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# Calculating plastic strength (tensile and compressive)

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This topic contains 5 replies, has 5 voices, and was last updated by  Clement Holm Hempel 2 years ago.

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I am building a muscle-powered version of the shredder for my profielwerkstuk (the dutch equivalent of EPQ). To do this I have to theoretically calculate the strength of PET, HDPE, PP, PVC and PS. Is it possible to theoretically calculate the tensile and compressive strength of these different types of plastics and if so, how can I calculate it?

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### In reply to: Calculating plastic strength (tensile and compressive)

hero
28/11/2016 at 18:04
2

Welcome to Precious Plastic @sterrevdh

Compressive strength
http://www.matweb.com/reference/compressivestrength.aspx

Tensile strength
http://www.matweb.com/reference/tensilestrength.aspx

### In reply to: Calculating plastic strength (tensile and compressive)

helper
24/10/2017 at 08:40
0

May i ask why you need these details? What are you trying to do with them.

### In reply to: Calculating plastic strength (tensile and compressive)

starter
01/12/2017 at 00:47
2

@thegrenengineers I am interested in making surfboard fins and experimenting with different plastics and composites like this example of fins already in production.

### In reply to: Calculating plastic strength (tensile and compressive)

starter
01/12/2017 at 00:50
1

sorry guys, iPad issues delayed tap and splat landed in wrong place,hard to delete so just changed script

### In reply to: Calculating plastic strength (tensile and compressive)

helper
11/12/2017 at 15:12
0

To get a pretty accurate estimate of the material properties you can look at the datasheet of the plastic in question. to find the datasheet just type “[plastic in question] datasheet” and look around. Feel free to ask further questions

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