Rigid
A center of mass is constrained to slide along a local coordinate system. The termination time is 0.010 seconds. Download is available in the download section of this document.
Introduction
*MAT_RIGID Rigid Sliding Block in Local Coordinate System LS-DYNA Manual Section: *MAT_RIGID Additional Sections: *DEFINE_COORDINATE_VECTOR *LOAD_SEGMENT Example: Rigid Sliding Block in Local Coordinate System Filename: mat_rigid.block-slide.k Description: A center of mass is constrained to slide along a local coordinate system. The termination time is 0.010 seconds. Model: The material description references a local coordinate system to constrain the rigid block. The rigid block is free to translate along the local z axis. Input: The material definition is a rigid material (*MAT_R IGID). The material specifies the use of a local coordinate system, the local coordinate constraint value of 100111 (tx ty tz rx ry rz), and the local coordinate system for output. The local coordinate system specifies that the local origin is the global origin, the local x-axis point is (1.0,0.0,1.0) and the local y-axis point is (0.0,0.0,1.0) (*DEFINE_COORDINATE_VECTOR). A shell element is defined in order to control the time-step. Results: The block slides along the local coordinate system.
Keywords
*CONTROL_TERMINATION *DATABASE_BINARY_D3PLOT *DEFINE_COORDINATE_VECTOR *DEFINE_CURVE *ELEMENT_SHELL *ELEMENT_SOLID *END *KEYWORD *LOAD_SEGMENT *MAT_ELASTIC *MAT_RIGID *NODE *PART *SECTION_SHELL *SECTION_SOLID *TITLE
Reduced Input
*KEYWORD
*TITLE
Sliding Block
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$ LSTC Example
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$ Last Modified: September 18, 1997
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$ Units: lbf-s2/in, in, s, lbf, psi, lbf-in
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$$$$ Control Ouput
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$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
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*CONTROL_TERMINATION
$ endtim endcyc dtmin endneg endmas
1.000E-02
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*DATABASE_BINARY_D3PLOT
$ dt lcdt
5.000E-04
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$$$$ Define Parts and Materials
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$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
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*PART
$ pid sid mid eosid hgid adpopt
block
1 1 1
plate
2 2 2
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*MAT_RIGID
$ mid ro e pr n couple m alias
1 7.85e-04 30.00e+06 0.300
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$ cmo con1 con2
-1.0 1.0 100111
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$ lco/a1 a2 a3 v1 v2 v3
1.0
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*DEFINE_COORDINATE_VECTOR
$ cid xt yt zt xh yh zh
1 1.000E+00 0.000E+00 1.000E+00 0.000E+00 0.000E+00 1.000E+00
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*MAT_ELASTIC
$ mid ro e pr da db k
2 7.85e-04 30.00e+06 0.300
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*SECTION_SOLID
$ sid elform
1 0
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*SECTION_SHELL
$ sid elform shrf nip propt qr/irid icomp
2
$ t1 t2 t3 t4 nloc
1.0 1.0 1.0 1.0
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$$$$ Loading
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$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
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*LOAD_SEGMENT
$ lcid sf at n1 n2 n3 n4
1 1.000E+00 0.000E+00 53 49 50 54
1 1.000E+00 0.000E+00 57 53 54 58
1 1.000E+00 0.000E+00 61 57 58 62
1 1.000E+00 0.000E+00 54 50 51 55
1 1.000E+00 0.000E+00 58 54 55 59
1 1.000E+00 0.000E+00 62 58 59 63
1 1.000E+00 0.000E+00 55 51 52 56
1 1.000E+00 0.000E+00 59 55 56 60
1 1.000E+00 0.000E+00 63 59 60 64
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*DEFINE_CURVE
$ lcid sidr scla sclo offa offo
1
$ abscissa ordinate
0.000E+00 1.000E+02
1.000E-02 1.000E+02
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$$$$ Define Nodes and Elements
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*END
Figures
Animated Result
