- #1
dovidu
- 22
- 0
----------------Q 1---------------------
hello it's been two weeks to figure out how much force would it take to break a granite surface plate size of
1) 30x30x8 (cm)
2) 40x60x8 (cm)
literally breaking it in half with a fulcrum underneath and two forces acting on the top
i've posted a number of forums (practical machinist, engineering forum, hobby machinist forum, etc, etc)
all the replies either "refer to your mechanical engineering textbook", "consult a mechanical engineer", use H-beam strength calculation formula, etc.
never a direct answer but beat around the bush type.
i've done my calculation based on the cross section of the granite:
UTS of granite 25~39MPA therefore 25~39 X 240/320 = 6000~9360 / 8000~12480 MPA
which translates to 61182.97~95445.44 / 81577.3~127260.58 kg
seems pretty good not sure if it's correct
----------------Q 2---------------------
also i assumed that as the distance of two forces acting upon the granite increases, proportionally the required force to break the granite decreases
so in order to counter that, using two metallic plates bolted on the surface plate directly beneath the two forces that would direct the force closer to the fulcrum, would it act as a transmitter that brings the two distant forces closer to the fulcrum?
please, i don't want beat around the bush type of answer
thank you :D
hello it's been two weeks to figure out how much force would it take to break a granite surface plate size of
1) 30x30x8 (cm)
2) 40x60x8 (cm)
literally breaking it in half with a fulcrum underneath and two forces acting on the top
i've posted a number of forums (practical machinist, engineering forum, hobby machinist forum, etc, etc)
all the replies either "refer to your mechanical engineering textbook", "consult a mechanical engineer", use H-beam strength calculation formula, etc.
never a direct answer but beat around the bush type.
i've done my calculation based on the cross section of the granite:
UTS of granite 25~39MPA therefore 25~39 X 240/320 = 6000~9360 / 8000~12480 MPA
which translates to 61182.97~95445.44 / 81577.3~127260.58 kg
seems pretty good not sure if it's correct
----------------Q 2---------------------
also i assumed that as the distance of two forces acting upon the granite increases, proportionally the required force to break the granite decreases
so in order to counter that, using two metallic plates bolted on the surface plate directly beneath the two forces that would direct the force closer to the fulcrum, would it act as a transmitter that brings the two distant forces closer to the fulcrum?
please, i don't want beat around the bush type of answer
thank you :D