Investigation of Chain Meshwork: Protective Effects and Applications
The protection of human life and the reduction of harm caused by terrorist attacks or natural catastrophe has a high priority in the design of buildings and means of transportation, for example armoured vehicles. In addition to these safety and security aspects, are considerations of sustainability.
This paper contains two different protection types based on the usage of chain meshwork, the pure and the hybrid type. The pure metallic chain meshwork was compared in different experimental tests regarding impact detonation loads. For example, if the application of chain meshwork is used as an ordinary curtain combined with a regular window, two major effects are obtained. The first effect is the reduction of the blasting wave and the second more important effect is the shiver protection. In this case, the chain meshwork avoids the loosening and the following burst of the window glass, resulting in an increase in the protection level. On the other hand, a newly developed hybrid composite shows outstanding impact results, as proven by several tests by the German Federal Armed Forces. According to the testing results, an increase of impact strength up to 60% can be achieved by reinforcing common carbon fibre reinforced plastics (CFRP) with a metallic chain mesh. The fibre composite is made out of carbon fibres, unidirectional with polyetheretherketone matrix or woven with epoxy matrix. The scope of this work is the general investigation of the impact behaviour of pure meshwork and fibre composites reinforced with metallic chain mesh, especially in the field of low and high velocity impact. Besides the first production of samples of the new material combination, experimental investigations are carried out on coupon testing level. These include 3-point-bending tests, Charpy-Impact tests and ice impact tests at high velocity on a custom designed gas gun as well as comparison of blast and sliver behaviour. Testing should be accompanied and should work as the validation basement by looking at the possibilities of numerical simulation of the general and hybrid material, so further complex scenarios can be realized and the forecast of effects are visible.
KeywordsFibre Composite Blast Wave Carbon Capture Epoxy Matrix Carbon Fibre Reinforce Plastic
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