Static deflection prediction of damaged glass fiber‐reinforced metal laminated composite and experimental validation

Abstract This study examines the influence of damage on the stiffness characteristics of synthetic fiber (Glass)‐reinforced metal laminated composite panels through static deflection analysis. The fiber‐metal laminate (FML) structural panel deflections are obtained computationally via a mathematical model using third‐order kinematics in the framework of equivalent single‐layer theory. The deflection values are obtained numerically with the help of finite element steps. The solution consistencies are verified by a convergence test and extended to perform the validation. Additionally, the numerical results are compared with the in‐house experimental data of FML bending deflection values considering the experimental properties and influence of damage. The maximum deviation in the intact deflection response was −4.27%, while the deflection response for crack damage showed a deviation of −0.57%. Again, the model is engaged in obtaining the results by varying different geometry‐dependent design parameters, including the damage data. The spherical geometry with a pre‐damaged structure demonstrates better deformation resistance under external loading. The thickness ratio ( L/h ) and angle layup fiber scheme show a higher deflection response. Highlights A higher‐order FE model is delved to compute the deflections of damaged FML. The model validity is verified with in‐house experimental values. The inference of parameters on the deflection values are computed numerically. The understandings of significant parameters are discussed in detail.