Plasticity
A plate of 1,200 Belytschko-Tsay shell elements strikes a wall at an angle of 45 degrees from the wall normal. The impact velocity is 20,775 in/sec. and the termination time is 0.00025 seconds.
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# Plasticity

A plate of 1,200 Belytschko-Tsay shell elements strikes a wall at an angle of 45 degrees from the wall normal. The impact velocity is 20,775 in/sec. and the termination time is 0.00025 seconds.

*MAT_PIECEWISE_LINEAR_PLASTICITY Piecewise Linear Plasticity Fragmenting Plate LS-DYNA Manual Section: *MAT_PIECEWISE_LINEAR_PLASTICITY Example: Piecewise Linear Plasticity Fragmenting Plate Filename: mat_piecewise_linear.plate-shatter.k Description: A plate of 1,200 Belytschko-Tsay shell elements strikes a wall at an angle of 45 degrees from the wall normal. The impact velocity is 20,775 in/sec. and the termination time is 0.00025 seconds. Model: The material description contains Young's Modulus, Poisson's ratio, yield stress, hardening modulus, ultimate plastic strain, and time step size for element deletion. Input: One material definition for a Belytschko-Tsay shell with viscous hour glass control (*CONTROL_HOURGLASS). Young's Modulus, Poisson's ratio, yield stress and the hardening modulus are 16 Msi, 0.35, 155,000 psi, and 192,000 psi respectively. (*MAT_LINEAR_PIECEWISE_PLASTICITY). The plastic strain at failure is 32% and the failure minimum time step size is 0.3 microseconds. Results: The plate deforms away from the stonewall and the plate fragments.

*CONTACT_SURFACE_TO_SURFACE *CONTROL_CONTACT *CONTROL_HOURGLASS *CONTROL_TERMINATION *DATABASE_BINARY_D3PLOT *ELEMENT_SHELL *END *INITIAL_VELOCITY *KEYWORD *MAT_PIECEWISE_LINEAR_PLASTICITY *NODE *PART *SECTION_SHELL *SET_NODE_LIST *SET_PART_LIST *TITLE

*KEYWORD *TITLE Test for Material 24 with Failure $ $ LSTC Example $ $ Last Modified: September 18, 1997 $ $ Units: lbf-s2/in, in, s, lbf, psi, lbf-in $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $$$$ Control Ouput $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8 $ *CONTROL_TERMINATION $ endtim endcyc dtmin endneg endmas 2.500E-04 5.000E-02 $ *CONTROL_CONTACT $ slsfac rwpnal islchk shlthk penopt thkchg orien 0.01 $ usrstr usrfac nsbcs interm xpenen $ *CONTROL_HOURGLASS $ ihq qh 4 $ *DATABASE_BINARY_D3PLOT $ dt/cycl lcdt 1.250E-05 $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $$$$ Initial Conditions $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8 $ $$$$ All nodes except nodes in node set 1 are given an initial velocity. $$$$ Node set 1 contains the nodes of the wall. $ *INITIAL_VELOCITY $ nsid nsidex boxid 1 $ $ vx vy vz vxr vyr vzr -1.469E+04-1.469E+04 0.000E+00 0.000E+00 0.000E+00 0.000E+00 $ $ vxe vye vze vxre vyre vzre $ $ *SET_NODE_LIST $ sid 1 $ nid1 nid2 nid3 nid4 nid5 nid6 nid7 nid8 1282 1283 1284 1285 $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $$$$ Contacts - Sliding Interfaces $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8 $ *CONTACT_SURFACE_TO_SURFACE $ ssid msid sstyp mstyp sboxid mboxid spr mpr 1 3 2 3 1 1 $ fs fd dc vc vdc penchk bt dt 0.3 0.3 $ sfs sfm sst mst sfst sfmt fsf vsf $ $ *SET_PART_LIST $ sid 1 $ pid1 pid2 pid3 1 2 $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $$$$ Define Parts and Materials $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8 $ *PART $ pid sid mid eosid hgid adpopt plate 1 1 1 plate-tip 2 1 1 wall 3 1 1 $ $ *MAT_PIECEWISE_LINEAR_PLASTICITY $ mid ro e pr sigy etan eppf tdel 1 4.1408E-4 16.00e+6 0.35 155000. 192000. 0.32 0.03e-6 $ c p lcss lcsr $ eps1 eps2 eps3 eps4 eps5 eps6 eps7 eps8 $ es1 es2 es3 es4 es5 es6 es7 es8 $ $ *SECTION_SHELL $ sid elform shrf nip propt qr/irid icomp 1 0 5 3 0 $ t1 t2 t3 t4 nloc 0.125 0.125 0.125 0.125 $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $$$$ Define Nodes and Elements $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $$$$ Nodes 1282, 1283, 1284, 1285 are fixed - nodes of the wall. $ $ *END