كليدواژه :
Carbon/epoxy composite tubes , Axial compression , Circular Aopper Tubes , Silicon sealant , Energy Absorption
چكيده لاتين :
This paper investigates the axial compression process of the multi-layered tubes with the circular crosss-section under the axial loading in the quasi-static condition by the experimental methods. The specimens were prepared in five different groups: empty carbon/epoxy composite tubes, empty copper tubes, silicon sealant filled composite tubes, copper tubes comprised of filled silicon sealant carbon/epoxy composite tubes with also silicon sealant filler in between and copper tubes filled by
empty composite tubes with silicon sealant filler in between. For each test, diagrams of the axial loaddisplacement and absorbed energy-displacement were sketched and also, the specific absorbed energy
by each specimen was measured. The experiments show that filling the copper tube by the composite
tubes and also, filling the carbon/epoxy composite tubes by the silicon sealant increase the
instantaneous axial load and therefore, the energy absorption capability of the structure. Then, by
comparing the experimental measurements in veiwpoints of energy absorption capacity and specific
absorbed energy, an optimum sample is introduced. Furthermore, the effects of geometrical
characteristics of the composite and copper tubes such as the tube diameter and also, the different
filling conditions are investigated, based on the axial compression tests. The experiments show that the
absorbed energy of the circular copper tubes that were filled by the carbon/epoxy compsoite tubes is
higher than the alone copper tubes. Also, it was found that the copper tubes has the less absorbed
energy per unit of mass, comparing with the empty carbon/epoxy composite tubes and also, the filled
composite tubes by the silicon sealant.
