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RC Beam Column Joint Ansys TB Error

Submitted by mahinryan on

hello everyone,

I model a reinforced concrete Beam column Joint in ansys .total 32 number of load steps inthe 20th load steps  the below error was appear .

Please guide me That Error What's meaning ?



 The supplied nonlinear material properties produced an incorrect       

 material tangent matrix.  Please check your TB input carefully.  A     

 very small yield stress may cause this failure.

thanks and regards