothane®, which was used as the calibration material.
In addition, FEAM samples will be subjected to shear in the plane normal to the flocked fibers in a double lap
shear jig under medium strain rates using a guided weight drop tower.
ADVISOR:
Dr. Vijay Chalivendra, Department of Mechanical Engineering, UMD (vchalivendra@umassd.edu, 508-910-6572)
COMMITTEE MEMBERS:
Dr. Jun Li, Department of Mechanical Engineering, UMD
Dr. Yong Kim, Department of Bioengineering, UMD
Open to the public. All MNE students are encouraged to attend.
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