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hi all!

i am a new user of abaqus. i am trying a simple problem of a plate. the plate is made of composite material (orthotropic). i give all the properties correctly. but after submitting the job i get an error that 'laminate type- can be used with plane stress elemnts only'. how could i rectify this? can anyone tell me how to model a plane stress problem in abaqus? what is the significance of plane stress/strain thickness ratio. 

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Here are the chapter names:

1) Prototypes of the theory of elasticity and viscoelasticity

2) Tensor analysis

3) Stress tensor

4) Analysis of strain

5) Conservation Laws

6) Elastic and plastic behavior of materials

7) Linear elasticity

8) Solutions of problems in elasticity by potentials

9) Two-dimensional problems in elasticity

10) Variational Calculus, energy theorems, saint-venant's principle

11) Hamilton's principle, wave propagation, applications of generalized coordinates 

Part 2 of Plane Elasticity notes. Please see attached.

This Problem Set is due on Friday, Oct. 26. 

Helloooooo Friendz

 I need your help

I have to submit a research proposal and the topic is:

Foreign Trade is the key catalyst for the economic development of Pakistan

Kindly help me as soon as possible.....

Thanks

hai, everybody, now i do a research about the oblique impact of crash barrier by using ABAQUS. From this simulation, i need to find an energy absorption of crash barrier. So, i hope all can help me to give me an idea. Actually, i am a new user of ABAQUS. thanks

 Actually, i assume car as a rigid body to crash a guardrail.so the mechanical properties of guardrail already have.