Weld sequence optimization with ABAQUS welding interface Mahyar Asadi will present on the following at the SIMULIA technology day in Toronto OCT 18, 2017 Welding engineering is among one of the complex fields that has historically relied on the past experience of welding engineers. The Abaqus Welding Interface (AWI) places an emphasis on the ease of weld model preparation and setup while supporting options and features that allow realistic predictions of quantities of interest such as distortion and residual stresses. A flux-based energy input option using the Goldak double ellipsoid model is now available for use with.
Home > News > Weld sequence optimization with Abaqus Welding Interface. Shows how the capability of modeling and simulation helped weld engineers for critical assessment of a series of cracked welds. A third example will be on the assessment of retrofit options, for a welded structure containing cracks that developed after initial welding. Abaqus Unified FEA is the leading finite element. Diagnose, and visualize advanced Abaqus analyses. The intuitive interface. Or crack propagation in.
ABAQUS Welding Interface - Minimum Temperature less than Predefined Field
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ABAQUS Welding Interface - Minimum Temperature less than Predefined Field
I am using the ABAQUS Welding Interface. When I run the analysis, as the weld is deposited, the elements heat up to prescribed 1500degC, however close to the heat application, some elements go down to -140 degC. Over the entire analysis, the -140 degC increases and at the end of the analysis reaches 21degC. Similarly heated elements start at 1500degC and reach 21degC at the end as prescribed. The heat transfer through the body is definitely affected by the -140degC.
All predefined fields are set to 21.1 degC including initial base temperature. Temperature dependent properties, constants, etc are all dimensionally consistent..
Could it be the mesh is not fine enough? See attached.
Thanks!
UPDATE: I removed all temp dependent properties as a test and still has a similar result with elements dropping below the pre-defined field.
UPDATE 2: I noticed my temp dependent properties went up to 1400 degC but temp application of 1500 degC. I applied temp of 1400deg C but still same results with elements dropping below pre-defined temperature field.
All predefined fields are set to 21.1 degC including initial base temperature. Temperature dependent properties, constants, etc are all dimensionally consistent..
Could it be the mesh is not fine enough? See attached.
Thanks!
UPDATE: I removed all temp dependent properties as a test and still has a similar result with elements dropping below the pre-defined field.
UPDATE 2: I noticed my temp dependent properties went up to 1400 degC but temp application of 1500 degC. I applied temp of 1400deg C but still same results with elements dropping below pre-defined temperature field.
Abaqus Welding Interface (NSRP M&S 2)
Enables up - front realistic simulation of welded structures
Abaqus Welding Interface (NSRP M&S 2)
Enables up-front realistic simulation of welded structures
Overview
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Traditional consumable welding is a very common manufacturing method. But these common welding methods are also associated with a few expensive and sometimes undesirable processes such as flame straightening, weld testing, or trial and error with fixturing and path sequencing. All of these processes require time and materials, which ultimately results in added cost.
As part of the National Shipbuilding Research (NSRP) M&S 2 Project, Dassault Systèmes SIMULIA has developed a virtual welding application, called Abaqus Welding Interface (AWI), which provides the ability to virtually model the welding process and predict weld distortion and residual stresses. The result is reduced need for time-consumingphysical tests and manual corrections because SIMULIA tools predict if a given welding process/sequence will work.
Virtual Welding Highlights
Easy Modeling of the Welding Process
Automation of repetitive, time-consuming tasks:
1. Welding specification
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2. Weld Pass specifications
3. Thermal loading conditions
4. Structural loading conditions
Thermal Results Correlate with Experimental Results
Predicted temperature results (shown in the charts) compare reasonably well with the experimental data reported in the reference:. S. Murugan, P.V. Kumar, B. Raj, M.S.C. Bose, Temperature distribution during multipass welding of plates, International Journal of Pressure Vessels and Piping 75 (1998) 891–905.
Weld Distortion and Residual Stresses Are Easily Obtained from Thermal Loading
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1. Review stress and strains
2. Review displacements
3. View other contour plots
Features & Benefits
- Automate time consuming tasks associated with building a weld model.
- Set up custom weld pass sequence or let plug-in automatically define.
- Easily create all the required analysis steps with appropriate data, the energy transport boundary conditions for each step, and the sets for sensor output requests (where applicable and available).
- Build the entire thermal model followed by the automatic generation of the corresponding mechanical model for thermal stress analysis.
- Modify and optimize the process before any actual material is welded.
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