Sage Journals: Discover world-class research

Abstract

A finite element analysis of composite conoidal shells with delamination damage is carried out to explore the bending characteristics of such shell configurations. Civil and structural engineers have always preferred conoidal shell configuration, which is a ruled and aesthetically pleasant shape. The introduction of laminated composite as the structural material has provided the impetus to explore the different behavioral aspects of composite conoids. The laminated composites are susceptible to delamination damage, occurring due to manufacturing defects or over loadings. Keeping the above points in mind, a finite element analysis using isoparametric shell bending element is presented here, incorporating a multipoint constraint algorithm to take care of compatibility of deformation and equilibrium of forces and moments at the delamination crack front. The formulation is validated through solution of benchmark problems, and a number of delaminated conoidal shells with different boundary conditions are solved for different extents of delamination damage and stacking sequences under uniformly distributed load. The truncation ratio, and hence curvature values, are also varied keeping in mind the industrial requirements of both full and truncated conoids. Results are carefully analyzed to arrive at a set of meaningful conclusions.

Keywords

Conoidal shell delamination finite element analysis laminated composite

Get full access to this article

View all access options for this article.

References

Hadid HA An analytical and experimental investigation into the bending theory of elastic conoidal shells, PhD Dissertation, University of Southampton , 1964.

Hota S. and Chakravorty D. Free vibration of stiffened conoidal shell roofs with cutouts. J Vib Control 2007; 13(3): 221-240.

Das H. and Chakravorty D. Design aids and selection guidelines for composite conoidal shell roofs - a finite element application. J Reinf Plast Compos 2007; 26(17): 1793-1819.

Das H. and Chakravorty D. Natural frequencies and mode shapes of composite conoids with complicated boundary conditions. J Reinf Plast Compos 2008; 27(13): 1397-1415.

Gim CK Plate finite element modeling of laminated plates. Comput Struct 1994; 52(1): 157-168.

Librescu L. and Schmidt R. A general linear theory of laminated composite shells featuring interlaminar bonding imperfections. Int J Solids Struct 2000; 38(19): 3355-3375.

Babael R. , Epstein M. and Lukasiewicz SA Delamination analysis of layered shells. J Compos Mater 2001; 35(21): 1891-1923.

Parhi PK , Bhattacharyya SK and Sinha PK Hygrothermal effects on the dynamic behaviour of multiple delaminated composite plates and shells. J Sound Vib 2001; 248(2): 195-214.

Prusty BG , Satsangi SK and Ray C. First ply failure analysis of laminated panels under transverse loading. J Reinf Plast Compos 2001; 20(8): 671-684.

10.

Wang X. and Dai HL Non-linear solution for locally delaminated buckling near the surface of a laminated cylindrical shell under hydrothermal environment. Int J Press Vessels Pip 2003; 80(4): 243-251.

11.

Huang CH and Lee YJ Static contact crushing of composite laminated shells. Compos Struct 2004; 63(2): 211-217.

12.

Tafreshi A. Efficient modeling of delamination buckling in composite cylindrical shells under axial compression. Compos Struct 2004; 64(3-4): 511-520.

13.

Tafreshi A. Delamination buckling and postbuckling in composite cylindrical shells under external pressure. Thin Wall Struct 2004; 42(10): 1379-1404.

14.

Karmakar A. and Kishimoto K. Transient dynamic response of delaminated composite twisted cylindrical shells subjected to low velocity impact. Key Eng Mater 2005; 297-300:1285-1290.

15.

Tafreshi A. Delamination buckling and postbuckling in composite cylindrical shells under combined axial compression and external pressure . Compos Struct 2006; 72(4): 401-418.

16.

Yang J. , Fu Y. and Wang X. Variational analysis of delamination growth for composite laminated cylindrical shells under circumferential concentrated load. Compos Sci Technol 2007; 67(3-4): 541-550.

17.

Yang J. , Chen D. and Fu Y. Calculation of energy release rate in composite delaminated cylindrical shells under circumferential concentrated dynamic load. Int J Solids Struct 2008; 45(2): 513-527.

18.

Oh J. , Cho M. and Kim J. Buckling analysis of a composite shell with multiple delamination based on a higher order zig-zag theory. Finite Elem Anal Des 2008; 44(11): 675-685.

19.

Acharyya AK , Chakravorty D. and Karmakar A. Bending characteristics of delaminated composite cylindrical shells with complicated boundary conditions. Int J Mater Res, Electron Electr Syst 2008; 1(1): 11-23.

20.

Acharyya AK , Chakravorty D. and Karmakar A. Bending characteristics of delaminated composite cylindrical shells - a finite element approach. J Reinf Plast Compos 2009; 28(8): 965-978.

21.

Acharyya AK , Chakravorty D. and Karmakar A. Natural vibrations of delaminated composite clamped cylindrical shell roofs. Adν Vib Eng - Int J 2009; 8(3): 257-262.

22.

Cook RD , Malkus DS and Plesha ME Concepts and applications of finite element analysis. New York: John Wiley, 1989.

23.

Reddy JN Exact solutions of moderately thick laminated shells. J Eng Mech 1984; 110(5): 794-809.

On the bending characteristics of damaged composite conoidal shells - a finite element approach

Abstract

Keywords

Get full access to this article

References