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

roczhp

From：http://www.dynasupport.com/news/ls-dyna-v971-r5.1-r5.1.64536-released

看看大家有没有关注和需要的更新，980的发布还需要时日？关注5.1的manual！
材料模型更新部分：
Material Models

• Added *MAT_241 (Johnson Holmquist JH1) for solid elements.
• Added *MAT_245 (pml ortho/anisotropic elastic). Perfectly matched absorbing layer material for unbounded orthotropic and anisotropic media, similar to *MAT_230 (pml elastic) for isotropic elastic media. Input format is the same as *MAT_002 (ortho/anisotropic elastic).
• Added *MAT_267 (eight chain rubber) for 2D axisymmetric element forms 14 and 15.
• Added *MAT_272 (RHT) to model concrete structures that are subjected to impulse loading.
• Added temperature dependence for solid *MAT_005 (soil and foam) and *MAT_057 (low density foam).
• Added EPSF parameter, failure strain for *MAT_018, (power law plasticity). The element will be deleted when all integration points have failed.
• Added a new keyword option _NLP_FAILURE to *MAT_037 (transversely anisotropic elastic plastic) which allows for a strain averaging for the calculation of the formability index.
• Added extra terms to the Prony series for *MAT_076 (general viscoelastic).
• Added a Prony series fit to *MAT_073 (low density viscous foam).
• Added Cowper-Symonds rate sensitivity to *MAT_153 (damage 3).
• Added a viscoelastic option to *MAT_081 (plasticity with damage) for solid elements.
• Added support of *MAT_024 (piecewise linear plasticity) for Beltyschko-Schwer beam
• Added *MAT_ADD_EROSION damage model GISSMO, by setting IDAM=1 or IDAM=-1.
• Added a fracture energy based failure criterion to *MAT_ADD_EROSION.
• Added protection against improper behavior when *MAT_ADD_EROSION is used with IDAM<0 and failure strain is extrapolated.
• Improved the convergence of *MAT_024 (piecewise linear plasticity).
• Added the Hansel hardening model to *MAT_133 (Barlat YLD 2000) as HARD=2.
• Added an option for the Young's modulus to be a function of plastic strain in *MAT_133 (Barlat YLD 2000).
• Enabled type 0 solid elements to be used for implicit solutions with *MAT_126 (modified honeycomb) and *MAT_201 (Arup honeycomb), and improved the implicit stiffness when *MAT_126 is used with other element types.
• Enabled shell elements with *MAT_082 (plasticity with damage ortho) to be used in implicit solutions.
• Enabled implicit solutions with beam element *MAT_156 (truss muscle).
• Enabled implicit solutions with *MAT_007 (Blatz-Ko rubber) and shell elements.
• Added equation of state *EOS_MIE_GRUNEISEN which is a Mie_Gruneisein equation of equation of state with the p-alpha model.
• Added a new *MAT_USER_DEFINED parameter (LCMA) in the 6th field of card 2. LCMA is the length of the additional material constant array. This allows more material constants to be defined using additional input lines with 8 constants per line. The array is called CMA in the umat subroutines.
• Fixed the non-reflecting boundary when used with *MAT_079 (hysteretic soil).
• Fixed a bug in *MAT_192 (soil brick) affecting the unusual case when the stress in the soil exceeds the stress experienced in the pre-consolidation stage (as determined by input PCGL).
• Fixed the density of *MAT_169 (Arup adhesive) when used with a unit change in *INCLUDE_TRANSFORMATION.
• Fixed the post bucking damage calculation of *MAT_171 (concentric brace).
• Improved the behavior of *MAT_191 (seismic beam) so that the response is less noisy.
• Fixed *MAT_ADD_EROSION for the case of simultaneous use of the maximum principal strain criteria and the shear strain at failure. For this case, failure by the shear strain criteria was too soon. Also, fixed an overflow problem that occurred with ductile failure.
• Improved the element deletion message for *MAT_126 (modified honeycomb) to include whether failure was by TSEF or SSEF.
• Improved the implicit element stiffness matrix for solids and shells that use *MAT_089 (plasticity polymer).
• Fixed the elout database when fully integrated shell elements are used with *MAT_058 (laminated composite fabric) or *MAT_158 (rate sensitive composite)
• Fixed an error in *MAT_163 (crushable foam) that occurred when more than one table was in the data.
• Fixed ductile damage in *MAT_159 (CSSM) concrete material for fully integrated brick elements. Prior to the fix, ductile damage occurred at only the first of the 8 integration points.
• Fixed a bug that prevented shell elements from having *MAT_114 (layered linear plasticity) in some layers and other material types in other layers.
• Modified thick shell forms 1 and 2 so that the time step deletion option of *MAT_058 (laminated composite fabric) will work correctly.
• Fixed time step calculation of *MAT_223 (orthotropic advanced damage).
• Fixed *INCLUDE_TRANSFORM for *MAT_034 (fabric) that is defined with negative load-curve IDs.
• Fixed *MAT_083 (Fu Chang foam) for which had a problem with initialization when the negative TBID option was used.
• Added an option for a more conservative stiffness calculation for *MAT_083 (Fu Chang foam).  If ED=-1 or KCON=-1, the new method is used.
• Fixed an error that occurred when multiple *MAT_NON_LOCAL cards were defined with different damage parameter locations.
• Improved the MIT failure model that may be called by user-defined materials.
• Fixed 2D axisymmetric and plane strain elements when used with user-defined materials that have IORTHO=1.
• Added a new cohesive law for EDF solid fracture simulation. It is the Tvergaard and Hutchinson type cohesive law.
• Fixed an error in the calculated yield surface for solid elements with *MAT_142 (transversely isotropic crushable foam) when used with ANG=45 degrees.
• Fixed implicit stiffness of *MAT_077 (hyperelastic).
• Fixed the reading of card 4 of *MAT_135 (WTM STM).
• Enabled more than 10 part ID's for parts using material types *MAT_103, *MAT_104, and *MAT_108.
  
  

dagezaici

R5.1早就有了,关键是什么时候放出可以使用的版本

lovehf

R5.0可以使用的版本有吗

lovehf

R5.1里增加了
Added *MAT_272 (RHT) to model concrete structures that are subjected to impulse loadin
这个模型AUTODYN里有，据说效果不错，ls-dyna终于引进了，似乎晚了点
，两外实体单元失效后转化为SPH粒子的也增加了，模拟破片似乎更形象了

20020824

什么时候公布可以使用的版本啊？

sayhellotome

测试中。。。

lzm1980123

应用中.....