3 point bending test on a beam

- March 16, 2021 at 7:45 pm
  
  nmarkiz
  Subscriber
  
  Hello,
  I am trying to simulate a 3 point bending test on a Beam with the following dimensions: L= 125 mm, W= 12.7 mm and T=3.2 mm.
  the span length is 51.2 mm ( the distance between the 2 supports).
  I took the advantage of symmetry and draw my geometry in space claim as following:
  Here the length of the beam is 62.5mm.
- March 16, 2021 at 8:01 pm
  
  peteroznewman
  Subscriber
  
  nI see the orthotropic material has lower stiffness in the Z direction, which I assume is the build direction. What direction was your beam built in? I expect it is the Y direction. That means the material orientation doesn't match the part orientation. A simple fix would be to swap the Y and Z values in Engineering Data.nTwo elements through the thickness is not sufficient for a good resolution of stress values. Change the mesh method to sweep so that you can use large element edge lengths along the length and width, but set the number of sweep elements to 8.nTry replacing the Remote Displacements with Displacement BCs on the two edges.nWhat results are desired and why don't the results you obtained satisfy the desired results?n
- March 16, 2021 at 9:20 pm
  
  nmarkiz
  Subscriber
  
  Hi Peter, nThank you for your response.nWell I didn't print my beam yet, however I have the previous orthotropic material properties. My friend did the simulation using ansys APDL where he used 3 solid rods, 2 as supports and one as pusher and the support is far 20mm from the origin. he got the following resultsnDeformation in Y nnStress in XnnnVon misses StressnnnI draw the geometry again and split the face 20 mm from origin and made a sweep mesh as u suggested. I applied Displacement as Boundary conditions. I want to match my results on workbench with Mechanical APDL. But unfortunately, I couldn't got the same results.nHere is the sweep method, however the generate the mesh with default element sizennnHere are the 2 Boundary conditions:nnnnnHere are the results I obtained which are different and there is a warning ( the deformation is large compared....)nnnnnThank you in advance.nn
- April 4, 2021 at 7:56 pm
  
  Mshrest2
  Subscriber
  
  Hi,nIn the model with solid rods used for bearing and pusher, how was the contact defined between the rod and the beam? n

Viewing 3 reply threads

You must be logged in to reply to this topic.

Ansys Innovation Space

Boost Ansys Fluent Simulations with AWS

Computational Fluid Dynamics (CFD) helps engineers design products in which the flow of fluid components is a significant challenge. These different use cases often require large complex models to solve on a traditional workstation. Click here to join this event to learn how to leverage Ansys Fluids on the cloud, thanks to Ansys Gateway powered by AWS.

Earth Rescue – An Ansys Online Series

The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.

Ansys Blog

Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.

Trending discussions