Challenge

week-11 Joint creation and Demonstration

G-drive link: https://drive.google.com/drive/u/0/folders/1S18pT4BTUAOJ-_CcfmpdcvvKG5dY2Guq

Simulation video link: https://drive.google.com/drive/u/0/folders/16dxW1p2dg8mwujoqqLEpOK45ycAKQg3g

Aim:

to create the various type of joints based on the ls dyna user guide

1.revoulte joints

2.spherical joints

3.cyclinderical joints

4.transational joints

Case-setup procedure

Introduction of joints

A pair is a joint of two elements that permits relative motion.when any two links or elements are connected in such a way that thier relative motion is completely or sucessfully constrained they called kinematic pair

type of kinematic pair

If a pair in motion has surface contact between the two elements it is called lower pair.such as a sliding pair ,turning pair and screw pairs lower pair
Ex:Nut and bolt,socket joint

if a pair in motion has a line or point contact between rtwo elements it is called higher pair
Ex:cam and fllower

type based on motion

Sliding pair is when two elements have sliding motion releative to each other it is known sliding pair
Ex:piston and cylinder
Rolling pair is when one elemnts is free to roll over other it forms rolling pair
Ex:a road roller rolling the ground
Spherical pair one link is constrained to swivel in or about fixed point it forms spherical pair
EX: a ball and socket
Turning pair(revoulte) when two elemnts are connected such that one elements revolves around the other.it forms a turning pair

Turning pair(revoulte)

part creation
sec craetion
- here we use the shell plate so, the element section is shell with t=1.5
mat creation
- we using the mat rigid proprty for this joints both fix and moving parts
Joints creation
- In revoulte joint the parts node should be conincident such example p1 havinh 1,2 nodes and p2 having 3,4 means the node number 1,3 and 2,4 should be conincident
boundary creation
- While creating the boundary the fix parts is all DOF is completely locked and moving parts id 1DOF translational based on Golbal co-ordinate sysytem
control creation
- Basic control and data base cards are added..

Simulation video:

2.spherical joints

RBE creation

Joints creation

Simulation video:

3.cyclinderical joints

Above same procedure for all but the constraints only may change but the joints which allow both rotational and translational

RBE creation

Joints creation

Simulation video:

4.transational joints

Above same procedure for all but the constraints only may change but the joints which allow translational

RBE creation

Simulation video:

Conculsion

in this assignment we learn the various pair of joints and it motion
we learn the how create the cnrbe node and how to assign node for particular joints

Ship work like this
in your own course.