Dynamic response of Epon 828/T-403 under multiaxial loading at various temperatures

Journal Article · Tue Jul 01 04:00:00 EDT 1997 · Journal of Engineering Materials and Technology

DOI:https://doi.org/10.1115/1.2812261· OSTI ID:524561

Chen, W; Zhang, X ^[1]

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1. Univ. of Arizona, Tucson, AZ (United States). Dept. of Aerospace and Mechanical Engineering

The mechanical response and failure behavior of Epon 828/T-403 epoxy were experimentally obtained over a strain rate range of 1.7 {times} 10{sup {minus}5} to 4.7 {times} 10{sup 3} s{sup {minus}1} and a temperature range of {minus}190 to 100 C. Compressive loads were applied in both uniaxial and multiaxial manners. A modified split Hopkinson pressure bar was employed to perform dynamic experiments, whereas an Materials Test System (MTS810) was used to conduct experiments under quasi-static loading conditions to establish the trends in strain-rate sensitivity. Multiaxial compression was achieved by installing snug-fit steel sleeves on the lateral surfaces of the cylindrical polymer specimens. The effects of temperature were studied by heating/cooling specimens to desired temperatures before mechanical loads were applied. The experimental results show that the yield strength of the polymer increases with increasing strain rate until adiabatic heating offsets the strain rate hardening. Lateral confinement significantly increases the axial yield strength. Increasing temperature reduces both yield strength and Young`s modulus.

• Sponsoring Organization: Sandia National Labs., Albuquerque, NM (United States)
• OSTI ID: 524561
• Journal Information: Journal of Engineering Materials and Technology, Journal Name: Journal of Engineering Materials and Technology Journal Issue: 3 Vol. 119; ISSN 0094-4289; ISSN JEMTA8
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DYNAMIC LOADS
EPOXIDES
EXPERIMENTAL DATA
FAILURES
MECHANICAL PROPERTIES
STRAIN RATE
STRAINS
STRESSES
TEMPERATURE DEPENDENCE
YIELD STRENGTH