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Kevlar KM2: Wikis


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Kevlar® KM2® is a synthetic para-aramid fibre produced by DuPont. The fibre is an evolution of the original Kevlar fibre. The following quotes summarise Kevlar® KM2's® properties.

"DuPont created Kevlar® KM2® to achieve the performance goals defined by casualty reduction testing. Today it is used extensively for fragmentation protection in the U.S. military. Helmets and vests made with Kevlar® KM2® provide enhanced bullet and fragmentation resistance while remaining comfortable and breathable in the most inhospitable climates.

Excellent thermal stability at temperature extremes, water repellency, chemical stability and resistance to petroleum products have made Kevlar® KM2® an indispensable asset to the military personnel who use it every day."[1]

"Kevlar® KM2 fiber is a transversely isotropic material. Its tensile stress-strain response in the axial direction is linear and elastic until failure. However, the overall deformation in the transverse directions is nonlinear and nonelastic, although it can be treated linearly and elastically in infinitesimal strain range. For a linear, elastic, and transversely isotropic material, five material constants are needed to describe its stress-strain response. In this paper, stress-strain behavior obtained from experiments on a single Kevlar KM2 fiber are presented and discussed. The effects of loading rate and the influence of axial loading on transverse and transverse loading on axial stress-strain responses are also discussed."[2]


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  2. ^ Mechanical Properties of Kevlar® KM2 Single Fibre, J. Eng Materials Technology, April 2005, Volume 127, Issue 2, pp.197-204



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