Spot Welding

Purpose:

This interface is used for generating spotweld elements from a file containing hundreds or thousands of weld locations, and can generate both solid and beam type 9 spotweld elements, in doing so automatically creates the following keywords: *PART, *SECTION, *SET_NODE, *SET_PART, *MAT_SPOTWELD, *HOURGLASS, and *CONTACT_SPOTWELD.

Function:

Sample:

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Dialog:

  • Open: Load spotweld file.

  • Primer : Select spotweld file format(Primer, Master Weld File, XML, Custom).

  • Unload WF : Delete weld info. Weld elements will NOT be deleted.

  • Search radius : Radius to search for elements to connect with weld element.

  • Min Length : Min length for weld elements.

  • : Display weld data.

  • : Display welds which will be smaller than Min Length.

  • : Display welds which will fail being created.

  • : Display welds which will be sucessfully created.

  • : Display welds which have been successfully created.

  • Beam : Create Beam element for the welds.

  • Solid : Create Solid element for the welds.

  • One Elem : Enter x/y/z-coordinates of minimum and maximum point.

  • Four Elems : Enter number of elements along x/y/z.

  • GUI : Set properties from GUI.

  • File : Set properties from file.

  • Constant : Constant diameter for weld.

  • Curve ID : Diameter as function of min sheet thickness (DEFINE_CURVE ID).

  • Built-in: Diameter = 5.*sqrt(min_thickness).

  • Mat. Properties: Set material properties.

  • Create : Create spotweld.

  • Reject : Reject the previewed spotwelds.

  • Accept : Accept the previewed spotwelds.

  • Done : Exit spotweld generation interface.

Mat.Properties

  • RO : Density.

  • E : Young's modulus.

  • PR : Poisson's ratio.

  • SIGY : Initial yield stress.

  • ET : Hardening modulus.

  • DT : Time step size for mass scaling.

  • TFAIL : Failure time if nonzero.

  • EFAIL : Effective plastic strain at failure.

  • NRR : Axial force resultant at failure, rr direction.

  • NRS : Axial force resultant at failure, rs direction.

  • NRT : Axial force resultant at failure, rt direction.

  • MRR : Torsional moment resultant at failure, rr direction.

  • MSS : Moment resultant at failure, ss direction.

  • MTT : Moment resultant at failure, tt direction.

  • NF : Number of force vectors stored for filtering.

 

Csv

  • Csv : Read comma separated file.

  • Fixed: Read file with fixed field width.

  • Skip lines : Skip this number of lines in the beginning of file.

  • Raad lines : Read this number of lines after \"Skip lines\". 0 = End Of File.

  • Part heading : Use part HEADING instead of part ID for PIDx fields.

  • ID : Field index for weld ID (not mandatory). Zero is permitted.

  • Z : Field index for Z coordinate.

  • P3 : Field index for LS-DYNA part ID to connect with this weld.

  • X : Field index for X coordinate.

  • P1 : Field index for LS-DYNA part ID to connect with this weld.

  • P4 : Field index for LS-DYNA part ID to connect with this weld.

  • Y : Field index for Y coordinate.

  • P2 : Field index for LS-DYNA part ID to connect with this weld.

  • P5 : Field index for LS-DYNA part ID to connect with this weld.

Fixed

  • ID : Columns for weld ID (not mandatory). Single zero is permitted.

  • Z : Columns for Z coordinate.

  • P3 : Columns for LS-DYNA part ID to connect with this weld.

  • X : Columns for X coordinate.

  • P1 : Columns for LS-DYNA part ID to connect with this weld.

  • P4 : Columns for LS-DYNA part ID to connect with this weld.

  • Y : Columns for Y coordinate.

  • P2 : Columns for LS-DYNA part ID to connect with this weld.

  • P5 : Columns for LS-DYNA part ID to connect with this weld.