Reply To: shell element with orthotropic materials gives very different results from experimental data

[emirdegirmenli]

Thank you, Peter, I also anticipate to get better results from shell element but If you check last image (results) you will see that results obtained from solid (right side) element closer than shell element. Even I can't see one of bending modes by using the shell element. I've inserted new image of material properties. Actually, I've tried different material properties from another Ph.D. thesis but I can't solve the problem.  Rectangular plate dimensions (Spruce): x:493 mm, y: 182mm, x: 3mm. experimental modal analysis results: two node line along x-axis: 105Hz, two node line along y-axis: 63Hz. I've obtained similar results by using solid element, 105,33 Hz and 62,36 Hz respectively. But when I use shell element, results are very different experimental data, 19Hz and no results respectively. Best

Emir

experimental results

 FEM Results