Modelling of Fracture Toughness in Steel Laminates with a Finite Element Method

Mehmet ŞİMŞİR; Tayfur ÖZTÜRK; Mustafa DORUK

Makale detayları

Modelling of Fracture Toughness in Steel Laminates with a Finite Element Method

Yazarlar:

Mehmet ŞİMŞİR | Tayfur ÖZTÜRK | Mustafa DORUK

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Engineering and Environmental Sciences 2005 Vol.29 Issue 1, pp.41-50

Belge Tipi:

Makale

Yayın Tarihi:

12/2004

Belge Dili:

Türkçe

Document ID (Org No.):

2000745069

Sıklık:

Üç Yıllık

eISSN:

1303-6157

pISSN:

1300-0160

Özet:

 

The fracture toughness of laminates in which both phases are  ductile is modeled with finite element analyses in terms of JIC.   The models employed were an exact analogue of compact tension test  pieces loaded longitudinally at pinholes, transverse to the crack  plane.  This study focused on the verification of the model in  monolithic samples, the simplest form of which was 2-dimensional  (plane strain), and the most elaborate version of which was a 3-D  layered structure.  Adaptation of the model to laminates showed that  it is possible to predict delamination if the individual layers are  glued together with a certain interfacial strength.  The fracture  toughness of laminates, JIC, is predicted with and without  delamination with the use of a fracture criterion based on a critical  value of load line displacement.  This critical value derived from the  experiment, and the fracture toughness of steel laminates with layer  properties of low-C and medium-C steels are predicted successfully for  2 volume fractions.  It is further found that the fracture criterion,  which was based on a critical value of LLD, can well be based on a  critical value of plastic zone size.  This has the advantage that the  critical value of plastic zone size and hence the J integral can be  predicted with FEM analysis.

 

The fracture toughness of laminates in which both phases are  ductile is modeled with finite element analyses in terms of JIC.   The models employed were an exact analogue of compact tension test  pieces loaded longitudinally at pinholes, transverse to the crack  plane.  This study focused on the verification of the model in  monolithic samples, the simplest form of which was 2-dimensional  (plane strain), and the most elaborate version of which was a 3-D  layered structure.  Adaptation of the model to laminates showed that  it is possible to predict delamination if the individual layers are  glued together with a certain interfacial strength.  The fracture  toughness of laminates, JIC, is predicted with and without  delamination with the use of a fracture criterion based on a critical  value of load line displacement.  This critical value derived from the  experiment, and the fracture toughness of steel laminates with layer  properties of low-C and medium-C steels are predicted successfully for  2 volume fractions.  It is further found that the fracture criterion,  which was based on a critical value of LLD, can well be based on a  critical value of plastic zone size.  This has the advantage that the  critical value of plastic zone size and hence the J integral can be  predicted with FEM analysis.

Makale detayları

Modelling of Fracture Toughness in Steel Laminates with a Finite Element Method

Yazarlar: Mehmet ŞİMŞİR | Tayfur ÖZTÜRK | Mustafa DORUK

Yayıncı: TUBITAK

Dergi: Turkish Journal of Engineering and Environmental Sciences 2005 Vol.29 Issue 1, pp.41-50

Belge Tipi: Makale

Yayın Tarihi: 12/2004

Belge Dili: Türkçe

Document ID (Org No.): 2000745069

Sıklık: Üç Yıllık

eISSN: 1303-6157

pISSN: 1300-0160

Sayı

Yazarlar:

Mehmet ŞİMŞİR | Tayfur ÖZTÜRK | Mustafa DORUK

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Engineering and Environmental Sciences 2005 Vol.29 Issue 1, pp.41-50

Belge Tipi:

Makale

Yayın Tarihi:

12/2004

Belge Dili:

Türkçe

Document ID (Org No.):

2000745069

Sıklık:

Üç Yıllık

eISSN:

1303-6157

pISSN:

1300-0160