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Physical significance of strain

Hi All,

I would like to know about physical significance of Strain. How
it determines failure of structure?

Say for example Compressive strain of concrete being 0.002.
Does it means that if (any) concrete member of original length 100mm deforms 2
mm (when compressed) will fail? Since Strain in this case will be (2/100) =
0.02?

Request you to help me to understand concept of strain.

 

 

Reinforcement bar relation with concrete (grade) strength

Hi,

For any structure (beam/slab/column etc) subjected to a same (fix) load, If I am using different grades of concrete (M10, M30, M60, M80 etc), what  will be effect on reinforcement? Will it remains same or change? Is there any thumb rule for same?

Whether percentage of reinforcement will remain same or change with change in grade of concrete? 

 

 

Thankyou, 

Amit 

Want guidance/help for Shell Modelling

Hi,

I am trying to do SHELL modeling of a problem to get Bending moment, Shear force, Axial Force etc.

Problem can be simply explained as below:

Model is just a like a room (block) with 4 surrounding wall, a roof and ground (Base).

Height (H) of (any) pair of opposite walls  are not same, i.e say H front = 5m and H rear = 3m.

(Base)  ground is straight whereas roof is inclined from front wall towards rear wall.

Problem can be sketched as below:

Better Processor for Mech Engg softwares???

Hi,

I want to run engineering softwares like solidworks, ansys, ls-dyna, hypermesh etc on desktop pc.

I am planning to assemble a pc for it. Can anyone suggest better processor? I am stuck between AMD fx8150, Intel's I7 2600k and I7 3770 processor.

Which one of above or any equivalent (in same budget) will be better?

 

Thankyou,

Amit 

Better Processor for Mech Engg softwares???

Hi,

I want to run engineering softwares like solidworks, ansys, ls-dyna, hypermesh etc on desktop pc.

I am planning to assemble a pc for it. Can anyone suggest better processor? I am stuck between AMD fx8150, Intel's I7 2600k and I7 3770 processor.

Which one of above or any equivalent (in same budget) will be better?

 

Thankyou,

Amit 

Body to Ground Spring in ANSYS CLassic

Hi All,

I want to model underground circular pipe embedded inside ground/earth for transient structural analysis in ANSYS Classic.

I am using shell element for pipe structures. To represent surrounding ground/earth,

I want to use Springs of appropriate stiffness on outer periphery of pipe structures.

Can anybody guide/help how to represent this springs? Which element to use in ANSYS Classic.

Or can somebody show me any another way of solving this problem.

 

 

Thankyou,

Difference between Beam and Shell Model

Hello, I am trying to solve structural problem of loaded pipe structure in ANSYS.

I tried two method/way.

First I modelled pipe structure as BEAM element and defined the cross-section.

Secondly, I modelled the pipe structure as Shell element and defined thickness. 

Now during post-processing, I noticed very large deviation in shear force, axial force and bending moment (nearly 3 times more in BEAM model cmpr to SHELL model) 

Can anybody guide/help to rectify model and bring this deviation down? I dont want to go for Pipe element of ANSYS.

Modelling primitives for Plane strain

Hi All,

I am very new to FEM process and ANSYS as well. 

I am trying to do a plane strain problem (2D) in ANSYS. 

My problem is  I dont know how to model primitives like sphere, cube, cylinder etc for 2D plane strain problem.

Like say can i model circle of 20mm radius for modeling sphere of 20mm radius???

Or can i model square of 50mm length for cube of 50mm.

May sound very dumb, but this is my geniune problem 

 

Thankyou for your time and help (in advance) 

 

 

Amit  

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