Boeing 787 Composite panel demonstration

Boeing demonstrates the strength of a composite panel from the 787 with the help of a big hammer...

Category:

Autos & Vehicles

Tags:

• Boeing
• 787
• composite
• panel
• demonstration

[GoogleEqualsEvil]

This is very deceiving. GFRP does not "dent". I'm sure they know this but are counting on non-engineers to not know. GFRP is very strong and stiff for it's weight, but also very brittle. What they aren't showing you is the micro-cracks that surely developed internally from the impacts. And they're almost always impossible to see with the naked eye. GFRP and other composites have some great qualities and work fantastically well for certain applications. But when they fail they crack / shatter.

[guitarsandampsguy]

Just as frustrating is the glaring inability of so many people to actually listen to what is being said. Nowhere does Mr. Weldon say C/G composites shouldn't be used on aircraft. What he said is that he believes that a C/G composite fuselage for a commercial airliner requires more testing and development, especially in regard to it's lack of toughness (ability to absorb impact) and how that will affect crashworthiness. As an engineer myself I view that as very sound engineering judgement.

[karpiu121]

I wonder if those guys ever heard about delamination and its consequences...

[riff42]

Disclaimer: I work at the leading composite research group in the world, center of excellence for all branches of the military, along with having Boeing, and other aircraft manufatures come to US for help.

1: Carbon fiber and Graphite fiber are almost the same thing. One is 99% carbon, the other is 99.99% carbon. @davetileguy, give up, you are an idiot. Don't discount the composite professionals here that have 20x better grammar than you.

2: boat panels are nothing like aircraft stresses

[davetileguy]

@GoogleEqualsEvil Why don't inferior polyester boat panels delam after spending a life time being pounded and run up on the beach? (just asking)

[GoogleEqualsEvil]

@davetileguy Epic fail. I'm not upset at all. I'm just tired of people like you speaking on a subject as if you're an authority, when the truth is that you clearly have no idea what you're talking about.

It's a scary thought to think an arrogant tool like you is actually fabricating / repairing the composite components that I design, engineer, and develop. As scary as watching the clowns in this video bang on a composite panel thinking that they are proving it's "tough".

[davetileguy]

@GoogleEqualsEvil suure you do ,you just think graphite and CF are the same ?, black stringy stuff,Tile is what I used to do I went school and now repair the materials made in the Seattle area your so arrogantly familiar with, I stated the truth which is why your upset.

[GoogleEqualsEvil]

@davetileguy You truly are an ignorant moron. You have absolutely no idea what you're talking about. Stick to laying tile and leave the aerospace and mechanical engineering to qualified professionals like myself. I have over 30 years of design and engineering experience (along with a BSAE and MSME) in both the aerospace and commercial industries. That includes a large amount of experience with composites, including graphite / carbon fiber reinforced composites.

[davetileguy]

@GoogleEqualsEvil How well did NDT work on the Aloha flight ?

[davetileguy]

@GoogleEqualsEvil Carbon fiber is a form of graphite in which these sheets are long and thin. You might think of them as ribbons of graphite. Bunches of these ribbons like to pack together to form fibers, hence the name carbon fiber. If you know so much than call it by it's correct name . Birch and Cedar are "wood" they are not the same. There are no NDT standard because their all used differently for different reasons ,Delam,water,cracks,voids,side­,access,top bottom.

[GoogleEqualsEvil]

@davetileguy Graphite IS "Carbon Fiber". I'm more than qualified to speak on the subject. NDT is very expensive to use on an overall, continuous basis. But I would highly recommend that Boeing institute a standard NDT policy that is enforced by the FAA for inspection of every 787. But that will never happen because of the economics involved.

[GoogleEqualsEvil]

@davetileguy Even if this is Kevlar based composite instead of Graphite (Kevlar composite is significantly tougher than Graphite based composite), it still can be (and likely was), damaged internally from the impacts shown. That kind of internal damage may take years to show up, and since it is so hard to detect visually, likely would go unnoticed unless inspected by appropriate NDT. Ask Boeing to show an Ultrasound, X-Ray and Thermographic inspection of this panel.