Posted by Andrew DeWolfe on Fri, Apr 16, 2010 @ 12:51 PM
ASTM D412 ( D 412 ) covers the tensile properties of thermoset rubbers and thermoplastic elastomers. The specification describes two test methods, A and B. Method A is common and can be performed on a universal testing machine (tensile testing machine). If you are going to perform this test, you should read the entire specification from ASTM. This is a quick summary to decide if this test is right for you, and to point out what equipment you need to perform the test.
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Posted by Andrew DeWolfe on Fri, Mar 26, 2010 @ 12:11 PM
This video shows a compression test on a rubber door seal to obtain the load vs. deflection curve and to determine the load at various displacements. For example, our customer wanted to know the load at 5, 15, and 30% compression of the original height. The zero point on the X (displacement) axis was set for the design height. Load on the chart before or after the zero point would indicate manufacturing tolerance- either the seal was produced too large or too small.
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Posted by Andrew DeWolfe on Mon, Mar 15, 2010 @ 02:43 PM
ASTM D1414 (D 1414) covers multiple properties of O-Rings. Part of the specification includes tension testing for determining the breaking force, tensile strength, and ultimate elongation of an o-ring. The tension test is intended to be performed on a universal testing machine (tensile testing machine). If you are going to perform this test, you should read the entire specification from ASTM. This is a quick summary to decide if this test is right for you, and to point out what equipment you need to perform the test.
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Posted by Andrew DeWolfe on Wed, Jan 27, 2010 @ 02:24 PM
This video shows an example of a Rubber Property Test - Adhesion to Flexible Substrate as specified in ASTM D413 (D 413) & ASTM D378 (D 378)
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Posted by Andrew DeWolfe on Mon, Jan 11, 2010 @ 08:16 AM
The International Tennis Federation (ITF) developed a specification that is used to determine the forward and return deformation characteristics of a tennis ball. Many conceptually similar tests can be used by companies who do not make tennis balls as this compression test is a good overall quality control check of many products - whether it be a basketball, football, soccer ball, golf ball, dog toy, etc.
To perform the test on a tennis ball, do the following:
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