TY - GEN
T1 - EFFECT OF HEAT STABILIZATION AND SOLID LUBRICANTS ON HIGH STRAIN RATE RESPONSE OF POLYAMIDE 6
AU - Rodriguez, Luis Rafael Miranda
AU - Shah, Neel
AU - Haynes, Aisha S.
AU - Lim, Calvin
AU - Stout, Christopher G.
AU - Recchia, Stephen S.
AU - Pelegri, Assimina A.
N1 - Funding Information:
The authors kindly acknowledge the support of the personnel at the DEVCOM - Armaments Center at Picatinny Arsenal.
Publisher Copyright:
Copyright © 2021 by ASME and The United States Government
PY - 2021
Y1 - 2021
N2 - In this research, high strain rate impact testing of polyamide 6 composites (PA6) with different inclusions and processes is performed to assess the material response to increasing impact loads. Testing groups are divided into four categories depending on their inclusions and process: no inclusions, heat stabilized with no inclusions, oil & Molybdenum disulfide (MoS2), and glass fiber solid lubricant. Computational analysis is performed to obtain material properties such as dynamic modulus and stress-strain behavior from Split Hopkinson Pressure Bar (SHPB) tests. Out of the four groups, it was concluded that oil & MoS2 and glass fiber solid lubricant were more capable of maintaining dynamic modulus. In contrast, PA6 without any inclusions experienced a rapid decrease in dynamic modulus with increasing strain rate. Microscopic imagery is taken to evaluate crack formation in samples and sample deformation. Multiple side and edge cracks were developed from the specimens starting from a strain rate of 1900s-1; however, shattering of specimens was not experienced until above 2300s-1 strain rates were achieved. It is concluded that tested specimens experienced hardening trends at higher testing pressures and strain rates. A computational analysis is underway to establish the effect of heat stabilization and lubricant inclusions in PA6 strain rate-dependent mechanical response.
AB - In this research, high strain rate impact testing of polyamide 6 composites (PA6) with different inclusions and processes is performed to assess the material response to increasing impact loads. Testing groups are divided into four categories depending on their inclusions and process: no inclusions, heat stabilized with no inclusions, oil & Molybdenum disulfide (MoS2), and glass fiber solid lubricant. Computational analysis is performed to obtain material properties such as dynamic modulus and stress-strain behavior from Split Hopkinson Pressure Bar (SHPB) tests. Out of the four groups, it was concluded that oil & MoS2 and glass fiber solid lubricant were more capable of maintaining dynamic modulus. In contrast, PA6 without any inclusions experienced a rapid decrease in dynamic modulus with increasing strain rate. Microscopic imagery is taken to evaluate crack formation in samples and sample deformation. Multiple side and edge cracks were developed from the specimens starting from a strain rate of 1900s-1; however, shattering of specimens was not experienced until above 2300s-1 strain rates were achieved. It is concluded that tested specimens experienced hardening trends at higher testing pressures and strain rates. A computational analysis is underway to establish the effect of heat stabilization and lubricant inclusions in PA6 strain rate-dependent mechanical response.
KW - Dynamic loading
KW - Glass fibers
KW - Heat stabilization
KW - Polyamide 6
KW - Solid lubricants
KW - Split Hopkinson pressure bar
KW - Strain rate
UR - http://www.scopus.com/inward/record.url?scp=85124388352&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85124388352&partnerID=8YFLogxK
U2 - 10.1115/IMECE2021-73354
DO - 10.1115/IMECE2021-73354
M3 - Conference contribution
AN - SCOPUS:85124388352
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
BT - Mechanics of Solids, Structures, and Fluids; Micro- and Nano- Systems Engineering and Packaging
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2021 International Mechanical Engineering Congress and Exposition, IMECE 2021
Y2 - 1 November 2021 through 5 November 2021
ER -