Wood Post
A wooden post with a hole is hit by a bar and is supposed to snap-off. The bar is rigid and extra mass is added via density to give it enough energy to snap the post. Download is available in the download section of this document.
Keywords
Keywords
This example has been taken from the introductory class of John D. Reid. Example name: wood-post.k
The used Keywords in alphabetical order.
*BOUNDARY_SPC_NODE *CONTACT_AUTOMATIC_SINGLE_SURFACE *CONTROL_ENERGY *CONTROL_TERMINATION *DATABASE_BINARY_D3PLOT *DATABASE_BINARY_D3THDT *DATABASE_EXTENT_BINARY *DATABASE_GLSTAT *DATABASE_HISTORY_NODE *DATABASE_MATSUM *DATABASE_NODOUT *DATABASE_RBDOUT *DATABASE_SLEOUT *ELEMENT_SHELL *ELEMENT_SOLID *END *INITIAL_VELOCITY_GENERATION *KEYWORD *MAT_PIECEWISE_LINEAR_PLASTICITY *MAT_RIGID *NODE *PART *SECTION_SHELL *SECTION_SOLID *TITLE
Reduced Input
Reduced Input
This example has been taken from the introductory class of John D. Reid. Example name: wood-post.k
*Node and *Element Cards are removed.
*KEYWORD
*TITLE
A wooden post, with a hole, is hit by a bar and is supposed to snap-off.
$
$$ The bar is rigid and extra mass (via density) is added to
$$ give it enough energy to snap the post.
$
$$ This model uses constant stress solid element formulation (default: type 1)
$$ for the posts and default hourglass viscosity type 1.
$
$
$ John D. Reid 2/6/95, 3/11/98, 2/7/00
$
$ Units: mm, kg, ms, kN, GPa, kN-mm
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Control Ouput
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
*CONTROL_TERMINATION
$ endtim endcyc dtmin endeng endmas
7.00
$
*CONTROL_ENERGY
$ hgen rwen slnten rylen
2 2
$
*DATABASE_BINARY_D3PLOT
$ dt lcdt
0.5
$
*DATABASE_EXTENT_BINARY
$ neiph neips maxint strflg sigflg epsflg rltflg engflg
$ cmpflg ieverp beamip
1
$
*DATABASE_BINARY_D3THDT
$ dt lcdt
999999
$
$
*DATABASE_GLSTAT
$ dt
0.10
$
*DATABASE_MATSUM
$ dt
0.10
$
*DATABASE_NODOUT
$ dt
0.10
$
*DATABASE_HISTORY_NODE
$ id1 id2 id3 id4 id5 id6 id7 id8
758
$
*DATABASE_RBDOUT
$ dt
0.10
$
*DATABASE_SLEOUT
$ dt
0.10
$
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Contacts - Sliding Interfaces
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
*CONTACT_AUTOMATIC_SINGLE_SURFACE
$ ssid msid sstyp mstyp sboxid mboxid spr mpr
0 0 1 1
$ fs fd dc vc vdc penchk bt dt
$ sfs sfm sst mst sfst sfmt fsf vsf
$
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Boundary Conditions
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
*BOUNDARY_SPC_NODE
$ nid cid dofx dofy dofz dofrx dofry dofrz
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Initial Conditions
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
*INITIAL_VELOCITY_GENERATION
$ sid styp omega vx vy vz
3 2 26.82 0.0 0.0
$ xc yc zc nx ny nz phase
$
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Define Parts and Materials
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
$
$$$ Part 3 shell: bar
$
$$$ Part 4 solid: lower_post
$
$$$ Part 5 solid: upper_post
$
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ Bar
$
$$ Bar - Rigid, constrained to translate only in the x-direction
$
*PART
bar
$ pid sid mid eosid hgid grav adpopt
3 1 1
$
$
*MAT_RIGID
$ mid ro e pr n couple m alias
1 0.143E-02 200.0 0.33
$
$ cmo con1 con2
1.0 5 7
$
$ lco/a1 a2 a3 v1 v2 v3
$
$
*SECTION_SHELL
$ sid elform shrf nip propt qr/irid icomp
1 2 3.0000
$ t1 t2 t3 t4 nloc
1.54 1.54 1.54 1.54
$
$
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ Post
$
$
*PART
$ pid sid mid eosid hgid grav adpopt
$
lower_post
4 2 2
upper_post
5 2 3
$
$
*MAT_PIECEWISE_LINEAR_PLASTICITY
$ mid ro e pr sigy etan eppf tdel
2 0.499E-06 11.37 0.32 0.0468 0.11
$ Cowper/Symonds Strain Rate Parameters
$ C p lcss lcsr
$ plastic stress/strain curves
0.000 0.250
0.0468 0.0470
$
$
*MAT_PIECEWISE_LINEAR_PLASTICITY
$ mid ro e pr sigy etan eppf tdel
3 0.499E-06 110.37 0.32 0.0468 0.25
$ Cowper/Symonds Strain Rate Parameters
$ C p lcss lcsr
$ plastic stress/strain curves
0.000 0.250
0.0468 0.0470
$
$
*SECTION_SOLID
$ sid elform
2
$
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Define Nodes and Elements
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
*END
Figures
Figures
This example has been taken from the introductory class of John D. Reid. Example name: wood-post.k
Animated Result
Animated Result
This example has been taken from the introductory class of John D. Reid. Example name: wood-post.k
Download
Download
This example has been taken from the introductory class of John D. Reid. Example name: wood-post.k
