NMR imaging of technical SBR vulcanizates under dynamic mechanical load

1997 ◽  
Vol 198 (9) ◽  
pp. 2729-2742 ◽  
Author(s):  
Daniela Hauck ◽  
Peter Blümler ◽  
Bernhard Blümich
Keyword(s):  
Mechanical Load ◽  
Nmr Imaging ◽  
Dynamic Mechanical

Dynamic mechanical load emulation test facility to evaluate the performance of AC inverters

2000 ◽  
Vol 14 (1) ◽  
pp. 21-28 ◽  
Author(s):  
C.R. Hewson ◽  
P.W. Wheeler ◽  
G.M. Asher ◽  
M. Sumner
Keyword(s):  
Mechanical Load ◽  
Test Facility ◽  
Dynamic Mechanical

scholarly journals Optimizing Viscoelastic Properties of Rubber Compounds for Ballistic Applications

2020 ◽  
Vol 10 (21) ◽  
pp. 7840
Author(s):  
Janis Karl ◽  
Franziska Kirsch ◽  
Norbert Faderl ◽  
Leonhard Perko ◽  
Teresa Fras
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Mechanical Stress ◽  
Mechanical Load ◽  
Superposition Principle ◽  
Dynamic Mechanical Properties ◽  
Mechanical Analysis ◽  
Ballistic Impact ◽  
Dynamic Mechanical

Using interlayers of rubber adds a positive effect to the synergy of disruptor–absorber armors. Emerging from its viscoelasticity the material is able to transform mechanical stress into heat. The dynamic mechanical properties of elastomers depend on both ambient temperature and frequency of an applied mechanical load. The damping shows a maximum in the glass transition area. If the frequency of the glass transition is in the magnitude of the mechanical stress rate applied by ballistic impact, the elastomer will undergo the transition and thus show maximized damping. An ideal material for ballistic protection against small calibers is developed by making use of dynamic mechanical analysis and the time–temperature superposition principle. The material is later analyzed by ballistic experiments and compared to other nonideal rubbers with regard to glass transition temperature, hardness and damping. It is shown that by choosing a material correctly with certain glass transition temperature and hardness, the ballistic properties of a steel–rubber–aluminum armor can be enhanced. The chosen material (butyl rubber) with a hardness of 50 °ShA is able to enhance energy absorption during ballistic impact by around 8%, which is twice as good as other rubber with non-optimized properties.

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