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ASTM Testing for Plastics and Polymers
Lloyd Instruments has developed a special jig for easy determination of peel strength of the aluminum foil on contact lens blister packs. Lloyd Instruments offers an advanced texture profiling system designed to help the baking industry ensure end-product quality. The CS2 Series force testing machines are ideal for plastic testing when accurary, repeatability and documentation of results are key. Two types of graphic representation can be constructed for the creep rupture envelope, as shown in Fig. Figure 18 b shows a semilog plot of creep rupture stress as a function of failure time.
Micro-scale mechanical testing you can see AND believe
As a result, the log-log coordinate system Fig. Furthermore, creep rupture data tend to display linearly on this coordinate scheme.
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Creep strain data plots can be done in various forms. Figure 18 shows three methods of analyzing these data.
How to test Plastic Properties – School of Testing
Each method holds one variable stress, strain, or time to be constant. For constant stress, Fig.
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The data can be displayed either as a set of usually near-linear linear lines on log-log paper Fig. The parallel straight lines on log-log coordinates are called a creep strain plot Fig. Isochronous Creep Data.
If the time parameter is held constant, a set of isochronous or constant time stress- strain curves results Fig. A linear coordinate system is used to display these results.
The slopes of these isochronous creep curves produce the isochronous modulus graph Fig. If the slopes of the semilog curves are replotted against time, a set of nearly linear lines on.
Related Handbook of Polymer Testing : Short-term Mechanical Tests
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