DelaminationMedical

[4] A. Turon, P.P. Camanho, J. Costa and C.G. Davila: in NASA/TM-2004-213277, VA, USA (2004).

A two-piece can made with DWI (drawn and wall ironed) can forming method invented in the U.S. in 1958. It has been widely used in Japan since 1971. DWI can is made from aluminum or tinplate coil sheet which is drawn into cup shape and then wall-ironed into a can shape with several stages of wall ironing process. It is mainly used for beer and carbonated soft drink (CSD) and for some aerosol products. The can bottom is dome-shaped to withstand internal pressure, and the entire can body surface can be printed. The can forming method takes advantage of the ductility of metal, enabling the sidewall to be as thin as 0.1 mm and the can weight to be lighter than 3-piece cans. Especially in the case of aluminum DWI can, its sidewall can be extremely thin and the total can weight can be very light. Recently, there have been more beverage cans with smaller diameter ends.

delamination中文

[10] O. Sicot, J. Rousseau and D. Hearn: in 16th Int. Conf. Composite Materials, Japan (2007).

DelaminationGeology

[7] J. Li and J.K. Sen: in Proc. 42nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conf, Seattle, WA USA (2000).

[9] J.R. Reeder: in NASA/TM-104210, VA USA (February 1992).

Delaminationsynonym

Delaminationdefect

[1] C.G. Davila, P.P. Camanho and M.F. Moura: in Proc. 42nd AIAA /ASME /ASCE /AHS /ASC Structures, Structural Dynamics and Materials Conf, Seattle USA (April 2001), p.16.

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Compositematerials

The mechanics of interface delamination in CFRP composite laminates is examined using finite element method. For this purpose a 12-ply CFRP composite, with a total thickness of 2.4 mm and anti-symmetric ply sequence of [45/-45/45/0/-45/0/0/45/0/-45/45/-45] is simulated under three-point bend test setup. Each unidirectional composite lamina is treated as an equivalent elastic and orthotropic panel. Interface behavior is defined using damage, linear elastic constitutive model and employed to describe the initiation and progression of delamination during flexural loading. Complementary three-point bend test on CFRP composite specimen is performed at crosshead speed of 2 mm/min. The measured load-deflection response at mid-span location compares well with predicted values. Interface delamination accounts for up to 46.7 % reduction in flexural stiffness from the undamaged state. Delamination initiated at the center mid-span region for interfaces in the compressive laminates while edge delamination started in interfaces with tensile flexural stress in the laminates. Anti-symmetric distribution of the delaminated region is derived from the corresponding anti-symmetric ply sequence in the CFRP composite. The dissipation energy for edge delamination is greater than that for internal center delamination. In addition, delamination failure process in CFRP composite can be described by an exponential rate of fracture energy dissipation under monotonic three-point bend loading.

[2] C.G. Davila and P.P. Camanho: in Proc. 44th AIAA/ASME/ ASCE/AHS Structures, Structural Dynamics, and Materials Conf, Norfolk USA (April 7-10, 2003).

What causesdelaminationin composites

[8] R.G. Campilho, M.F. Moura and J.S. Domingues: Int. J. Solids and Structures Vol. 45 (2007), p.1497.

[6] P.P. Camanho and F. L. Matthews: J. Composite Materials Vol 33 (1999), p.906.

[5] M.L. Benzeggagh and M. Kenane: Composites Science and Technology Vol. 49 (1996), p.439.

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[3] R. Krueger, M.K. Cvitkovich, T.K. O'Brien and P.J. Minguet: J. Composite Material Vol. 34 (2000), p.1263.