Flexural response of fiber-metal laminate face-sheet/corrugated core sandwich beams

The purpose of this study is to determine the flexural response of corrugated Fiber-Metal Laminates (FMLs) through experimental tests and structural optimization of FML sandwich panels with corrugated cores. In-plane tensile tests are performed on the constituent layers, made of E-glass woven fiber and aluminum 3105 for both flat and corrugated specimens. Moreover, the novel corrugated FMLs were manufactured and put through the tensile test and the force-displacement curve was divided into three phases and discussed. A three-point bending test is used to evaluate out-of-plane shear modulus of sandwich panels with the corrugated core. After that, finite element analysis is used to simulate the tests of corrugated samples. The numerical force-displacement curve is derived from numerical analysis and verified by experimental results. To optimize the geometrical and material parameters of corrugated FML, equivalent properties are derived analytically by developing a code that is validated by numerical and experimental results. A multi-objective optimization problem is implemented by formulating two objective structural functions in addition to mass. Also, the relevant constraints were introduced to specify the solution space. Finally, the compromise point is then estimated using the LINMAP method. [GRAPHICS] .

Automated summary

The purpose of this study is to determine the flexural response of corrugated Fiber-Metal Laminates (FMLs) through experimental tests and structural optimization. The study successfully validated the derived equivalent properties and found a compromise point through multi-objective optimization.