How can I estimate the bending stress for a hollow tube under uniform load?

Click For Summary
SUMMARY

The discussion focuses on estimating the bending stress for a hollow tube with a diameter of 38 mm and a thickness of 4 mm subjected to a uniform distributed load (UDL) of 500 N/m². The material is mild steel with a Young's modulus (E) of 200 GPa and a Poisson's ratio of 0.3. Participants suggest using Castigliano's method for statically indeterminate structures and propose approximating the problem as a simply supported beam to obtain upper and lower bounds for the bending stress and deformation. Finite Element Analysis (FEA) in 3D is also recommended for validation.

PREREQUISITES
  • Understanding of bending stress calculations in structural engineering
  • Familiarity with Castigliano's theorem for statically indeterminate structures
  • Knowledge of Finite Element Analysis (FEA) principles
  • Basic concepts of material properties, including Young's modulus and Poisson's ratio
NEXT STEPS
  • Research the application of Castigliano's theorem in structural analysis
  • Learn how to perform Finite Element Analysis (FEA) for bending stress evaluation
  • Study the behavior of simply supported beams under uniform loads
  • Explore material property implications on bending stress in mild steel
USEFUL FOR

Structural engineers, mechanical engineers, and students studying material mechanics who are involved in analyzing bending stress in hollow tubes and similar structures.

parch
Messages
17
Reaction score
0
Dear All,

Please see the picture. I need to find the bending stress for that profile.

Its hollow tube dia= 38 mm, 4 mm thick. its is acted with udl of 500 N/m2 on its outer surface.
How can I estimate the bending stress, deformation. Assume it as mild steel with E = 200 Gpa, poission ratio = 0.3.

I am trying to validate this with FEA in 3d.
Kindly share your ideas. Thank you in advance.
 

Attachments

  • pipe.png
    pipe.png
    1.7 KB · Views: 566
Engineering news on Phys.org
It's statically indeterminate so you can use a method for those types of problems. Maybe Castigliano's.

Or, you could get upper and lower bounds by treating the bends as rigid and pin-jointed. Then it's an easy simply supported beam problem.
 

Similar threads

Corrugated tube (bellow) under axial load
  • · Replies 2 ·
Replies
2
Views
2K
Confidence in FEA stress values?
  • · Replies 9 ·
Replies
9
Views
4K
How Can We Calculate the Fatigue Life of a Simply-Supported Beam?
  • · Replies 6 ·
Replies
6
Views
3K
How do I calculate the bending moment and maximum load for a cantilevered stud?
  • · Replies 7 ·
Replies
7
Views
16K