MPA calculation VS MPA listed on materials

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  • Thread starter Thread starter Ed Kelly
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Discussion Overview

The discussion revolves around the calculation of Mega Pascals (MPa) from tensile strength values, specifically addressing a participant's confusion regarding the relationship between their calculated value and the MPa values listed for various materials. The conversation touches on unit conversions and the interpretation of pressure measurements.

Discussion Character

  • Conceptual clarification
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant calculated a tensile strength of 0.51 PSI to correspond to an MPa of 0.0035163, expressing confusion over the significantly higher MPa values listed for materials like glass.
  • Another participant suggests that MPa likely refers to Mega Pascal and questions the units of the tensile strength provided.
  • A subsequent post clarifies that the tensile strength is indeed 0.51 PSI.
  • Further clarification is provided regarding the proper notation of MPa and the implication that the discussion involves unit conversion from PSI to MPa.
  • A later reply humorously notes that 0.51 PSI is a very low pressure, suggesting minimal requirements for a container to withstand such pressure.

Areas of Agreement / Disagreement

Participants generally agree on the need for clarity regarding units and the conversion between PSI and MPa, but the initial confusion about the calculated values and their implications remains unresolved.

Contextual Notes

There is a lack of clarity regarding the assumptions made in the initial calculation and the specific context in which the tensile strength is being applied. The discussion does not resolve the discrepancies between the calculated and listed MPa values.

Ed Kelly
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Hi,

I am not a mathematician or scientist or student. In advance I ask that you please excuse my ignorance. I calculated that at tensile strength of .51 equals an MPA of .0035163. Thank god for internet calculators. I do not know what MPA means, but materials are listed this way. So if I want to choose a material with an MPA of greater than .0035163 and I look at the MPA of materials, the MPA listed seems mammoth in comparison and defies logic. For example, glass is listed as having an MPA of 60. So what am I missing?
 
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Sorry - .51 PSI
 
Ed Kelly said:
Sorry - .51 PSI

Yeah, but did you get DEvans answer of what MPA means (to be accurate, it should be written as MPa)? You never indicated if by that information, you realize that this is a psi to MPa unit conversion.

Zz.
 
Oh. For 0.51 PSI you don't need much of a container. You could probably get that much pressure from a party balloon.
 

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