education

Significance of J1 and J2

Submitted by Ashar Sultan on Tue, 12/11/2007 - 03:37

Forums

Choose a channel featured in the header of iMechanica

Dear members,

I need some information about the implication or significance of J1 and J2 in granular materials not mathematical represantation which I have.Your feedback will be highly appreciated.Thanks in advance.

P = Mean stress or Hydrostatic stress = (σ₁₁+ σ₂₂+ σ₃₃)/3

J₁ = -3 * p

GRE Verbal, how much does it count?

Submitted by Temesgen Markos on Mon, 12/10/2007 - 15:55

education

I am in the process of applying for a PhD in computational solid mechanics in the US and I am about to take the GRE. Well I have been kind of busy at my work and didn't really get time to study the word list.

My question is, how much weight does the verbal part have in admission/fellowship/assistantship decisions? If I have really good GPA's and research experience with enthusiastic refrees, can I still make it with medicore results on the verbal part?

creep in tubes abaqus

Submitted by angaraj on Mon, 12/10/2007 - 07:57

education

creep of tubes

I am a abaqus beginer, I want to know how to analyse creep of tubular component in abaqus. If you have any material regarding this kindly mail me. I need it for my project work.

ES 240 (Fall 2007) Homework 37-40

Submitted by Nanshu Lu on Sat, 12/08/2007 - 21:53

This is the last problem set this semester. It is due on Friday, Dec. 14, 2007.

ES 240 (Fall 2007) Lecture Notes - Plasticity

Submitted by Nanshu Lu on Sat, 12/08/2007 - 21:51

See attachment for ES 240 lecture notes on plasticity.

Complex analysis on Wikipedia

Submitted by Zhigang Suo on Sat, 12/08/2007 - 21:14

I'm teaching Applied Mathematics 105a this semester. The main content of the course is complex analysis. The course is taken mainly by undergraduate students in Engineering, Physics, and Applied Mathematics. There are about 70 people in the class, which makes it the largest class I have taught in the last 10 years. I have never taught a course on complex analysis before, but have used complex analysis in my research, and have taught the method of complex variables in my graduate course on elasticity.

regarding upper bound analysis

Submitted by alex jackson on Sun, 12/02/2007 - 09:02

Forums

Ask iMechanica

Choose a channel featured in the header of iMechanica

education

please help me regarding UPPER BOUND ANALYSIS for KINEMATICALLY ADMISSIBLE SOLUTION.AND how can i ploat the hodograph for any kind of indentation..try to help me with the figures..as soon as possible guys.

Plasticity

Submitted by Ray_Lau on Sat, 12/01/2007 - 00:35

Forums

Ask iMechanica

Choose a channel featured in the header of iMechanica

education

Free Tags

Plasticity

von mises

Dear all,

Do you have any reference about the theory of plasticity? Especially about flow theory and von Mises yield criterion?

For example if I have an effective stress - plastic strain relationship, and I after yielding, I increase my strain again, how can I obtain the increment of the plastic strain and the stress deviator tensor?

Thanks a lot.

Best,

Ray