I am a PhD student on Timber structure.I have modelled timber beam using solid 45 element as 4 points bending but my result is overestimated.I have reviewed the literature and I have found that assigning Tsai_Wu failure mode in timber can solve the problem.I have found Tsai-Wu in following category in Ansys 12.1:Material model/nonlinear/inelastic/non metal plasticity/failure criteria/criteria3But Ansys appears the following error:*** ERROR *** CP = 2.891 TIME= 16:56:04 Failure criteria input values for signs on stresses for material 1 are not correct. Please find the picture and log file as further informatuion on input data.Any help on assigning Tsai-Wu and How to model timber material (bending test) in Ansys would be highly appreciated.
farzad ,i am also doing
farzad ,i am also doing research in timber beams.my mail id is yashidanadir [at] gmail.com (yashidanadir[at]gmail[dot]com) would u please mail me how u solved this problem.