Home |
Search |
Today's Posts |
|
Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to rec.crafts.metalworking
|
|||
|
|||
Screws: Shear vs. bending vs..... pullout??
Awl --
If you screw a screw tight to a plate connecting to a base plate, it is more-or-less in pure shear (no bending moment, unless the screw is cantilevered). What is the pullout/thread stripping process called? And actually, those two processes would be distinct as well, correct? Do they have proper names, or is pullout and thread stripping close enough? -- EA |
#2
Posted to rec.crafts.metalworking
|
|||
|
|||
Screws: Shear vs. bending vs..... pullout??
"Steve W." wrote in message
... Existential Angst wrote: Awl -- If you screw a screw tight to a plate connecting to a base plate, it is more-or-less in pure shear (no bending moment, unless the screw is cantilevered). What is the pullout/thread stripping process called? And actually, those two processes would be distinct as well, correct? Do they have proper names, or is pullout and thread stripping close enough? http://www.appliedbolting.com/pdf/yielding.pdf http://school.mech.uwa.edu.au/~dwrig.../home.html#top http://www.boltscience.com/index.htm http://www.roymech.co.uk/Useful_Tabl...reloading.html Dayum..... I shoulda stayed in school..... LOL So what's the diff between "tightening" a g-d screw, and "pre-tensioning" it?? -- EA -- Steve W. |
#3
Posted to rec.crafts.metalworking
|
|||
|
|||
Screws: Shear vs. bending vs..... pullout??
On May 14, 10:18*pm, "Existential Angst" wrote:
So what's the diff between "tightening" a g-d screw, and "pre-tensioning" it?? -- EA If you need to get all the strength you can from bolts, then you use some system that allows you to accurately know the bolts are correctly tensioned. Torque wrenches are better than nothing, but you can use things as belleville washers and be more accurate. Dan |
#4
Posted to rec.crafts.metalworking
|
|||
|
|||
Screws: Shear vs. bending vs..... pullout??
"Existential Angst" wrote in message ... ... So what's the diff between "tightening" a g-d screw, and "pre-tensioning" it?? -- EA You tighten to a head torque, pretension to a stress level in the bolt shank and threads which can be measured as elongation if both ends are accessible. The difference is compensating for friction. jsw |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Shear strength of screws | Woodworking | |||
Why does my snow blower not shear the shear bolts? | Home Repair | |||
storage pullout | Woodworking | |||
pullout kitchen faucet with filter? | Home Repair | |||
FS: Roper Whitney Kick Punch, Circle Shear, Libert Shear | Metalworking |