Research On Mechanical Properties Of Aluminum Foam Sandwich Structure

With the development of technology, people’s demand for the excellentproperties of the material is becoming higher and higher. Due to the advantagesof high specific strength, high specific modulus, absorbing energy, reducingnoise, the light sandwich structure has been widely used in many fields, such asaerospace, ships, submarine, cars. This thesis is based on the use of the shipcomposite material, researching the mechanical properties of aluminum foam andhybrid fiber reinforced laminated plates separately, then we researched thebuckling behavior of the sandwich structure. The main contents are given asfollows:It is difficult to build a model due to its complex structure, considering this,we proposed a new method to construct the model of aluminum foam with therelative density of0.17. In this method, we combined CT scanning technology,reverse engineering software Rapidform, the finite element software Hypermeshand ABAQUS together, and finally we construct a perfect mesh model; By usingthe mesh model, we simulate the mechanical properties of the aluminum foamwith the relative of0.17, which include the property of compression, tensile andshear，the result of simulation matches the experiments well; we have alsopredicted the mechanical property of the model in aspect of compression,tensile and shear with different base materials.Finite element method is used to simulate the quasi-static tensile strength ofthe hybrid fiber laminated plate and analyze the influence of the angle oflayers and carbon fiber content.A crushable foam is defined in terms of the simulation data. By using thiskind of material as the core, together with hybrid fiber reinforced laminatedplates, we obtain the sandwich structure and we also analyzed the bucklingbehavior of the structure.