www.sefindia.org

[Pulkit Velani]

Hello SEFIans,
Namaste!

I have modeled a simple beam and a simple frame in ANSYS with solid element. Unlike 2D elment (Line Body) analysis, I am unable to genrate the Bending Moment Diagram (BMD) or Bending values in beam for solid elments.

Anyone having experience on similar work please respond.

regards,
Pulkit

Structure Details:
Beam:
Beam = 230mm x 300mm, L= 3m, Fixed at Both end
Load = 10 kN/m UDL on beam
Material = M20

Frame:
Beam = 230mm x 300mm, L= 3m
Column = 230mm x 300mm, H = 3m
Load = 10 kN/m UDL on beam
Material = M20
PS: My discussion on ANSYS forum: https://forum.ansys.com/discussion/comment/123820#Comment_123820

[vikram.jeet]

Just a generic view

Solid element , if modelled , provide output in form of stresses , as per Staad . BM is to be calculated manually.

Generally very thick beams are modelled as solid elements. But 230x 300 mm beams need be tackled as beam member which provide BM & SF diagrams straightaway.

[es_jayakumar]

Solid modeling in STAAD gives axial stresses, and not BM values, as intimated by Er.Vikramjeet. I modeled a simply supported  solid beam carrying UDL, inquisitively. Please note that roller support should be assigned at one end else, the results may look awkward. The maximum solid stress at the top and bottom fibres at mid span is found in very good agreement with that computed by simple bending theory (0.335 N/mm² and 0.333 N/mm² respectively).

ES Jayakumar

[Pulkit Velani]

Thank you Vikram sir.

Just a generic view
Solid element , if modelled , provide output in form of stresses , as per Staad . BM is to be calculated manually. - vikram.jeet

I will try to model the same in STAAD. One of my friend has suggested me publication which compares the results of STADD and ANSYS. I need to go through it and I am sharing here for a larger benefit. (https://www.iosrjournals.org/iosr-jmce/papers/vol9-issue1/H0915778.pdf?id=7608)

Generally very thick beams are modelled as solid elements. But 230x 300 mm beams need be tackled as beam member which provide BM & SF diagrams straightaway.- vikram.jeet

True, I agree with you. After initial modelling of such a small beam (230x300) my plan is to model a thick and deep beam. And at that time I will be in need of bending moments at different lengths. Hence, I am carrying out this exercise.

[vikram.jeet]

Good , Er Pulkit Velani

Pl go through yr excercise on deep beam and share yr findings on sefi. Also pl see the posting from Er ES Jayakumar regarding solid modelling as well as results of solid models in accordance with bending theory.

Best wishes

[Pulkit Velani]

@Jaykumar Sir: Thank you sir. I shall go through the attched file and get back to you for any discussion and clarification.

@Vikram sir: Sure, once I reach to conclusion I shall share the outcome at SEFI.

[es_jayakumar]

For deep beams under bending, simple bending theory is is not much compatible, I think. Strut and Tie approach is perhaps  more rational.

E S Jayakumar