Bursting strength and compressive strength of cardboard tubes

[LT72884]

Ok, i have been searching the google for about an hour and have come up dry. I am trying to either test at home or find some actual numbers for how much inner pressure a thin walled (3mm) cardboard tube take before it bursts? IE like filling it with water and then it pops.
Second, im looking for numbers for how much weight the side of the same cardboard tube can handle like squishing it like a water bottle from the sides. IE cardboard tube is laying on its side and weight is loaded onto it. This one i could do at home, BUT i only have one tube and its much needed for something else so i can ruin it.

Just wondering if someone has any numbers for me:)

thanks in advanced

 

[Baluncore]

I think the first part can be answered by knowing the tensile strength of the cardboard. A tube is often made from a strip wound in a helix, because internal pressure tends to split along the length of the tube, and the seam would make a weak point.

The second question is more difficult, there will be an initial increasing deflection, but that will be followed by a collapse when the cardboard folds.

 

[jrmichler]

After working in a paper mill for ten years, a company that makes the machines to make cardboard for five years, then 16 years for a company that makes paper converting machinery, I can tell you the answer. Paper properties vary widely. The mechanical properties of a piece of paper depend on the type of fiber, how well the fibers are bonded, the average directions of the fibers (paper properties vary with direction), the density of the paper, the total thickness, and the bonding of the layers.

There are no standard published mechanical properties for paper, so you have to measure it yourself. Measuring allowable side loading should be possible if you limit the maximum deflection to the elastic range. Skill is required to do this.

 

[LT72884]

After working in a paper mill for ten years, a company that makes the machines to make cardboard for five years, then 16 years for a company that makes paper converting machinery, I can tell you the answer. Paper properties vary widely. The mechanical properties of a piece of paper depend on the type of fiber, how well the fibers are bonded, the average directions of the fibers (paper properties vary with direction), the density of the paper, the total thickness, and the bonding of the layers.

There are no standard published mechanical properties for paper, so you have to measure it yourself. Measuring allowable side loading should be possible if you limit the maximum deflection to the elastic range. Skill is required to do this.

Perfect. I will see if i can test it at home and go from here. this does help me a lot believe it or not. thanks for the information