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the load will be hung from the middle point, it's going to be bricks . the minimum height is to be 12cm, minimum length is to be 56cm, minimum area of cross section is 288cm^2 it can have a floor . the point is is it better to support it with the 2 blocks or should I increase the radius ?

let me clarify, I'm working on a project where I'm supposed to make a prototype for a tunnel made up of recycled materials that can withstand load up to 15kg, and its maximum deflection shouldn't exceed 1 cm so the only forces acting on the prototype will be the weight the length of the...

but why the curve makes a problem ? " Actually I need a scientific base so I can put it in my research paper "

" That's what I mean by supporting the semi-cylinder with two blocks in the form of cuboid underneath

Ok so as an engineer if you were to choose between constructing an object made up of straight lines ( cube, cuboid, etc.. ) or constructing an object that is made up of curves ( cylinder, sphere, etc .. ) which one would be easier to do and less consuming to the materials ? if the design you're...

yes but will it increase the tensile strength or it will be affected ?

after researches it turned out that hdpe is a good material that can hold load, waterproof and doesn't react with a lot of chemicals , the minimum used materials should be 2 and they both should be polymers so we must add something to hdpe and if we must add something to it better be something...

If we add anything it will be during melting it in order to mix them together

well we thought about talc but it turned out that they need a polymer and talc isn't so we don't know what to do

Evening or morning I don't really know, anyway we're supposed to make a small prototype of a tunnel from polymers that can hold up to 15kg , as we've selected HDPE as a material but we need something else with it so what could be added in order to increase the strength of it in the form of...