Submitted by r.nikhil on Sat, 09/20/2008 - 06:10 research Yield theories YLD91 Can anyone plz send me instructions on how to calculate the coefficients a,b,c,d,h (f,g = 1) for YLD91 and subsequent ones? I have a rough idea, but if someone has explicit instructions .. Shunlai.Zang you can try this software "1stOpt". Hi Nikhil, I have developed some fortran codes of new constitutive models for sheet metal forming processes, which are used to model the plane anisotropy and hardening behavior during strain-path changes(such as Bauschinger effect, transient behavior and permanant softening). In my research, I use "1stOpt" to compute the coefficients of yield functions. I think "1stOpt" is a very powerful and easy mathtools to do this. If you only want to obtain the material parameters, maybe I can help you to compute it. I have identified the material parameters of YLD 2000 by this software. By the way, could you give a short introduction to your idea? If you have any more questions you can contact me by MSN. shunlai.zang [at] hotmail.com Good luck! Shun lai Zang B.Eng, MSc, PhD Lectuer in Material Science and Engineering School of Mechanical Engineering Xi'an Jiaotong University Xi'an ,Shaanxi,China Log in to post comments Mon, 09/22/2008 - 06:07 Permalink Log in to post comments4844 views
Shunlai.Zang you can try this software "1stOpt". Hi Nikhil, I have developed some fortran codes of new constitutive models for sheet metal forming processes, which are used to model the plane anisotropy and hardening behavior during strain-path changes(such as Bauschinger effect, transient behavior and permanant softening). In my research, I use "1stOpt" to compute the coefficients of yield functions. I think "1stOpt" is a very powerful and easy mathtools to do this. If you only want to obtain the material parameters, maybe I can help you to compute it. I have identified the material parameters of YLD 2000 by this software. By the way, could you give a short introduction to your idea? If you have any more questions you can contact me by MSN. shunlai.zang [at] hotmail.com Good luck! Shun lai Zang B.Eng, MSc, PhD Lectuer in Material Science and Engineering School of Mechanical Engineering Xi'an Jiaotong University Xi'an ,Shaanxi,China Log in to post comments Mon, 09/22/2008 - 06:07 Permalink
you can try this software "1stOpt".
Hi Nikhil,
I have developed some fortran codes of new constitutive models for sheet metal forming processes,
which are used to model the plane anisotropy and hardening behavior during strain-path changes(such as
Bauschinger effect, transient behavior and permanant softening). In my research, I use "1stOpt" to
compute the coefficients of yield functions. I think "1stOpt" is a very powerful and easy mathtools to do
this.
If you only want to obtain the material parameters, maybe I can help you to compute it. I have
identified the material parameters of YLD 2000 by this software.
By the way, could you give a short introduction to your idea?
If you have any more questions you can contact me by MSN. shunlai.zang [at] hotmail.com
Good luck!
Shun lai Zang
B.Eng, MSc, PhD
Lectuer in Material Science and Engineering
School of Mechanical Engineering
Xi'an Jiaotong University
Xi'an ,Shaanxi,China