Investigating the Young's Modulus of certain materials

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Discussion Overview

The discussion revolves around investigating the Young's Modulus of various materials, specifically examining how temperature affects this property. Participants explore the hypothesis that increasing temperature will lower the Young's Modulus and consider other potential influencing factors.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant hypothesizes that increasing temperature will lower the Young's Modulus of materials.
  • Another participant agrees that increasing temperature does lower Young's Modulus slightly, while reducing temperature into cryogenic ranges increases it, though the effect is not substantial.
  • There is a suggestion that yield and tensile strength are more significantly influenced by temperature than Young's Modulus.
  • A participant questions whether a measurable change in Young's Modulus can be observed using standard equipment.
  • A graph of modulus versus temperature for steel is shared, indicating that the modulus changes with temperature and should be measurable.

Areas of Agreement / Disagreement

Participants generally agree that temperature affects Young's Modulus, but there is a lack of consensus on whether other factors might also influence it. The discussion remains open regarding additional factors that could be investigated.

Contextual Notes

Some assumptions about the extent of temperature's influence on Young's Modulus and the potential for measurement using standard equipment are not fully explored.

calum
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I am investigating the Young's Modulus of certain materials and what factors have an effect on the Young's Modulus of materials.

I am going to be altering the temperature, my hypothesis being that increasing the temperature will lower the E of the materials.

Are there other factors I could investigate that would have an effect?
 
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Hi calum,
Yes, increasing temperature will lower E slightly. Conversely, reducing temperature well into the cryogenic range increases E. But it isn't a huge amount. Yield and tensile strength for example, are much more heavily influenced by temperature.

To answer your question, I don't think there's any other factors that affects E other than temperature.
 
Q_Goest said:
Hi calum,
Yes, increasing temperature will lower E slightly. Conversely, reducing temperature well into the cryogenic range increases E. But it isn't a huge amount. Yield and tensile strength for example, are much more heavily influenced by temperature.

To answer your question, I don't think there's any other factors that affects E other than temperature.

Ok thanks for your help. You say E is lowered slightly, do you think it would be possible to observe a measurable change in E using quite standard equiptment?
 
Attached is a graph of modulus versus temperature for steel, taken from MIL-HDBK-5. As you can see, the modulus changes, and it should be measurable.
 

Attachments

Q_Goest said:
Attached is a graph of modulus versus temperature for steel, taken from MIL-HDBK-5. As you can see, the modulus changes, and it should be measurable.

That's great thanks, really helpful thanks for your help :)
 

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