An experimental method of measuring the confined compression strength of high-performance concretes to analyse their ballistic behaviour

Abstract

Abstract. The test known as "quasi-oedometric compression" consists of the compression of a cylindrical specimen confined in a thick vessel. In this work, an original methodology is proposed to deduce the radial stress and strain within the specimen using hoop strains measured on the external surface of the vessel, taking into account its elasto-plastic deformation. On one hand the spherical and deviatoric behaviours of two concretes are deduced. On the other hand, their ballistic behaviour is analysed using impact tests. These experiments are simulated numerically by the plasticity model of Krieg, Swenson and Taylor, and the features of the model are identified by the previous confined compression tests. The capacity of the model to describe the ballistic behaviour of such materials is shown in a comparison of the numerical simulations with the ballistic tests.

Relationship between static bending and compressive behaviour of particle-reinforced cement composites

“…Since in this study the mortars contained particles of up to 10 mm, we used cylindri cal specimens of 30 mm diameter and a height of 40 mm for the compression tests. Those dimensions give a height/diameter aspect ratio of 1.33, close to value used in previous works for compression tests of cement materials [10,37,38].…”

“…This goal may be reached if a composite material made with a polymeric ma trix and containing a high density of ceramic particles is used as front layer material [6 9]. In this work, cement composites were designed with a similar perspective, by incorporating high strength particles to improve the impact resistance of concrete materials [10] that present low cost and the ease of moulding.…”

Characterization of Confined Intact and Damaged Borosilicate Glass

“…Chen and Luo 8 characterized intact and damaged ceramics under low confinement pressures at high strain rates. A confinement sleeve was also used by Forquin et al , 9 in combination with numerical simulations, to characterize concrete at high pressures. Other work, all with ceramics are described in Chen and Ravichandran, 10 Chen and Luo, 11 Luo et al , 12 and Dannemann et al 13 In general, the above references confine the specimens at low to moderate pressures (100–300 MPa).…”

Implementation and validation of a strain rate dependent model for carbon foam

“…This property, which is generically common for the foams too, justifies the measured ballistic performances. It is worth to notice that the approach of considering the compressive confined behaviour of similar materials involved in ballistic impact has been already used [6]. Finite element model of the ballistic experiments presented in the present work.…”