The world is doomed without a new techno revolution.
Were are the lighter-than-plastics-stronger-than-steel alloys?
Were are the exotic materials showing unique never seen before properties?
my brain has exploded.
>>7980629
In development, honestly. Materials sciences research is really taken for granted and not popularized because of how boring it seems.
>>7980647
>materials """"" science"""""
>>7980629
>> lighter than plastic stronger than steel
Those would be composites. Metals are inherently dense and heavy.
>> exotic materials
Such as? We got stuff that changes shape when we shine light on it. We got superconductors that can hold their place in magnetic field. We got fluids that change viscosity in an electric field. Heck we've pretty much got negative index of refraction metamaterials that work in the visible spectrum
Look a lot of materials science is focused on solving the energy crisis right now. That is materials for nuclear reactors, solar cells, batteries, etc.
There's also work on fixing and augmenting humanity. Mainly stuff like neural interfaces, biocompatible materials, tissue culture etc.
Source: just got back from the Materials Research Society meeting
>>7980721
We have all this stuff but we don't use it so it's redundant
>>7980629
Who cares about that. What I want to know is when are we gonna find a new energy source thats better than both electricity and nuclear.
>>7980731
electricity isn't a power source, it's a power transfer medium
>>7980692
material science is more of a science than any engineering. you literally would not exist if not for material science discoveries.
>no semiconductors
>no ceramics
you're like a baby crying in our hands. we could wring your neck at any point just by retiring early.
We have some amazing materials already invented, but they're currently too expensive or difficult to produce in a useful quantity. This will change, but not necessarily quickly
>>7980692
>guaranteedreplies.jpg
>posting in a materials science thread
OP is a faggot
Steel is real
Composites are mud-hut-tier caveman bullshit
Graphene is meme
>>7980692
the biggest bottleneck for sexbot development is materials.
we still haven't found a suitable synthetic analog to human muscle tissue.
power supply and computational power can be handled through a tether.
>>7981465
graphene will replace so much shit with its superconductivity and strength. you have no idea how fucked you are little mechfag lol.
>>7981469
>we still haven't found a suitable synthetic analog to human muscle tissue.
dielectric elastomers
Metallurgist here
Girls have no idea what metallurgy is
>their face when
>>7981470
>graphene
>strength
You know so little yet you talk so much
>>7981473
sluggish and can't pass the arm wrestling challenge.
>>7981477
how nu are ru bud? people knew about graphene being strong as shit since the early 2000s. get with the times. i guess silvan learning doesn't cover it.
>>7981480
obviously the tech needs improvements but it's the closest analogy you can work with. servos and shit obviously aren't analogous to muscle.
>>7981485
thats why i used to term "suitable". there are some minimum specifications that need to be met for the tech to be implemented and we aren't even close to those benchmarks.
>>7981494
it's still the closest. DEs allow for the structural design of a robot to be immensly close to a human, but unlike pneumatics you don't need air and unlike hydraulics you don't need liquids, both of which require a pump that is electrically powered. it simply uses its own structure coated with various conductive materials to sustain position states. once we get better materials for this, both for the elastomer and for the conductivity, we can get it to support higher loads via higher voltage ranges. you'd still have it attach to a skeleton so it could bear the load consistently but the muscle itself is behaving with a greater similarity to that of a cellular counterpart. it has a smaller footprint for prosthetic too due to only needing a IC driver and power source rather than a motor.
>>7981481
Spider silk is also strong but that doesn't mean people can build tanks out of it
>he fell for the graphene meme
>>7981539
printing graphene in a way that retains its strength is the brunt of the problem but that doesn't deny it's potential strength. people said inconel was garbage when it was first made and now it's the standard for high shearing thresholds. don't try to act smart just by perversely adhering to the notion that graphene is a meme.
Ekoa is pretty awesome. It's basically hippie carbon fiber. It's made from a bio-based epoxy and uses flax fibers instead of carbon fiber. Not as strong as carbon fiber but still very strong and much more environmentally friendly. It also has superior vibration dampening properties.
Carbon fiber Ekoa composites are pretty cool. Outer layer of carbon fiber with an ekoa core. Best of both worlds.
Plus it looks like wood.
>>7981539
also Kraig Biocraft Laboratories made silk gloves that were better than kevlar, so the memer is you here.
ultem
>additive-printable polymer
>characteristics akin to 6061
>>7981465
Why is it called steel if you have to pay for it?
