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Impact of fiber metal laminates - literature research

Lisowski B.

Mechanics and Mechanical Engineering

2018

Vol. 22, nr 4

1355--1370

The paper refers the general idea of composite materials especially Fiber Metal Laminates (FMLs) with respect to low-velocity impact incidents. This phenomenon was characterized by basic parameters and energy dissipation mechanisms. Further considerations are matched with analytical procedures with reference to linearized spring-mass models, impact characteristics divided into energy correlations (global flexure, delamination, tensile fracture and petaling absorbed energies) and set of motion second order differential equations. Experimental tests were based on analytical solutions for different types of FML - GLARE type plates and were held in accordance to ASTM standards. The structure model reveals plenty of dependences related to strain rate effect, deflection represented by the correlations among plate and intender deformation, separate flexure characteristics for aluminium and composite, contact definition based on intender end-radius shape stress analysis supported by FSDT, von Karman strains as well as CLT. Failure criteria were conformed to layers specifications with respect to von Misses stress-strain criterion for aluminium matched with Tsai-Hill or Puck criterion for unidirectional laminate. At the final stage numerical simulation were made in FEM programs such as ABAQUS and ANSYS. Future prospects were based on the experiments held over 3D-fiberglass (3DFG) FMLs with magnesium alloy layers which covers more favorable mechanical properties than FMLs.

Numerical Simulation of Low Velocity Impact Analysis of Fiber Metal Laminates

Balkumar K., Iyer A. V., Ramasubramanian A., Devarajan K., Marimuthu P. K.

Mechanics and Mechanical Engineering

2016

Vol. 20, nr 4

515--530

A Fiber Metal Laminate (FML) consists of a laminate of several thin metal layers bonded with fiber–reinforced layers of composite materials. In this paper, the response of a fiber metal laminate is analysed on the basis of the residual velocity of the impactor. With the help of Design of Experiments (DOE) the data sets are generated and the residual velocity of the impactor was obtained by using Finite Element Analysis (FEA) software ABAQUS/Explicit. The FEA results are compared with experimental results available in the literature. Analysis of Variance (ANOVA) is used to understand the influence of process parameters on the response of FMLs. Results show that impactor geometry and thickness of the FML plate were the significant process parameters related to the response of low velocity impact analysis of FML and fiber configurations were found to be insignificant with regard to low velocity impact analysis performance. Finally the results show that aluminium based Aramid fibers (ARALL) and aluminium based glass fibers (GLARE) have higher impact strength when compared to other kinds of FMLs such as aluminium based carbon fibers (CARALL). Stress distribution in glass epoxy based FMLs are also studied.