Behaviour Of Composite Reinforcements Research Articles

Study of bending behaviour of composite reinforcements

In shaping of composite reinforcements, tensile stresses are the major stresses, while in plane shear strains are the major strains. However the knowledge of the bending behaviour would give more precisely simulation of forming especially for stiffer and thicker textiles. A new cantilever test using optical measurement has been developed to identify non elastic behaviour by taking into account the history of the strains. Associated to the test, an inverse identification method has been developed. Based on the simulation of the test using finite element analysis, the method enables to test the validity of a postulated bending model and to optimize the values of its parameters if validated. An hysteretic bending model has been tested for a carbon Non Crimp Fabric reinforcement to show the advantage of the complete approach.

Evaluation of Bearing Capacity Improvement Using Composite Grids

Abstract Recently, composite reinforcements in which combinations of materials and material forms such as strips, grids, and strips and anchors, depending on requirements, have proven to be effective in various ground improvement applications. Composite geogrids studied in this paper belong to the category of composite reinforcements and are useful for bearing capacity improvement. The paper presents evaluation of results of bearing capacity tests conducted on a composite geogrid, made of composite reinforcement consisting of steel and cement mortar. The study shows that the behavior of composite reinforcements follows the general trends observed in the case of conventional geogrids, with reference to the depth of first layer below the footing, number of layers of reinforcement, and vertical spacing of the reinforcement. Results show that the performance is comparable to that of a conventional polymer geogrid.