Hi, I want to do tensile analysis for my vulcanized rubber sample following the ASTM 412/ ISO 37. My starting rubber was ENR latex. As stated in that standard type 1, the standard thickness should be 2.0mm plus minus 0.2 mm. However, when I vulcanize the prepared sample around that thickness in drying oven, it resulted bubbles formed on the surface of the rubber film. this problem restricted me to proceed with tensile analysis as the sample will easily rupture for tensile and give me inaccuracy result. the problem is lessen when I reduce the thickness of the film to around 1.5mm. I am thinking to reduce the thickness, however, it will not following the standard thickness. Is it possible for me to do that with the above limitation? What is the condition/pre-requirement to reduce the thickness not following the standard (just for thickness part, other following the standard). I found some of papers that did tensile testing on vulcanized rubber sometimes not followed the standard thickness, but I do not know the reason behind that allowing to reduce thickness.
Any suggestion for me to solve this problem. Im really appreciate. Thank you.
In your situation not great reduction of the sample (film) thickness is possible. It is more important to provide good quality of surface and continuity of the sample as well as enough high ratio "length/thickness" of the sample in accordance with principal requirement of its uniaxial stress state under loading.
All the best.
Dear Anis Abdul Ghani,
You can report the tensile result and mention the thickness of the samples with the tolerance. It is so important that the samples are free of any defects as Dr. Serge has mentioned.
Dear Anis Abdul Ghani . See the following useful link: https://www.sciencedirect.com/topics/engineering/specimen-dimension
Kindly see also the following useful link: http://d-scholarship.pitt.edu/36362/1/Dong%20Ruochen_ETDPitt2019.pdf
Also check please the following useful link: https://link.springer.com/content/pdf/10.1007%2F0-387-29012-5_4.pdf
The following link is also very useful: https://www.elastocon.com/images/pdf/rubber-testing-education/elastocon-rubber-testing-booklet.pdf
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials
- Polymers