Orientation Effect on Puncture Test

[dcvanderbush]

Hello All,

Quick question regarding a testing procedure. I am currently tasked with determining if a test can be performed in a vertical orientation. This is in opposition to the current horizontal set up of the test. Currently, we test needle sharpness horizontally by attaching a device to a force gauge. Then we advance a membrane toward the device/force gauge assembly and record the peak force required for the needle to penetrate the membrane. If we were to move this test to a vertical alignment, would the force values change, and if so, would their difference be problematic in relating to the previous set up? We were just going to test the two different setups, however, since sharpness decreases with every membrane penetration, there is no way to test both fixtures with the same device effectively.

Let me know if the situation needs any clarification.

Thanks for your help, and I apologize if this is in the wrong forum.

Dave

 

[eljose79]

Hello Dave,

Thank you for reaching out with your question. Testing procedures can be a tricky aspect of scientific research, and it's important to consider all variables when making changes to a current set up. In order to determine if a test can be performed in a vertical orientation, there are a few factors to consider.

Firstly, it's important to understand the purpose of the test and how it relates to the current horizontal set up. Is the test being performed to measure needle sharpness or is it testing a different aspect of the needle? This will help determine if the force values will change and if that change would be problematic in relation to the previous set up.

Additionally, it's important to consider the mechanics of the needle and how it will behave in a vertical orientation. Will the force required to penetrate the membrane be affected by gravity or other external factors? It may be helpful to consult with an engineer or conduct simulations to better understand how the needle will behave in the vertical set up.

In terms of testing the two different setups, it may be possible to use the same device if you are able to adjust the force gauge and membrane position accordingly. However, if this is not possible, it may be necessary to use two separate devices to ensure consistent and accurate results.

I would also recommend consulting with other experts in the field or conducting a literature review to see if similar tests have been performed in a vertical orientation. This may provide insight into potential challenges and solutions for your specific set up.

Overall, it's important to carefully consider all factors and potentially conduct some preliminary tests before fully transitioning to a vertical set up. I hope this helps and good luck with your testing!