Crumple zones in Hilux

Redback

....the fact that it has crumple zones is a good thing,......
You been brainwashed too , Is it any wonder the road toll rises , why more people get severely injured and or trapped in the vehicle requiring to be extricated , when the car crumples alright, right in on them , give me the oldies any day , And before you type some logical answer think about the Crumple zones in the V8 Supercars, the speeds at which they hit , wouldn't be any drivers left if they had bloody crumple zones ,

If you look at any race car, it's the cab that has all the strength and reiforcing, the rest of the car is designed to ABSORB the impact (ie) "crumple zone"

Baz.

This quote is stolen, plagiarised and otherwise copied from a Land Rover forum.

"In a Land Rover the other car is your crumple zone"

Cheers,

Russ.

Doug T, you obviously didn't see the V8s from Pukekohe NZ on the weekend. If you had, you wouldn't have failed to notice the severe back end damage suffered by the car driven by Jack Perkins. The rear was compressed back up to the rear window line. If that isn't a crumple zone - what is it? It left the cabin/driver's compartment intact, driver not injured. CRUMPLE ZONE obviously did the job. Mate if you are unfortunate to be involved ina serious prang one day and you survive, you'll probably owe it all to the modern design and inbuilt crumple zones of your vehicle. Stop spreading rubbish about safety.

Doug,

Sorry mate your argument is not quite right, having crumple zones isn't the reason why the road toll increases.

Quite simply they do save lives, they absorb the energy involved in an accident.

We could easily demonstrate if we were both prepared to right off our cars, but we don't have to because the car manufacturers have already done it for us.

If you hit a solid object i.e. a very big tree in a car with no crumple zones all the energy of the impact will be absorbed by the passengers as they decelerate from whatever speed the vehicle was travelling at to zero.

If you hit the same solid object at the same speed in a car with crumple zones some of the energy from the deceleration will be absorbed by the crumple zone, and any remaining energy will be abosrbed by an air bag, then the passenger will get the rest.

If there is another vehicle involved then the one with the least inertia (weight and speed) will cop most of the impact.

From my own experience I can support the effectiveness of crumple zones. I hit a hidden tree stump in my Landcruiser at about 15-20kmh and my head went through the windscreen. Many years later I hit a different tree stump at about 20kmh in a modern car and the bumper and panels behind took and awful pounding but I was hardly moved in my seat.

Oh Russ, the landrover thoery doesn't work if it's a tree, a bridge or a truck.

Steve.

Yeah, I know Steve. The tongue was very firmly in the cheek for that reply. Mind you, in all my years of 4WDing, I've never taken on a tree trunk! Well except this one time where the tree trunk was just 30cm high and I ended up on top of it with all four wheels off the ground. lol.

"You been brainwashed too , Is it any wonder the road toll rises , why more people get severely injured and or trapped in the vehicle requiring to be extricated , when the car crumples alright, right in on them , give me the oldies any day."
The road toll is at its lowest since about 1945 or so (nsw). they now cut people from cars as they are alive to do so , in the good old days the crumple zone was the human body. Go speak to any Ambo or Cop or tow truck driver who remembers the good old days and listen to what they say about the trauma they saw before crumple zones became part of vehicle design.

DIO, You don't watch your racing very carefully!! Paul morris survived a double flip, and survived by the roll cage, which makes the cock pit rigid construction no crumple zone there!!, If there was the roof would have pushed his head through the race track!! I don't think Doug is talking rubbish at all??.

Axle.

Doug,

The purpose of crumple zones is to slow down the deceleration.
Here's the logical answer you were waiting for. It's basic high school maths.

Say a car traveling at 60km/h hits a tree.
A rigid car decelerates from 60km/h to 0km/h in 0.1 seconds.
A car with crumple zones decelarates from 60km/h to 0km/h in 0.5 seconds.

During the crash the driver and passenger hit the steering wheel and dash with their bodies and absorb the force.

Now, 60km/h is 16 m/s.
In a rigid car, to decelarete from 16m/s to 0m/s in 0.1 sec you have a decelaration of 160m/s2.
Force = mass x acceleration
Force = 80kg (person) x 160m/s2
Force = 12 800 N (1280 kg)

In a car with crumple zones, the deceleration from 16 to 0 happens in 0.5 sec
So, deceleration = 32m/s2
Force = mass x acceleration
Force = 80 kg x 32 m/s2
Force = 2560 N (256 kg)

See, the differance is HUGE. If the human body can withstand a force of 3500N (350kg), then you can walk out of the car which has crumple zones, or you get scraped off the dash in the rigid car and placed in a wooden box.

R.

Agree 100% Richard. I still think that the manufacturers could design better hard points to attach items like bars, hooks, winches, etc. Aust. NZ and SA seem to be the only countries where people tow trailers these days. Crumple zones and air bags make it very difficult to attach our usual add-ons.

well said

LOL best comment I've ever read on the forum :))))))

Gramps! You just keep popping up when the humour starts. :))))))).

Axle,

Hahahaha Redback beat me to it. Sometimes there's just too many serious folk on here :)))))

If its that bad its a stat write off and its unable to be re registered so there is not point in fixing them

Last time I drove my old Camira into another car (yes I was a bit younger at the time) I manged to do some serious damage to the front end and as a consequence it was written off. After asking the panel beater about it I was told that in Vic. it is at the least a frowned on practice requiring a full engineers cert. on the job and at worst in now illegal. So it is no wonder that Toyota require a new chassis for the Hilux not just fitting a new section (I imagine there could also be untold stress point caused in the rest of the assembly to say the least).