LS-DYNA V971 R5.1 (R5.64536) released

New version of LS-DYNA is released for all common platforms.

Version 971 R5.1 includes the following new features, enhancements, and significant corrections made since the release of R5.0.

Boundary Conditions
Contact Options
SHLEDG on *CONTROL_CONTACT has 2 valid values     .eq.0:  default, round edge     .eq.1:  use square edges    SHLEDG on optional card D, field 8 has 3 valid values.     .eq.0:  use the *CONTROL_CONTACT value     .eq.1:  use square edges     .eq.2:  use round edges 
d3psd and d3rms for random vibration analysis d3ftg for random fatigue analysis d3ssd for response amplitude plot for SSD d3spcm for response spectrum analysis 
IEVERF 0-write multiple interface force output to one d3intf file        1-write one interface force output for each d3intf file 
NCPMOUT:      Eq.11(default) version 3, all data out      Eq.21:         version 4, all data out      Eq.22:                    coordinates only      Eq.23:                    summary only 
Define Options
METHOD=-8 for *INTERFACE_COMPENSATION_NEW causes the trim die shape to be based on previous springback  To allow multi-step springback compensations in line dies, two new keywords were added,    *INTERFACE_COMPENSATION_NEW_MULTI_STEPS and *INCLUDE_COMPENSATION_COMPENSATED_SHAPE_NEXT_STEP  which are used together with *INCLUDE_COMPENSATION_DESIRED_BLANK_SHAPE, and,  *INCLUDE_COMPENSATION_CURRENT_TOOLS, to calculate tooling shape for the next step.  Automatic iteration/accelerated compensation was added using new keywords *INTERFACE_COMPENSATION_NEW_ACCELATOR, *INCLUDE_COMPENSATION_ORIGINAL_DYNAIN, and,  *INCLUDE_COMPENSATION_SPRINGBACK_INPUT. 
Frequency options
Include Options
*INCLUDE_PATH_RELATIVE  my_incdir  and the problem is run using:  ls971 i=../inputdir/problem.k     then the effect would be as if this was in the input:  *INCLUDE_PATH  ../inputdir/my_incdir  This allows an input and its include files to be moved around and run from anywhere,  without having to modify any *INCLUDE or *INCLUDE_PATH statements. 
*NODE +      lines of long format node data *ELEMENT -      lines of short format element data
Initial Conditions
ITSFLG = 0: keep transverse shear stresses ITSFLG = 1: set transverse shear stresses to zero 
Material Models
1. If XC<0, Poisson's ratio becomes zero after failure in compressive fiber mode. 2. Corrected the behavior for the SLIMx values. 
mode 1: eroded solid elements will be replaced by SPH to keep mass and momentum conserved.  mode 2: SPH elements are embedded in solid elements to provide a transition layer of          coupling to replace SPH-solid tied contacts  mode 3: solid elements could be switched to SPH elements to carry large deformation  
Spot Welds
 0 - default - damage initiated by plastic strain, and damage is a      function of plastic strain; this behavior is identical to past      versions so back compatibility is maintained.  1 - like option 0, but a force limiting function is used after damage      initiation to prevent force growth.  2 - damage initiated by plastic strain, but damage is a function of      time; the force limiter is also used. 10 - like option 0, but damage is also initiated by the failure function 11 - like option 1, but damage is also initiated by the failure function 12 - like option 2, but damage is also initiated by the failure function  With damage options 0, 1, 10, and 11, RS is the rupture strain, and RS-EFAIL must be a positive number.  With damage options 2 and 12, RS is the time from damage initiation to failure, so RS must be a positive number.