- #1
Total_Damage
- 9
- 0
Is there any material which could change from liquid state to solid state after appiled some force?
Smart Materials: Liquid to Solid Transformation
- Thread starter Total_Damage
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Discussion Overview
The discussion centers around the properties and applications of materials that can transition from a liquid state to a solid state under applied force, particularly focusing on non-Newtonian fluids and their potential use in protective applications such as bulletproof materials.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- Some participants mention that certain non-Newtonian fluids can change their viscosity in response to applied force, returning to a fluid state when the force is removed.
- A shear thickening fluid is proposed as a candidate for the desired property, with wheat flour dough cited as an example of a material that becomes more viscous under stress.
- Another participant highlights corn starch suspension as a superior example of a shear thickening liquid, noting its behavior under different stress conditions.
- A participant expresses interest in whether such fluids could provide bulletproof properties and if they could self-heal after being penetrated by a projectile.
- The idea of layering metal and non-Newtonian fluid to create a target material with reduced penetration is proposed, specifically using RHA and non-Newtonian fluid in alternating layers.
Areas of Agreement / Disagreement
Participants generally agree on the properties of non-Newtonian fluids and their potential applications, but there is no consensus on the feasibility of using these materials for bulletproof applications or self-healing capabilities.
Contextual Notes
Participants have not fully explored the limitations or specific conditions under which these materials might perform as intended, nor have they resolved the technical challenges associated with layering different materials for penetration resistance.
Who May Find This Useful
This discussion may be of interest to materials scientists, engineers working on protective gear, and individuals exploring innovative applications of non-Newtonian fluids.
- #2
mfb
Mentor
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Some non-Newtonian fluids can do something similar - they will return to the fluid state if the force stops, however.
- #3
pukb
- 94
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a shear thickening fluid (approximately) may serve your purpose. Its viscosity increases considerably when stressed. Best example is a wheat flour dough. Initially it has low viscosity but as you start applying force to make is uniform it becomes more viscous.
Density wise I can't think of an example (density increasing considerably with applied stress) in semi solid and solid materials.
Density wise I can't think of an example (density increasing considerably with applied stress) in semi solid and solid materials.
- #4
Alkim
- 98
- 2
In fact corn starch suspension is a very good shear thickening liquid (much better than wheat though), for example you can run over it, but if you walk slowly you will sink: see demo here.
- #5
Total_Damage
- 9
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Thank you Very Much Mr.Alkim,Mr.pukb,Mr.mfb. :shy:
Now I got an idea, how to make it... really super video alkim. another thing I want to know that, Is this fluid acts as a Bullet proof?. I mean it will withstand the deformation of the pointed bullet penetration.
And too this one if the penetration made by the projectile will heals itself? Like self Haling Structure...
Actually my target is 18mm thickness, I just want to make the target into low penetration material. is that possible by making layer of metal and Non Newtonian fluid to avoid penetration? if I'm using RHA is a target means 3 layers of RHA with 3mm thickness and 3 layers of Non Newtonian fluid with 3mm thickness. the arrangement is like layer by layer, first RHA, then Non Newtonian. this one is my need? is that possible?
Now I got an idea, how to make it... really super video alkim. another thing I want to know that, Is this fluid acts as a Bullet proof?. I mean it will withstand the deformation of the pointed bullet penetration.
And too this one if the penetration made by the projectile will heals itself? Like self Haling Structure...
Actually my target is 18mm thickness, I just want to make the target into low penetration material. is that possible by making layer of metal and Non Newtonian fluid to avoid penetration? if I'm using RHA is a target means 3 layers of RHA with 3mm thickness and 3 layers of Non Newtonian fluid with 3mm thickness. the arrangement is like layer by layer, first RHA, then Non Newtonian. this one is my need? is that possible?
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