>>7981485
You don't need artificial muscles to be like muscle. One of the big things muscles provide is variable impedance actuation and this can be realized with rotary actuators. Muscles not only control position and force but also stiffness and damping
https://m.youtube.com/watch?v=PATvv47QfQs
>>7981499
Rotary electric actuators are fucking amazing. Efficient as fuck, fast as fuck, controllable as fuck. They also produce rotary motion directly, which is what you really need.
And now we're starting to get rotary electric actuators with high torque densities. We have actuators in the lab that have ~150 Nm/ Kg torque densities. And they are pretty fucking compact too.
Elastomers are inherently sucky. Stress relaxation and fatigue are big fucking problems.
Another problem is that dielectric elastomers cannot be very efficient in practice. A dielectric elastomer is a capacitor, you charge it up and the plates move closer together. Now what happens when you want to stop contracting? The charge on the capacitor must be decreased.
In the ideal case you cannot recover all of this charge, you can only get 90% back.
In practice, people just throw a big resistor between the plates so you get continous leakage but better control
>>7980629
>he didn't study computational biology
>he doesn't know that's the new engineering
>>7981756
Hey friend, we have a /sci/ discord where we talk about sci stuff except minus the memeposting (mostly). Join us if you want, you seem knowledgeable.
:^)
https://discordapp.com/invite/0lqbvcXEubLYMdhn
>>7981548
>> printing graphene in a way that retains its strength
Graphene is an atom thin layer of carbon, multiple layers of graphene are simply graphite. Stacking multiple sheets of graphene on top of each other result in different bulk properties than the individual sheets.
Another reason why graphene is a bad structural material is that a material consisting of a continous single sheet is the perfect material for crack propagation. You introduce one tiny crack and it can just keep growing.
Now if our graphene is rolled up into tiny tubes, a crack can not grow continously and instead must form in each tube. In short nanotubes > graphene
>>7980629
>Were are the exotic materials showing unique never seen before properties?
Maybe in the green zone? Imagine just one asteroid of gold or even silver. It would be a gold rush all over.
Bankers and their puppet politicians know this and are stiffling the space tavel/transport industry to prevent control from slipping out of their hands.
Until we bring back a true free enterprise economic market engine there will be no rapid growth "Tech Revolution" like the industrial revolution.
>>7981776
dumb capitalist. socialism paves the way forward!
>>7981756
I take it the actuators are expensive to make?
>>7981756
>You don't need artificial muscles to be like muscle.
you do if you want to make something that people want to fuck.
>>7981825
bait?
>>7980629
Were?
>>7980721
can you post some examples? this shit sounds cool as fuck
>>7981845
>>7981845
the guys that would buy these things are the same guys who have to have 120 fps in every game and nitpick every detail about an experience. i'm sure you'd get a couple of fetishists who wouldn't mind fucking an awkwardly pulsating servo driven model, but only muscle really moves under the skin like muscle. you'd need a whole separate system just for that. the whole purpose is to go as close to 1:1 as possible, and i dont think rotary can get through the uncanny valley.
>>7981474
wtf is metallurgy
not a grill btw
>>7981886
Wat's wong?
>>7981920
You're waifu is disrupting your ability to see other forms of potential in robot development, it's at this point you ought to stop.
>>7981474
What is your favorite alloy and why is it invar?
>>7981937
don't wat me, I ain't a light bulb
>>7981758
Holy fuck I lost my shit with that pic
nice anon, nice
>>7982070
>it's at this point you ought to stop.
why? sexbots would make billions. their creator would be infamous, if not famous. it would incite scandal and forever alter human development.
why the fuck wouldn't i want to be that guy? isn't that the point of this engineering gig? to change the world with one of your creations.
>>7980731
dyson sphere you dumbnut
>>7981920
Dielectric elastomers have actuation voltages in the kilovolt range. I'm not sticking my dick in that.
>>7982118
Kek
AI is the technology to solve all other technologies, and it will reach human-level by 2030. everything's moving smoothly, the world is not 'doomed'
>>7982118
Besides the small complication of a dyson sphere requiring more material to construct than the entire mass of the Earth, it seems like a great idea. We just need to mine all of Mars and Venus to construct it and we are set. Easy.
>>7981823
Yes said torquey lab actuators are expensive, but that is because they are one offs. They could easily be mass produced. You could probably make/sell em' for less than $100 a pop.
