What is the strongest known bendable material?

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Discussion Overview

The discussion revolves around identifying the strongest known bendable material, particularly in the context of applications such as crossbow strings. Participants explore various materials and their properties related to tensile yield strength and flexibility.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant defines "bendable" as a material that can run through a pulley while retaining tension and "strong" in terms of tensile yield strength.
  • Some participants propose carbon nanotubes as a potential candidate for the strongest bendable material, though they request additional context.
  • Another participant mentions Zylon as a strong fiber, questioning its usability as a rope or flexible string.
  • There is a discussion about the practicality of using Zylon, noting its typical application in reinforced structures rather than as a standalone string.
  • One participant suggests that the original question may be odd, arguing that a crossbow does not require the strongest material due to its less demanding application.
  • Another participant counters that the draw weight of the crossbow could necessitate stronger materials, referencing the possibility of building a crossbow with a 10-ton draw weight.
  • Anecdotal evidence is shared about a powerful crossbow built using unconventional materials, illustrating the potential for extreme applications.

Areas of Agreement / Disagreement

Participants express differing views on what constitutes the strongest bendable material, with no consensus reached on a definitive answer. The discussion includes multiple competing perspectives on material suitability for specific applications.

Contextual Notes

Some limitations include the lack of clarity on the definitions of "bendable" and "strong," as well as the specific requirements for crossbow applications that may influence material choice.

magic9mushroo
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By "bendable" I mean "you can run it through a pulley and it retains tension", and by "strong" I refer to tensile yield strength.

Thanks in advance.
 
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Carbon nano-tubes I suppose - could you provide some context, though?
 
russ_watters said:
Carbon nano-tubes I suppose - could you provide some context, though?

Strongest crossbow string, basically.
 
So is Zylon usable as rope/flexible string?
 
Don't know. I have only seen it used soaked with epoxy to reinforce high-field magnets. Off the spool the stuff is a bit ... hairy, so for a string you'd have to insert it into some kind of shell, the way climbing ropes are built.
 
The question seems odd - a crossbow isn't that demanding of an application, so you really don't need anything close to the strongest.
 
russ_watters said:
The question seems odd - a crossbow isn't that demanding of an application, so you really don't need anything close to the strongest.

That depends on the draw weight. There isn't really a limit on how stiff you can make the prods, after all. I was trying to work out if you could build a 10 ton draw-weight crossbow.
 
Ive seen this done, some guys I worked with years ago built a crossbow based on plans for a trigger they found online. They used a leaf spring from an old van and a 10t cable as the string. The arrow was 20mm dia stainless rod, with a ground tungsten carbide tip brazed on the end. Long story short, it needed to be cocked with the overhead crane and fired from a vice, it shot straight through a solid brick wall, then it was declared evil and promptly dismantled.
 
  • #10
Carbon nanotubes
 

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