Glass - Stress relaxation test

[shriisall]

Hi,

I want to perform stress relaxation test for glass. I have written my own code to deduce prony series from stress relaxation data.


Most of the standards (literature) describe the experiment for elastomers. I am not sure how to conduct the experiment for glass samples at high temperature. How do I gauge things like, glass cylinder dimensions, how much % compression to apply, how long to wait for the stress relaxation etc.?

Is the procedure for glass similar to elastomers?

Thanks!

[Jorgen]

The procedure should be similar for glass. The details of how you measure strain, stress, apply the temperature, etc, will be tricky. But if you are careful I see no reason why you couldn't make it work.

-Jorgen

[shriisall]

Jorgen, thanks for the reply.

As I said I am new to experiments. I have some very conceptual issues regarding performing the test.

- Is it ok to apply a very small strain in glasses for the test (instantaneous strain, then hold it constant)? Of the order of 1%. Because with higher compression, the area starts to play a role

- From the test we only get load vs. time response. To convert the load to stress response, we simply divide it by the area of cylinder (assuming 1% compression). Am I right?

Thanks in advance!