Process of shock attenuation inside a hollow glass microsphere/polymeric composite media

Ribeiro, J.; Plaksin, I.; Campos, J.; Mendes, R.; Go´is, J.
April 2000
AIP Conference Proceedings;2000, Vol. 505 Issue 1, p559
Academic Journal
The shock wave (SW) structure and its attenuation process, in the pressure range of 0.1 to 5 GPa inside a composite material (CM), is presented. The CM is based in a thermoset resin (TR) of polyester having, as inert filler, hollow glass micro-spheres (HGM) enclosing an inert gas. This kind of CM, known as syntactic foam, presents very interesting properties for shock absorption applications. The used HGM have density of 256 kg/m[SUP3], a wall thickness of μm and a mean gas cavity diameter of 78 μm. They are dispersed inside the TR, in three different mass ratios (5/100, 10/100 and 25/100). An explosive plane wave generator has been used for sample shock loading. A thin multifibre optical strip, connected to an electronic streak camera, allowed the measurement of the SW velocity, with spatial resolution less than 250 μm and the observation, in real time, with a nanosecond temporal resolution, of the shock front irregularities. The results allow the establishment of the pressure-shock velocity evolutions and the evaluation of the shock attenuation, as a function of the HGM/TR mass ratio.


Related Articles

  • CONSIDERATIONS ON THE NON-LINEAR MODELLING OF THE DYNAMICS OF THE VIBRATION AND SHOCK ISOLATORS MADE FROM COMPOSITE NEOPRENE. Bratu, Polidor; Leopa, Adrian // Annals of the University Dunarea de Jos of Galati: Fascicle XIV,;2010, Vol. 14, p13 

    This study presents the results of theoretical and experimental researches and numerical modeling for some composite material structures of neoprene used to manufacture the viscous-elastic supports of the technological equipment with dynamic loads. This kind of equipment, which has a high level...

  • Shock Absorber using Hydraulic System and Shape Memory Alloys. Ke ZHANG; Zhiping TANG // Applied Mechanics & Materials;2014, Issue 624, p298 

    A new type of shock absorber was designed. The shape memory alloy (SMA) bars were used as the kernel components for energy dissipation and restoration in the stress mode of pure tension. Their initial deformation was enlarged by the hydraulic system with two pistons of different sizes. In this...

  • Utilization of Superplastic Materials as a Shock Absorber and a Shielding Device against High Speed Fragments. Zaid, Adnan I. O.; Abu-Mallouh, Riyad M.; Al-Matari, Mustafa A. A. // Key Engineering Materials;2016, Vol. 689, p114 

    In this paper, some of the failures and fractures caused by stress waves and shock waves resulting from impact and hypervelocity impact phenomena are presented and discussed. Furthermore, different designed and tested systems to protect the persons and the structural engineering members are also...

  • Shock-wave compression and release of aluminum/ceramic composites. Johnson, J. N.; Hixson, R. S.; Gray, G. T. // Journal of Applied Physics;11/15/1994, Vol. 76 Issue 10, p5706 

    Deals with a study which examined composite materials consisting of ceramic particles embedded in an aluminum matrix under conditions of shock-wave compression and release. Materials; Experimental results; Effects of randomization; Discussion and conclusions.

  • Structured shock waves and the fourth-power law. Grady, Dennis E. // Journal of Applied Physics;Jan2010, Vol. 107 Issue 1, p013506-1 

    A fourth-power law relating the stress jump through a steady structured shock wave and the maximum strain rate within the shock wave has received recognition as a unifying relation over a sensibly wide range of materials and shock compression amplitudes. Less widely recognized is the...

  • LASER INDUCED SHOCK WAVES FOR COMPOSITES ADHESIVE BOND TESTING. Gu, Z.; Perton, M.; Kruger, S. E.; Blouin, A.; Lévesque, D.; Monchalin, J.-P.; Johnston, A.; Boustie, M.; Berthe, L.; Arrigoni, M. // AIP Conference Proceedings;2/22/2010, Vol. 1211 Issue 1, p295 

    A method based on shock waves produced by a pulsed laser is applied to the evaluation of bond strength of composite plates joined by an adhesive layer. A laser shock wave can cause a delamination when it propagates through the adhesive/plate interface. Different laser pulse energies can be used...

  • HIGH-PRESSURE RANGE SHOCK WAVE DATA FOR SYNTACTIC FOAMS. Ribeiro, J.; Mendes, R.; Plaksin, I.; Campos, J.; Capela, C. // AIP Conference Proceedings;12/28/2009, Vol. 1195 Issue 1, p1265 

    Syntactic foams [SF] are a porous composite material resulting from the mixture of Hollow Glass Micro Spheres [HGMS] with a polymeric binder. Beyond a set of technological advantages over the polymer considered alone, SF present as an essential feature the possibility to control in wide limits...

  • Testing and simulation of a polypropylene-glass fibre reinforced woven composite on a wide range of strain-rates. Martin, A.; Othman, R.; Rozycki, P. // EPJ Web of Conferences;2012, Issue 26, Special section p1 

    Medium costs composites materials are good candidates to develop lightweight and economical shock absorber for the next generation of cars. In this context we are interested in characterising and modelling of Twintex a long glass fiber reinforced polypropylene. Testing will be carried with a...

  • How to select shock absorbers.  // Machine Design;08/21/97, Vol. 69 Issue 16, p114 

    Presents information on shock absorbers. How shock absorbers prevents shock damages to equipment from becoming a serious problem; How shock absorbers work; Rules which help size an industrial shock absorber for a horizontal application. INSET: Composite bearings..


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics