Simulation Study of Stress and Deformation Behaviour of Debonded Laminated Structure

National Conference on Processing and Characterization of Materials

Hirwani, C.K.^1 ; Mittal, H.^1 ; Panda, S.K.^1 ; Mahapatra, S.S.^1 ; Mandal, S.K.^1 ; De, A.K.^2

Department of Mechanical Engineering, National Institute of Technology, Rourkela

Odisha, India^1

DRDO Integration Centre, Panagarh

West Bengal, India^2

关键词: ANSYS parametric design language;    Delaminated composites;    First-order-shear deformable;    Strength and deformation characteristics;    Stress and deformation;    Three point bend tests;    Uniformly distributed loadings;    Universal testing machines;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/178/1/012005/pdf
DOI  :  10.1088/1757-899X/178/1/012005

来源: IOP

【 摘 要 】

The bending strength and deformation characteristics of the debonded laminated plate under the uniformly distributed loading (UDL) have been investigated in this research article. For the simulation study, an internally damaged laminated plate structure model has been developed in ANSYS based on the first-order shear deformable kinematic theory via ANSYS parametric design language (APDL) code. The internal debonding within the laminated structure is incorporated using two sub-laminate approach. Further, the convergence (different mesh densities), as well as the validity (comparing the responses with published results) of the present simulation model, have been performed by solving the deflection responses under the influence of transversely loaded layered structure. Also, to show the coherence of the simulation analysis the results are compared with the experimental bending results of the homemade Glass/Epoxy composite with artificial delamination. For the experimental analysis, Glass/Epoxy laminated composite seeded with delamination at the central mid-plane of the laminate is fabricated using an open mould hand lay-up composites fabrication technique. For the computational purpose, the necessary material properties of fabricated composite plate evaluated experimentally via uniaxial tensile test (Universal Testing Machine INSTRON-1195). Further, the bending (three-point bend test) test is conducted with the help of Universal Testing Machine INSTRON-5967. Finally, the effect different geometrical and material parameters (thickness ratio, modular ratio, constraint conditions) and magnitude of the loading on the static deflection and stress behaviour of the delaminated composite plate are investigated thoroughly by solving different kinds of numerical illustrations and discussed in detail.