During a conversation with one of our Application Engineers, he brought to my attention that many of our customers ask him how to "Pot" the ends of "bones" and perform compression, tensile, or fatigue test on the bone .... So, we're sharing his techniques with you.
Technique #1
Technique #2
Technique #1
- “Paint” the end of the bone with Krazy Glue or equivalent and let it dry.
- Use 3M ScotchWeld Acrylic Adhesive; this is a two part epoxy so you will need to use a mixing nozzle to get the correct blend.
- Put the epoxy into a “sawed off” hollow square tube (you can purchase long lengths of square metal tubing from many local steel suppliers).
- Put duct tape on one side of the tube to prevent epoxy from escaping.
- Place one end of the chicken bone into the epoxy and let cure (room temperature, 8 hours or so).
- Do the same to the other end of the chicken leg (room temperature, 8 hours or so).
Technique #2
- Same as above, but no need to “paint the ends with Krazy Glue”.
- Use Cerrobend Alloy; this melts at 158° F and has a very fast cure (about 10-15 minutes maximum).
- Here is one possible supplier. There are many more…
- Pour it into the square tubing as described above.
2 comments:
Re: Technique 1
I have purchased the 5900 Testing System but the gripper jaws only open to 1/4 in. How do I load the assembly onto the machine to run a compression test? Thank you.
Hello,
Great question!
Some tensile grips can be used to grip the epoxy ends of the specimen and place the specimen into tension OR compression. However in other cases, depending on the exact grips, other accessories might be needed in order to perform compression testing.
To better help you identify how to test your specimens in compression, it would help for us to see images of your specimens and load string. If you could please email me with more details about your situation along with images of your setup at chirag_patel@instron.com, I will be glad to assist you.
Thank you again for your question!
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