Week 3 Verification of Weld Joints
OBJECTIVE: TO SIMULAET DIFFERENT TYPES OF WELDING USING 3 DIFFERENT WELDING MATERIALS AND FIND THE DIRECTIONAL DEFORMATION AND EQUIVALENT STRESS DEVELOPED IN EACH CASE AND THE WELD JOINT WITH MAXIMUM EQUIVALENT STRESS IN EACH CASE.
CASE SETUP AND EXECUTION:
THE CAD MODEL REQUIRED FOR THE SIMULATION IS LOADED IN THE SPACE CLAIM AND VERIFIED.
MATERIALS USED FOR VARIOUS CASES ARE:
IN THE CONNECTIONS , PRE-EXISTING AUTOMATICALLY GENERATED CONTACTS ARE SUITABLE MODIFIED FOR FRICTIONAL AND BONDED CONTACTS. CONTACTS OF RIBS WITH PLATES AND PLATES WITH PLATES ARE SET AS FRICTIONAL CONTACTS WHEREAS CONTACTS OF ANY ELEMENT WITH THE WELD JOINTS ARE TREATED AS BONDED JOINT CONTACTS.
MESHING IS DONE SEPERATELY FOR THE PLATES AND OTHER ELEMENTS. PLATES ARE GIVEN A FINER MESH BY USING BODY SIZING FEATURE.
THE BIG PLATE IS FIXED BY USING FIXED JOINT FEATURE ON THE FIVE HOLES IN IT.
A STATIC FORCE OF 15000 N IS APPLIED ON THE INNER FACE OF THE RECTANGULAR SLOT IN THE LOWER PLATE.
CASE 1:
IN THIS CASE ALL THE ELEMENTS ARE PERSUMED TO HAVE STRUCTURAL STEEL AS THEIR MATERIAL. ALL OTHER PARAMETERS REMAINING THE SAME AS MENTIONED ABOVE.
RESULTS OF CASE 1:
AND THE WELD WITH MAXIMUM EQUIVALENT STRESS IS SHOWN BELOW;
CASE 2:
IN THIS CASE WELD JOINT MATERIAL IS SELECTED TO BE ALUMINIUM ALLOY. OTHER PARAMETERS REMAINING THE SAME AS THE LAST CASE.
RESULTS OF CASE 2:
THE WELD WITH THE MAXIMUM EQUIVALENT STRESS IS SHOWN BELOW;
CASE 3:
IN THIS CASE BRONZE IS USED AS THE MATERIAL FOR WELDS AND PLATE MATERIAL IS TAKEN TO BE STRUCTURAL STEEL AND RIBS MATERIAL IS TAKEN TO BE COPPER.
RESULTS OF CASE 3:
THE WELD WITH THE MAXIMUM EQUIVALENT STRESS IS SHOWN BELOW;
CONCLUSIONS:
FROM THE RESULTS SHOWN ABOVE IT IS VERY CLEAR THAT MAXIMUM DEFORMATION WAS OBSERVED IN THE CASE 3 WHERE BRONZE WAS THE WELD MATERIAL AND COPPER WAS THE MATERIAL OF RIBS.
ELASTIC STRAIN WAS OBSERVED TO BE MAXIMUM IN THE BOTTOE PLATE IN FIRST CASE BUT IN THE OTHER TWO CASES IT WAS OBSERVED TO BE MAXIMUM AT ONE OF THE BOTTOM WELDS.