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Study on Finite Element Modeling Aspects of Delaminated Honeycomb Sandwich Beams


Affiliations
1 Structural Engineering Entity, Vikram Sarabhai Space Centre, Trivandrum, India
2 Applied Mechanics Department, Indian Institute of Technology, Chennai, India
3 Mechanical Engineering Department, Indian Institute of Technology, Chennai, India
     

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The simulation of damaged honeycomb sandwich structures is an important aspect in the structural health monitoring and prognosis. This paper studies finite element modeling aspects of delaminated honeycomb sandwich structure. The models proposed are 3-D model of the honeycomb sandwich construction using isotropic shell elements and a layered shell element model, both with contact elements defined in between the delaminated skin and core. Case study is conducted on damaged and undamaged metallic sandwich beam with 3-D shell element modeling and layered element modelling. The models are validated using three point bending test of damaged and undamaged beams. Results are compared with the experimental, theoretical and finite element results. The results show that the layered element modeling simulates the stiffness and gives the similar results to that of 3D model in the global responses and is computationally efficient.

Keywords

Honeycomb Sandwich Structure, Delamination, Finite Element Modelling, Three Point Bending Test.
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  • Study on Finite Element Modeling Aspects of Delaminated Honeycomb Sandwich Beams

Abstract Views: 321  |  PDF Views: 2

Authors

K. R. Pradeep
Structural Engineering Entity, Vikram Sarabhai Space Centre, Trivandrum, India
S. M. Srinivasan
Applied Mechanics Department, Indian Institute of Technology, Chennai, India
B. Nageswara Rao
Structural Engineering Entity, Vikram Sarabhai Space Centre, Trivandrum, India
K. Balasubramaniam
Mechanical Engineering Department, Indian Institute of Technology, Chennai, India

Abstract


The simulation of damaged honeycomb sandwich structures is an important aspect in the structural health monitoring and prognosis. This paper studies finite element modeling aspects of delaminated honeycomb sandwich structure. The models proposed are 3-D model of the honeycomb sandwich construction using isotropic shell elements and a layered shell element model, both with contact elements defined in between the delaminated skin and core. Case study is conducted on damaged and undamaged metallic sandwich beam with 3-D shell element modeling and layered element modelling. The models are validated using three point bending test of damaged and undamaged beams. Results are compared with the experimental, theoretical and finite element results. The results show that the layered element modeling simulates the stiffness and gives the similar results to that of 3D model in the global responses and is computationally efficient.

Keywords


Honeycomb Sandwich Structure, Delamination, Finite Element Modelling, Three Point Bending Test.



DOI: https://doi.org/10.4273/ijvss.4.3.07