Modeling of Large Simple Shear Using a Viscoplastic Overstress Model and Classical Plasticity Model with Different Objective Stress Rates

Özgen Ü. ÇOLAK

Makale detayları

Modeling of Large Simple Shear Using a Viscoplastic Overstress Model and Classical Plasticity Model with Different Objective Stress Rates

Yazarlar:

Özgen Ü. ÇOLAK

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Engineering and Environmental Sciences 2003 Vol.27 Issue 2, pp.95-106

Belge Tipi:

Makale

Yayın Tarihi:

1/2003

Belge Dili:

Türkçe

Document ID (Org No.):

2000745141

Sıklık:

Üç Yıllık

eISSN:

1303-6157

pISSN:

1300-0160

Özet:

 

Large simple shear deformation, which is usually used to  test the applicability of various models, is studied by applying the  classical plasticity model and the viscoplasticity theory based on  overstress (VBO) with the logarithmic stress rate.  Hypo-elastic,  elastic-perfectly plastic, elastic-plastic linear kinematic and  isotropic hardening models are employed.  In addition to the  logarithmic rate, the influences of the convected Truesdell and  co-rotational Jaumann and Green-Naghdi rates on stress-strain behavior  in simple shear are investigated.  It is observed that unlike the  Jaumann rate the logarithmic rate does not exhibit any oscillatory  response.  The responses of the logarithmic rate to every type of  model discussed here are acceptable except the elastic-perfectly  plastic case.  The finite viscoplasticity theory based on overstress,  which has been developed by Krempl and co-workers, with zero isotropic  stress rate and non-zero hardening modulus and elastic-plastic  kinematic hardening model give the same results at a rate of  10-51/s.  It is shown that elastic-perfectly plastic, and  elastic-plastic kinematic hardening can be modeled with FVBO.

 

Large simple shear deformation, which is usually used to  test the applicability of various models, is studied by applying the  classical plasticity model and the viscoplasticity theory based on  overstress (VBO) with the logarithmic stress rate.  Hypo-elastic,  elastic-perfectly plastic, elastic-plastic linear kinematic and  isotropic hardening models are employed.  In addition to the  logarithmic rate, the influences of the convected Truesdell and  co-rotational Jaumann and Green-Naghdi rates on stress-strain behavior  in simple shear are investigated.  It is observed that unlike the  Jaumann rate the logarithmic rate does not exhibit any oscillatory  response.  The responses of the logarithmic rate to every type of  model discussed here are acceptable except the elastic-perfectly  plastic case.  The finite viscoplasticity theory based on overstress,  which has been developed by Krempl and co-workers, with zero isotropic  stress rate and non-zero hardening modulus and elastic-plastic  kinematic hardening model give the same results at a rate of  10-51/s.  It is shown that elastic-perfectly plastic, and  elastic-plastic kinematic hardening can be modeled with FVBO.

Makale detayları

Modeling of Large Simple Shear Using a Viscoplastic Overstress Model and Classical Plasticity Model with Different Objective Stress Rates

Yazarlar: Özgen Ü. ÇOLAK

Yayıncı: TUBITAK

Dergi: Turkish Journal of Engineering and Environmental Sciences 2003 Vol.27 Issue 2, pp.95-106

Belge Tipi: Makale

Yayın Tarihi: 1/2003

Belge Dili: Türkçe

Document ID (Org No.): 2000745141

Sıklık: Üç Yıllık

eISSN: 1303-6157

pISSN: 1300-0160

Sayı

Yazarlar:

Özgen Ü. ÇOLAK

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Engineering and Environmental Sciences 2003 Vol.27 Issue 2, pp.95-106

Belge Tipi:

Makale

Yayın Tarihi:

1/2003

Belge Dili:

Türkçe

Document ID (Org No.):

2000745141

Sıklık:

Üç Yıllık

eISSN:

1303-6157

pISSN:

1300-0160