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Buckling of thin walled cylindrical shell

Submitted by Himayat Ullah on

I am analyzing a steel thin walled cylidrical shell subjected to axial compression against buckling.I performed both eigen value linear and nonlinear buckling analyses using ANSYS.The buckling load is less than the material yield limit and is therefore elastic buckling.

One of my colleague argues that the shell will regain its original shape after the buckling load is removed,as its is elastic buckling.My plea is that the shell has passed the limit point (buckling load) and it is global buckling and no shape recovery will occur after the load removal.

Topology optimization

Submitted by Nestor Rueda Vallejo on
Forums
Ask iMechanica

I'm asking the group about the current and future challenges in topology optimization either from the theoretical point of view as well as the industrial or practical point of view. I think Homogenization is the current de-facto method for practical optimization and I can detect some tendencies like level set methods, mesh less methods, etc at the research level.

What do you think about which is the "predominant" current wave and which will be next wave in topology optimization in the above two fields (theoretical and practical).

Ansys Help

Submitted by maajidchishti on
research
modelling
Composites

Hi All

I have just started my postgraduation in aerospace composites. I am new to FE of composites and required serious help in learning composite modelling. It will great if someone can help me in starting up. If you know any websites or books which have examples which I can go through to learn modelling of composites, please let me know. Thanks for your help.

Regards

Maajid

Notes On Linear Static Analysis & Dynamic Analysis

Submitted by Rahul Katu on
education

Hi friends i am new user and 1 year experienced guy in CAE field in  Pune, India.

    i wants some tips/notes in Linear Static Analysis & non Linear analysis.

 Tips/ Notes about softwares like MSc nastran, Abaqus will be useful for me. So plz tell me how can i obtain them.

What are the differences between "strain hardening" and "work hardening"?

Submitted by Shunlai.Zang on
research
strain hardening
work hardening

I think the concepts from the constitutive theory, but in many papers the researchers seem that they dont differentiate them.  So could you give me an exact explanation about it?  Thank you.

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

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