Failure Prediction in Fiber Metal Laminates for Next Generation Aero Materials

International Conference on Advances in Materials and Manufacturing Applications 2016

Rao, H Jeevan^1 ; Ramulu, Perumalla Janaki^2 ; Vardhan, M Vishnu^1 ; Chandramouli, C.H.^1

Department of Aerospace Engineering, Vardhaman College of Engineering, Shamshabad

501218, India^1

School of Mechancial, Chemical and Materials Engineering, Adama Science and Technology University, P.Box:1888, Adama, Ethiopia^2

关键词: Failure prediction;    Fiber metal laminates;    General loadings;    Maximum relative displacements;    Metal matrices;    Mixed mode delamination;    Progressive delamination;    Single variable;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/149/1/012102/pdf
DOI  :  10.1088/1757-899X/149/1/012102

来源: IOP

【 摘 要 】

In aerospace industry, there is huge demand for low density and low cost materials with better mechanical properties. In this view, there are many researchers developed new materials interms of composites. Similar manner, the present paper also aimed to produce a new approach for cost effective materials of 3D weaved glass fiber metal laminates (FML) with different compositions using a numerical study. A method for the simulation of progressive delamination based on de-cohesion elements has been presented. De-cohesion elements are placed between layers of solid elements that open and shear in response to the loading situation. The onset of damage and the growth of delamination are simulated without previous knowledge about the location, the size, or the direction of propagation of the de-laminations. A softening law for mixed-mode delamination that can be applied to any interaction criterion is also proposed. The constitutive equation proposed uses a single variable, the maximum relative displacement, to track the damage at the interface under general loading conditions. The material properties required to define the element constitutive equation are the inter-laminar fracture toughness's, the penalty stiffness, and the strengths.