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Multiple material sections may be defined with an input file. Each material section is identified by its unique own name. A particular name must not be referenced by a solid section (10.6). In that case the respective material will be ignored.
The section keyword *MATERIAL has as option
*NAME=<name> 
specifies a unique name which basically may be freely chosen (mandatory) 
The section keyword *MATERIAL has own keywords.
A first keyword *DENSITY indicates the specific mass of the respective material. It has one dataline giving the value. Specific mass should not be confused with the specific weight, both differ by earth acceleration. The chosen mass unit has to be consistent with the units for length, force and time. If the keyword *DENSITY is not given a zero mass is assumed and dynamic calculations are performed as quasistatic.
Each material section or each section keyword *MATERIAL
material keyword 
space 
symmetric 
book( http://www.concretefem.com) 

dimensions 
material matrix 
sections 

*ELASTIC 
isotropic linear elastic 
1D, 2D, 3D 
yes 
1.4, 5.3 
*MISES 
isotropic mises elastoplastic 
1D, 2D, 3D 
yes 
2.3, 5.5.1 
*RCBEAM 
plane reinforced concrete cross section 
1D 
3.1.3 

*TCBEAM 
plane reinforced concrete cross section 
1D 

completed with textile or other reinforcement 

*ELASTICLT 
isotropic linear elastic with limited tensile 
1D, 2D 
6.3 

strength and smeared crack 

*ELASTICLT_RCSHELL 
*ELASTICLT adopted to shell layers 
2D 
8.7.1 

*ISODAMAGE 
isotropic damaged elasticity 
1D, 2D, 3D 
yes 
5.6 
*SPRING 
nonlinear spring 
1D 
2.4 

*MISESREMEM 
*MISES adopted to reinforcement layers of plates 
2D 
6.4 

*NLSLAB 
nonlinear model for Kirchhoff slabs 
2D 
7.7 
The following combinations between element types and material types are currently possible:
B23E 
B23 
B21E 
B21 
T1D2 
T2D2 
T3D2 
S1D2 
CPE3 
CPE4 
CPS3 
CPS4 
SB3 
SH4 

*ELASTIC 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
*MISES 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
 
+ 
+ 
+ 
+ 
 
+ 
*RCBEAM 
+ 
+ 
+ 
+ 
 
 
 
 
 
 
 
 
 
 
*TCBEAM 
+ 
+ 
+ 
+ 
 
 
 
 
 
 
 
 
 
 
*ELASTICLT 
 
 
 
 
+ 
+ 
+ 
 
+ 
+ 
+ 
+ 
 
 
*ISODAMAGE 
 
 
 
 
+ 
+ 
+ 
 
+ 
+ 
+ 
+ 
 
 
*SPRING 
 
 
 
 
 
 
 
+ 
 
 
 
 
 
 
*MISESREMEM 
 
 
 
 
 
 
 
 
+ 
+ 
+ 
+ 
 
 
*NLSLAB 
 
 
 
 
 
 
 
 
 
 
 
 
+ 
 
Material keywords generally have no options. Each material keyword has its specific data line which are described in the following.
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The data line describe the following properties
, 

with

Young’s modulus 

Poisson’s ratio, not used for 1D 
The given sequence is mandatory. Values have to be separated by commas. Extra values or comment like data are ignored. The same remarks hold for all data lines of the following material keywords.
The data line describe the following properties
, 
, 
, 
, 
, 

with

Young’s modulus 

Poisson’s ratio, not used for 1D 

yield stress in case of uniaxial stress 

failure stress in case of uni axial stress 

strain corresponding to 

thermal expansion coefficient 
The first data line describes the following concrete properties
, 
, 
, 
, 
, 




with

Young’s modulus 

compressive strength 

strain corresponding to compressive strength 

ultimate strainhardening strength in case of uniaxial stress 

tensile strength (used for tension stiffening) 

number of layers for integration of nonlinear stressstrain relation 
uses a linear relation without tension 

is mandatory to compute creep of concrete 


thermal expansion coefficient 

creep coefficient 

creep time 
The second data line describes the following reinforcing steel properties
, 
, 
, 
, 
, 

with

Young’s modulus 

Poisson’s ratio, not used here for reinforcement 

yield strength in case of uniaxial stress 

hardening strength in case of uni axial stress 

strain corresponding to 

thermal expansion coefficient 
which corresponds to the *MISES data line.
The first and second data line are the same as for the *RCBEAM material keyword.
Reinforcing steel contribution can be set to zero by setting , see Sections 10.5 or 10.7, respectively.
The third dataline describes the following properties of a textile like brittle reinforcement
, 
, 
, 

with

compressive and initial tensile Young’s modulus 

strain limiting upper range of 

tensile strength 

strain corresponding to 
which corresponds to a bilinear course with limited tensile strength.
The data line describe the following properties
, 
, 
, 
, 
, 
, 
, 


with

Young’s modulus 

Poisson’s ratio 

yield strength in case of uniaxial stress 

hardening strength in case of uniaxial stress 

strain corresponding to 

creep coefficient 

creep time 

criterion for failure: stress, strain 

crack ‘viscosity’ 
The data line describe the following properties
, 
, 
, 
, 

, 

, 
, 
, 

with

initial Young’s modulus 

Poisson’s ratio 

uniaxial compressive strength 

uniaxial tensile strength 

type of triaxial strength surface 
choose 


biaxal compressive strength related to uniaxial compressive strength 

circumferential stress related to longitudinal stress (compression) of confined cylinder specimen 

longitudinal strength related uniaxial compressive strength of confined cylinder specimen 

regularization type 
: no regularization 

: gradient damage – might not work with all element types ( open issue) 

: crack band – might not work with all element types ( open issue) 


characteristic length for 
cack energy for 


artificial viscosity – sorry, this might sometimes be necessary for convergence (trial and error!) 
Some care has to be taken in choosing the relations of , , and the value of . There might be unfeasible choices. As an example
36300.,0.2, 40.,3.5, 1,1.2,0.2,2.0, 2,150.e6, 0.
should make sense for C40 according to MC2010.
This material type provides a force depending on a relative displacement . This is basically described by cubic splines. It behaves in the same way in the negative and positive range. The data line describes the following properties
, 
, 
, 
, 
, 
, 

with

currently not used 

prescribed relative displacement 

force prescribed with 
for 


prescribed relative displacement, 

force prescribed with 
for 


end of starting range of relative displacement with linear stiffness up to 
may be set to starting with a cubic spline with initial slope 


initial stiffness for 
This material type provides a reinforcement like plane sheet with uniaxial mises elastoplasticity. The data line describes the following properties
, 
, 
, 
, 
, 

with

Young’s modulus 

orientation of reinforcement with respect to global direction in degrees 

yield strength in case of uniaxial stress 

hardening strength 

strain corresponding to 

thermal expansion coefficient 
which to a large degree corresponds to the *MISES data line.
This material type provides a bilinear momentcurvature relation for usage with Kirchhoffslabs. Elastoplastic unloading is not covered. The data line describes the following properties
, 
, 
, 
, 
, 
, 

with

initial slab bending stiffness in global direction 

initial slab bending stiffness in global direction 

final slab moment of initial branch in global direction (‘yield’moment) 

final slab moment of initial branch in global direction (‘yield’moment) 

final slab bending stiffness in global direction (‘hardening’stiffness) 

final slab bending stiffness in global direction (‘hardening’stiffness) 

factor for twisting stiffness 