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Title: A technique for rapid two-stage dynamic tensile loading of polymers
Authors: Shim, V.P.W. 
Yuan, J. 
Lee, S.-H.
Keywords: Dynamic tension
Hopkinson bar
Stress wave
Two-stage loading
Issue Date: 2001
Citation: Shim, V.P.W.,Yuan, J.,Lee, S.-H. (2001). A technique for rapid two-stage dynamic tensile loading of polymers. Experimental Mechanics 41 (1) : 122-127. ScholarBank@NUS Repository.
Abstract: A method for rapid two-stage dynamic-dynamic tensile loading of polymers, based on a tensile Hopkinson bar apparatus, is established. In this technique, the initial incident wave and its reflection are used to load a specimen in quick succession. Consequently, the specimen is stressed, momentarily unloaded, then reloaded until fracture. By adopting appropriate assumptions, a procedure to obtain the associated stress-strain curves for such double-stage loading is formulated. These assumptions are examined experimentally and analytically to substantiate their validity. To verify the proposed approach, a relatively rate-insensitive material, LEXAN 141 polycarbonate, was subjected to two-stage dynamic tension. The stress-strain curves obtained via the procedure established were compared with results from static loading. Favorable correlation between the two indicates that the proposed technique can be applied to the study of load history effects on the dynamic behavior of polymeric materials.
Source Title: Experimental Mechanics
ISSN: 00144851
Appears in Collections:Staff Publications

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