Large Displacement Simulation: Hose Clamp

In this entry we will take a look at how we can analyze the bending of a hose clamp using SolidWorks Simulation. We will assume the band begins flat and bends in a complete circle, 360′. To analyze this we will need to consider whether a nonlinear study will be required, or whether a static study will be sufficient. Due to the large displacements involved with the bending, there will be geometric nonlinearity in this analysis. This type of nonlinearity can be solved either using a nonlinear study or a static study with the large displacement setting turned on. Let’s take a look at solving this with the large displacement solver.

HoseClamp

Here is our setup. We will apply a fixed geometry fixture to one end face, and a prescribed rotation of 360′ to the other. These fixtures will fully define our model, and so at this point we can mesh and run our study. In my analysis, I meshed using shell elements due to the thin component with constant thickness.

setup

And here are our results. First, the undeformed displacement plot.

underformed

When running a static study with the large displacement solver, the animation may be incorrect. This is because only the final position results are saved. By playing the animation and stopping halfway through we see this is the case. Each incremental step is lost and so the animation merely interpolates between the first and final steps. If an accurate animation is desired, we must run with a nonlinear study and specify to save all results.

animation halfway

Fully deformed results show correct position. Notice here how I have the undeformed shape superimposed to show the starting position as well. Our large displacement solver was able to properly apply our rotation constraint and solve.

fully deformed