If plastic control arms are such a big issue, how come noone's just casting their own out of aluminium? Make a mold out of the original one and ur golden. Even plain beer cans will give you comparable or better strength, not to mention actual duralumin
>>28796699Double dubs+69, nice
>>28796699>Even plain beer cans will give you comparable or better strengthNo they won't. Your sand cast beer can control arm will probably be porous as fuck and likely weaker than the reinforced plastic ones from the factory. Furthermore they'll be more susceptible to fatigue because of your uncontrolled grain size, impurities, and poorly optimized geometry.
>>28796703Eh, it's ridiculously easy to make a non porous cast. Even jeets do it accidentally >geometry Just add wax anywhere it looks flimsy, or there's a sharp angle
I'd rather drive a yugo than that piece of shit
Just make it out of toobs dummy
>>28796733Absolutely based. There are no yugos here tho. And everyone aged 30-60 is completely consumed by consumerism
Trvth nvke:Plastic control arms are for crashworthiness, not cost cutting. They've engineered them to be weak in the lateral direction so that they break off during small overlap crash tests to send the wheel outboard and redirect the car instead of wedging the wheel into the footbox of the cabin.
>>28796699>plastic control armsholy fuck that's grim
>>28796766Refer to op pic for counterpoint
>>28796699>plastic control armswat
>>28796699>Make a mold out of the originalare you a child? Nigga we are at 3D scanning engineering automation now, with new tools and software- then feeding it straight to subtractive machining like multi-axis CNC.>how come noone's just casting their owndo you realize how retarded this statement is? Everyday folk do not have a foundry and machine shop in their garage, or have the time to do this shit, why would they?>If plastic control arms are such a big issueit isn't. Many modern engines now utilize high-strength and heat-resistive plastic. It isn't any different with some economy cars/utility vehicles and their suspension components. They aren't made for racing, so why do you need to change shit?
>>28796699Who’s using plastic control arms?
>>28796699Alloy CA's are just as retarded. Tesla uses them and they break constantly. >>28796859RAM. Yeah a truck of all things.
>>28796699>just make the same part with the same shape out of a different material without recalculating stresses or testingyou have never touched a graphing calculator in your life and you think FEA is just what your uncle calls your mom
>>28796699>If plastic control arms are such a big issue, how come noone's just casting their own out of aluminium?They are.Even MOOG and other 3rd parties are making steel and aluminum replacements for the plastic controll arms
>>28796699If the car came with plastic control arms it's not worth making aluminum ones for it since it's destined to sit in a carmax parking lot, aka it's built to rental specs.
>>28796986No point in doing fea if the material you're using is 100x stronger kek, dumbass wrenchlet.
>>28797095no point in replying to me if you're a STEMlet pleb
>>28797099>plastic goodStem these nuts dumbass ricer
>>28796853>subtractive machining like multi-axis CNC.Cause not everyone has a bucket, sand and a blowtorch, but everyone and their grandma has a cnc lmao
>>28796805But that pic shows literally exactly what he described?
>>28796703>Muh professhnuls can do it better than you>Where's your PhD scrub?>We wuz enginerz n shietMeanwhile the plastic ones are breaking left and right but somehow you don't see this as a problem.If cars are coming with plastic load bearing suspension parts from the factory then you can't assume anything the "engineers" did is up to scratch.
>>28796699Your're mom keeps a plastic arm by her bed, if you can catch my drift?
>>28797234The car in that photo didn't crash. I saw it happening-the wheel fell off at 10kmh, and there wasn't even a curb-just a 5cm high. The people on the right are the owners, the dude was screaming about "factory defect" and "compensation" for good 20mins
>>28797344If you're trying to troll, at least try to spell words to the best of your ability.I'm ESL(well, not second , more like fourth) and all these "you're" hurt my eyes
>>28797103He never said it was. The fact that you are entirely missing his point is just sad.
>>28797346lol troled
>>28797095>if the material you're using is 100x stronger kek, dumbass wrenchlet.100? Really?>Glass-filled polyester composites generally exhibit higher specific tensile strength (strength-to-weight ratio) than aluminum alloys, and their absolute tensile strength can be comparable to or even surpass some common aluminum grades.
>>28797477Yes, but direction matters, while aluminium is equally strong in all directions
>>28797591Why would you think isotropic moulded polyester resin wouldn't be? And all castings or moulding have a degree of non-isotropy due to material flow and welding after flowing round inserts, etc
>>28797592Statistics
People be tryin to reinvent the most pointless and stupidest shit imaginable and then autistically defend it despite being a redundant idea in the first place (assuming it's not just a cash grab) For example beyond plastic fucking suspension theres people trying to make keys not a thing, why? It's been a fucking thing for 1000s of years. Qualilty of life is deteriorating and too many people go out on a limb to justify actions that directly impact the little guy. What kind of lizard-bug-man do you have to be to play along with this shit? >>28796766Insurance agent must've typed this out because why fix your car for less when you can make an unfixable design and force the consumer to buy an entirely new car. Crash ratings my ass, if you're crashing like that then you have bigger problems than the fucking material your suspension is made out of.
>>28797643Meaningless in context
>>28797721I'm yet too see even a lada or yugo control arm just randomly give up
>>28797649>when you can make an unfixable design and force the consumer to buy an entirely new carif plastic control arms broke in a crash then metal ones would at least get bent. regardless they're going to have to be replaced, so wouldn't the plastic ones be cheaper to you fucking retard
>>28797344Its pronounced your're, it denotes ownership
>>28796699Hell when can we 3D-print cars and bypass the whole auto industry faggotry?Or a basic uber-cheap kit car that's still road legal, and drop in a V8, go hooning to your heart's content for under 15K
>>28797931Or just stop being poor.
>>28797821>BentVS>SNAPPEDyou're the fucking retard here buddy ol' pal. Stop shilling shit that fucks YOU over. You stupid fuck.
>>28798030not understanding value for money is precisely how you becpme poor
>>28797931Honestly I've been making parts out of nylon CF and they hold up
>>28797782False equivalence. I've seen a few cars whose lower control arm failed and the wheel was at right angles. You're conflating the material with the design and manufactured product - it's only one factor.Your argument (I assume it was you) was that aluminium was 100x stronger than plastic. I've disproved this, so now you're moving the goalposts. I've now pointed out that there can be many reasons for failure other than material, and failure in metal control arms is not unknown. You'll probably move the goalposts again but I'm not playing any more
>>28797931There is a reason why there is an auto industry to design and test products
>>28798444Nah, the 100x ain't me. Ik pure aluminium is roughly equivalent, alloys maybe x2 with arguably better fatigue resistanceThe main issue with plastic control arms is optimisation for failure-they are designed to fail after 3-5 years. Subsequently, there's no margin for error-even a defective overengineered part has a good chance to work for a long time.That's why casting the control arm out of an alloy, maybe with minor modifications is going to add a very healthy margin of overengineering, and, subsequently, lifespan
>>28796853how much does 3d scanning stuff like that cost?
>>28798037what sort of parts?
>how come noone's just casting their own out of aluminium?because the manufacturer should be doing it for me
