چكيده به لاتين
In today’s world, due to significant advances in various industries such as the automotive, air, marine industry and etc. there is an increasing demand for engineering materials with lower weight and improved mechanical properties, which reduces fuel consumption and thus reduces pollution.
Among the composite materials designed for this purpose, Multi-layer materials have good properties for satisfying the above mentioned needs. Since the three-layered composites of metal / polymer / metal Simultaneously with the light-weight, has good mechanical properties and good formability and limited research has been done in designing their forming process, for this purpose, in this study, formability of the Aluminum / Polyethylene / Aluminum sandwich sheets is experimentally and numerically investigated. For this object, firstly, three-layered sheets of aluminum and polymer core was made in laboratory conditions, then uniaxial tensile tests were made on the raw material and three-layered composite sheets. To investigation of the sandwich sheet's formability, Nakazima test was performed and the effect of layers layout on the metal sandwich sheet forming was investigated. After confirmation, the finite element model was observed to show that the strain outputs in the finite element method exhibited good agreement with experimental results. It was also proved that the layering of layers inside the metal molding plays an important role in the formability of the sandwich sheets.
Keywords: Three-layer sheet; Sandwich composite; Forming limit diagram; Finite Element Method; Nakazima test.
