Cybertruck Trailer Hitch/Casting Failure @10,400 lbs *VERTICAL LOAD*

[Electric Metal]

Welp, this isn’t how, towing, or trailers, or loads work; but, it’s not going to help things, is it?

The maligning of this vehicle shows no signs of stopping or slowing down.

If Tesla wants to put this to rest, they’re gonna have to do something more about it than tweeting, I think.

I don’t even watch this idiots posts. His voice is overly annoying and monotone. Don’t waste your time.

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[Cyberbeard]

I saw in the comments that the Ram did better and didn't break. It's being publicized as a negative on the CT. I assume there's a video I'll watch later

Edit: I found the video. Most comments are asking if Tesla will fix this as it shouldn't break with a static load like that. They are saying it's confirmation of Whistling Diesel's videos.

That dude is a major Elon hater!.. always pushing his political views on X... He's fear-mongering people into believing that the CyberTruck can't tow 10,000 lbs and making it seem it's a danger on the road

 

[Ri22]

Elon hater or not, You can't test ridiculous situations and consider ridiculous results to be valid. That being said metal fatigue with cast aluminum is a real thing and quite concerning. Which this video is not testing But jerry is quickly becoming a "click whore"

 

[cybercricket]

Elon hater or not, You can't test ridiculous situations and consider ridiculous results to be valid. That being said metal fatigue with cast aluminum is a real thing and quite concerning. Which this video is not testing But jerry is quickly becoming a "click whore"

Is metal fatigue specific to cast aluminum ?

 

[Bill W.]

Isn't this the same moron that shot up a CT with a 50 cal for views?

 

[mongo]

Is metal fatigue specific to cast aluminum ?

Aluminum in general has it, steel doesn't.

 

[Ri22]

Is metal fatigue specific to cast aluminum ?

No all metal can fatigue but CA is hard and does not bend or deflect very much so it will start to develop micro cracks then big ones, steel does bend and flex a lot more. Proper engineering can remedy this. Just concerned that they properly tested (not just computer tested) after the aero cover fiasco

 

[Ri22]

Aluminum in general has it, steel doesn't.

Steel is an alloy (aluminum used like this is too) it can be fatigued. Stainless is Ferritic and one of the steels most prone. But other alloys are better

 

[cybercricket]

Aluminum in general has it, steel doesn't.

I suspect what you're referring to is the Fatigue Limit. Aren't we talking about loading in excess of the rated limits though, thus the Fatigue Limit would likely be exceeded even for steel ?

 

[mongo]

I suspect what you're referring to is the Fatigue Limit. Aren't we talking about loading in excess of the rated limits though, thus the Fatigue Limit would likely be exceeded even for steel ?

Yeah, steel has an endurance limit point whereas aluminum (typically?) doesn't. Maximum strength margin vs real word load determines cycle life. For steels, it may hit yeild before the fatigue limit (50%ish tensile). But I'm no Mechanical Engineer.

Real world load is driven by the dynamic loads moreso than static (assuming people exercise due care rolling equipment onto the trailer). Test limits are ~6k for an 11k trailer.

 

[65SoYoLO]

Isn't this the same moron that shot up a CT with a 50 cal for views?

one shot with a 50 cal. He has some great videos but now I put him in the whistling diesel category. Phony a-hole.

 

[cybercricket]

Yeah, steel has an endurance limit point whereas aluminum (typically?) doesn't. Maximum strength margin vs real word load determines cycle life. For steels, it may hit yeild before the fatigue limit (50%ish tensile). But I'm no Mechanical Engineer.

Real world load is driven by the dynamic loads moreso than static (assuming people exercise due care rolling equipment onto the trailer). Test limits are ~6k for an 11k trailer.

Either way general fatigue seems to be a bit of a red herring considering air frames are largely made out of aluminum alloys and are subjected to continuous dynamic loads.

 

[JackCypher]

I get the inherent issue with Carbon Fiber, but what's the problem that is inherent to cast aluminum ?

Cast metals are extremely strong in compression, however, nothing even compares to ductile iron/steel, it essentially has a nearly infinite resistance to stress / strain cycles. This is why it is used in deep sea vessel hulls.

Even back in the early 1900's they knew steel performed better in uses where there was both pulling and pushing forces. [Tension and compression]

This is why most truck frames are made of steel, as it can take a very high number to compression and tension cycles and not break...

Rarely do you see broken truck frames....even in the junkyard.

I think the material choice for the CT *could* be a compromise, however, it would take 10's if not 100's of years of towing use to actual compromise the aluminum.

Regards
Jack
PS: I am make generalizations!..There is lots of published data on this.

 

[cybercricket]

Cast metals are extremely strong in compression, however, nothing even compares to ductile iron/steel, it essentially has a nearly infinite resistance to stress / strain cycles. This is why it is used in deep sea vessel hulls.

Even back in the early 1900's they knew steel performed better in uses where there was both pulling and pushing forces. [Tension and compression]

This is why most truck frames are made of steel, as it can take a very high number to compression and tension cycles and not break...

Rarely do you see broken truck frames....even in the junkyard.

I think the material choice for the CT *could* be a compromise, however, it would take 10's if not 100's of years of towing use to actual compromise the aluminum.

Regards
Jack
PS: I am make generalizations!..There is lots of published data on this.

I am a bit skeptical of these claims. First of all, I believe the main deficiency of the aluminum alloys is in the alloys themselves (well-pronounced grain structure) and not the method of how these alloys are used (cast vs extrusion), even if post-processing does improve overall strength. Many things are made out of steel because of steel's abundance and favorable qualities in fabrication / manufacturing context. Tesla has been "reinventing the wheel" here and does have a defensible position as to why they picked aluminum.

 

[mongo]

Either way general fatigue seems to be a bit of a red herring considering air frames are largely made out of aluminum alloys and are subjected to continuous dynamic loads.

Yeah, the testing they did would have revealed issues. I'm coming at it from the angle that you need the margin to total failure to have that cycle life.

Regading airframes, those undergo a lot of inspections to prevent Aloha Airlines Flight 243 type incidents.

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