Abstract
The Hopkinson split pressure bar (HSPB) was used for the testing of three polymers at strain rates between 102 to 103 s-1. Higher strain rates were achieved using the direct Hopkinson test. Experimental data were evaluated in time as well as in the frequency domain. A more detailed analysis in the frequency domain showed that the description of tested polymers can be described in the framework of the linear viscoelasticity. The use of the direct Hopkinson test showed the occurrence of a permanent strain.
Highlights
Polymeric materials with low mechanical impedance represent potential materials in light weight armour systems
It is needed to study the behavior of polymers at strain rates corresponding to the impact loading of materials
These data on compressive [1, 2, 12, 14, 20], tensile [3,13,21,22] and shear [8] stress-strain properties at high rates of strain of many polymers have been determined with the split Hopkinson pressure bar (SHPB) technique [9] and using a drop-weight apparatus [4,15,17,18]
Summary
Polymeric materials with low mechanical impedance represent potential materials in light weight armour systems. It is needed to study the behavior of polymers at strain rates corresponding to the impact loading of materials. These data on compressive [1, 2, 12, 14, 20], tensile [3,13,21,22] and shear [8] stress-strain properties at high rates of strain of many polymers have been determined with the split Hopkinson pressure bar (SHPB) technique [9] and using a drop-weight apparatus [4,15,17,18]. The constitutive model of the tested polymers is, viscoelastic-viscoplastic
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