Micro tensile testing machines

[MightyG]

looking to design and hopefully build a micro-tensile tester to test the properties of human hair.

as part of my uni class I need to design the grippers involved and have a look at non contact extensiometers.

Could anyone point me in the right direction with some links or books? or even provide some first hand info?

the problems I can think of atm that I don't have much of an idea how to get about are measurement of the test piece and the fact that the cross sectional area of bio-materials normally reduces dramatically with extension so the could possibly slip out of the grips.

any help would be very appreciated :)

 

[sanchitsood]

Hi there
Even i am doing a very similar project. Could you please help me with it.

looking to design and hopefully build a micro-tensile tester to test the properties of human hair.

as part of my uni class I need to design the grippers involved and have a look at non contact extensiometers.

Could anyone point me in the right direction with some links or books? or even provide some first hand info?

the problems I can think of atm that I don't have much of an idea how to get about are measurement of the test piece and the fact that the cross sectional area of bio-materials normally reduces dramatically with extension so the could possibly slip out of the grips.

any help would be very appreciated :)

 

[oswaler]

I would recommend starting by researching existing micro-tensile testing machines and their features. This will give you a better understanding of the design and components involved. Additionally, you can reach out to manufacturers or experts in the field for guidance and advice.

In terms of designing the grippers, it would be important to consider the material properties of human hair and how it behaves under tension. This can help determine the type of grip and force required for accurate testing.

For non-contact extensometers, I would suggest looking into optical or laser-based systems, as these can provide precise measurements without physically touching the hair sample.

In terms of resources, there are various textbooks and articles available on the design and use of micro-tensile testing machines. It may also be helpful to attend conferences or workshops related to this topic to learn from industry experts and network with other researchers.

Regarding the potential issue of the hair slipping out of the grips, this could be addressed by using specialized grips or by designing a clamping system that minimizes slippage. Additionally, considering the sample size and shape can also help prevent slipping.

I hope this helps guide you in your design process. Best of luck with your project!