Recent content by kuleke

http://www.elpla.com/elpla_en/images/truss.gif That photo is what I had in mind (the dimensions are incorrect), I know how to find the internal forces, but I don't know how I'd optimise it and be able to predict its failure mode. I think the beam will be too difficult to construct and I also...

Please refer to the available dimensions of balsa I mentioned earlier, I'd like to know how you think I can construct the I-beam because I don't think it will be able to handle 200N at the center. Thanks

will it not be difficult to model/analyse this? I'm not very good with CAD/Simulation software :(

All dimensions are in N, mm and effectively Mpa. the bridge has to span at least 200mm so it doesn't fall through to the ground, we're allowed to analyze as though its a 2d structure since there are no components in the direction of the third axis as far as the majority of designs go(also makes...

http://www.elpla.com/elpla_en/images/truss.gif What I have is effectively that, I'm really stuck on how to optimize strength to weight and find the failing point (and possibly failure mode and location of failure). Also, I don't think that design is great. i chose it because they appear to...

Hello?? :confused:

The bridge failing completely. The idea is that all the components have the same chance of failure at the weight of 200N so it breaks down completely. We're trying to achieve a very high strength to weight ratio.

Allowed Dimensions: 2x2, 3x3, 4x4, 5x5, 6x6, 100x2, 100x3, 100x4, 100x5 and 100x6. They also have sheets but their dimensions weren't specified. We're only allowed balsa wood and glue. We require the structure to break at 200N, and the design has to make provision for the attachment of...

Hi, I need to design a balsa bridge that will cover a distance of 200mm. It will be loaded centrally for testing. The objective of this however is not to test until failure, but to have it fail at a certain weight. Points are also given for high strength to weight ratios and simplicity of the...

I'm trying to design an impact testing rig and i need to use the currently existing chemical explosion rig as one of the solutions alrady existing in my report. But i can't seem to find very much on this, any help would be greatly appreciated. thank you

So its definitely decided then, pneumatic systsms are the way to go. I'm going to need to put a spring in there cause i need the 'ram' to return to its initial position as quickly as possible after 'firing'. I'm not sure what materials make great springs but here is an idea of how stiff it...

Thank you everyone, I think I'm going with the compressed air idea now so I'm open to ideas regarding that. Please bear in mind that I won't have to actually purchase any of this stuff, I only have to design it.

Please tell me more about these calculations. I'm not familiar with the compressed air system at all. Also, I don't need to make any of it, I only need to design it and do the calculations. Thanks

Hydraulic systems problem, need help urgently I need to get an idea of what kind of forces one can get with real world hydraulic systems. I need to be able to deliver a huge force very quickly. The magnitude of the force should be enough to accelerate a 50kg cylinder to 22m/s over a distance of...