MODEL WITH STIFFENERS Gravity Total Mass of Stones
- Slides: 23
MODEL WITH STIFFENERS Gravity Total Mass of Stones 2231 kg Stones radius=0. 15 m (mass 38. 2 kg each) Slab (mass 92 kg) Stones radius 0. 1 m (mass 11. 3 kg each) Hopper Bucket Stiffeners Mobile Sled X Direction only Springs between Tray and Sled
MODEL WITHOUT SLED
MODEL WITHOUT STIFFENERS
CONTACT SLAB TO HOPPER Slab Hopper
CONTACT SLAB TO BUCKET Slab Bucket
HOPPER BOUNDARY CONDITION – FIXED X-Y-Z Hopper
HOPPER GATES - HINGE NODES Hopper Gates Hinge Nodes
HOPPER GATES CLOSED NODES 0 -0. 5 sec Hopper Gates Closed nodes From 0 to 0. 5 secs
PRESCRIBED X MOTION OF TRAY – NODES ID Hopper fixed Node(typ) X direction only
SLED X DIRECTION MOTION CURVE No motion for 0. 5 sec
SIMULATION 0 to 1. 0 s Hopper filling with stones Stones settling in hopper Tray starts to move (0. 5 s) Gates open at 0. 5 s and stones fall into tray Stones impact tray
SIMULATION 1. 15 s to 2. 01 s Slab impacts tray
SCENARIOS INVESTIGATED SCENARIO BUCKET YIELD STRENGTH STIFFENERS SLED SUSPENPION MOVING A 250 MPa YES LIGHT B 250 MPa NO YES LIGHT C 250 MPa YES NO LIGHT D 250 MPa YES HEAVY Bucket Stiffeners Sled Spring
SCENARIO A CONTACT FORCES BETWEEN SLAB STONES AND BUCKET Hopper Stones Slab Bucket Stones contact bucket No contact between slab stones and bucket Slab contacts bucket
CONTACT FORCE BETWEEN SLAB AND BUCKET SCENARIOS INVESTIGATED SCENARIO BUCKET YIELD STRENGTH STIFFENERS SLED MOVING SUSPENSION A 250 MPa YES LIGHT B 250 MPa NO YES LIGHT C 250 MPa YES NO LIGHT D 250 MPa YES HEAVY Tray stationary scenario
CONTACT FORCE BETWEEN SLAB AND BUCKET SCENARIOS INVESTIGATED SCENARIO BUCKET YIELD STRENGTH STIFFENERS SLED MOVING SUSPENSION A 250 MPa YES LIGHT B 250 MPa NO YES LIGHT C 250 MPa YES NO LIGHT D 250 MPa YES HEAVY
CONTACT FORCE BETWEEN STONES AND BUCKET SCENARIOS INVESTIGATED SCENARIO BUCKET YIELD STRENGTH STIFFENERS SLED MOVING SUSPENSION A 250 MPa YES LIGHT B 250 MPa NO YES LIGHT C 250 MPa YES NO LIGHT D 250 MPa YES HEAVY
VON MISES STRESS @EID SCENARIOS INVESTIGATED SCENARIO BUCKET YIELD STRENGTH STIFFENERS SLED MOVING SUSPENSION A 250 MPa YES LIGHT B 250 MPa NO YES LIGHT C 250 MPa YES NO LIGHT D 250 MPa YES HEAVY Tray settling on suspension not moving Tray moving and stones falling Impact of stones on tray
VON MISES STRESS @EID Tray moving with stiffeners Tray moving no stiffeners Tray stationary with stiffeners
Y DISPLACEMENT @NID No stiffeners Tray not moving
Y DISPLACEMENT @NID
Y DISPLACEMENT @NID
Y DISPLACEMENT @NID