*MAT_224 (TABULATED_JOHNSON_COOK)

LS-DYNA入力インターフェースのキーワードThis model expresses material stress as a function of strain, strain rate, temperature dependency and plastic strain failure criterion.

Format

(1) (2) (3) (4) (5) (6) (7) (8)
*MAT_224_{OPTION} or *MAT_TABULATED_JOHNSON_COOK_{OPTION}
mat_ID ρ i E υ CP Tref Beta Nfail
TAB_strs TAB_temp TABf_tri TABf_rate TABf_temp TABf_size

Definition

Field Contents SI Unit Example
Option
<BLANK> (Default)
The strain rate effect in table TAB_strs is interpolated with linear interpolation.
LOG_INTERPOLATION
The strain rate effect in table TAB_strs is interpolated with logarithmic interpolation.
mat_ID Material identifier.

(Integer)
ρ i Initial density.

(Real)

 [ kg m 3 ]
E Young's modulus.

(Real)

 [ Pa ]
υ Poisson's ratio.

(Real)
CP Specific heat coefficient.

(Real)
Tref Reference temperature.

(Real)

 [ K ]
Beta Fraction of plastic work converted in heat.

(Real)
Nfail
> 0
Number of integration points for solid element to fail.
< 0
Percentage of integration points for solid element to fail.

(Real)
TAB_strs Table identifier for effective stress versus plastic strain and strain rate.

(Integer)

 [ Pa ]
TAB_temp Table identifier for effective stress scaling coefficient versus temperature.

(Integer)
TABf_tri Table identifier for plastic strain to failure versus triaxiality index and Lode angle.

(Integer)
TABf_rate Table identifier for plastic strain to failure scaling coefficient versus strain rate.

(Integer)
TABf_temp Table identifier for plastic strain to failure scaling coefficient versus temperature.

(Integer)
TABf_size Table identifier for plastic strain to failure scaling coefficient versus element size.

(Integer)

Comments

  1. This keyword maps to /MAT/LAW109 and /FAIL/TAB2.
  2. LOG_INTERPOLATION can be added to use logarithmic interpolation for strain rate dependent tables.
  3. このキーワードの最後にオプション“_TITLE”を追加することができます。“_TITLE”が含まれている場合、キーワード入力行の後に余分に80文字の長さの行が追加され、エンティティタイトルを定義できるようになります。