BUG: Angle of Layers and Stiffness Reduction are ignored in Multilayer Thicknesses

[Lulatsch39]

Hi there,

when creating a Thickness of type Layers with the Multilayer Surfaces Add-On I can't define the angle of the different layers. As written in the documentation I provide a list of lists for the layers as followed:

layers = [['E_THICKNESS_TYPE_DIRECTLY', 2, 0.04, 0], ['E_THICKNESS_TYPE_DIRECTLY', 3, 0.02, 90], ['E_THICKNESS_TYPE_DIRECTLY', 3, 0.02, 0], ['E_THICKNESS_TYPE_DIRECTLY', 3, 0.02, 90], ['E_THICKNESS_TYPE_DIRECTLY', 2, 0.04, 0]]

The materials 2 and 3 are defined with material type orthotropic:

Material(2, 'Stora Enso (40 mm)', params={'material_model': 'MODEL_ORTHOTROPIC_2D'})
Material(3, 'Stora Enso (20 mm)', params={'material_model': 'MODEL_ORTHOTROPIC_2D'})

However, the last entry of each layers list (0 or 90) is taken as a comment and not as the angle of the layer. This can be seen in RFEM in the created layers tab:

Additionally, the provided parameters for the stiffness modification do not have any influence. The values for K33, K44, K55, K88 are ingored. I'm using the following code to create the thickness:

Thickness.Layers(n, name, layers, stiffness_reduction=True, 
stiffness_modification=[[0.65, None], [1, None], [1, None], [0.7, None]],
clt_options=[[True, 100, 100], [False, 0, 0]],
params={'is_enabled_design_of_failure': True,
'plank_width_bx': 0.1,
'plank_width_by': 0.1,
'stiffness_reduction_enabled': True,
'plank_width_including_gap_enabled': False,
'K33': 0.65, 'K44': 1.0, 'K55': 1.0, 'K88': 0.7})

Input:

Created thickness of type layers with the stiffness reduction factors still set to 1.00 instead of 0.65 and 0.7 respectively:

• Version of WIN10 OS: [WIN 10 21H1]
• Version of RFEM6.05.0001
• Version of tool Release v1.19.2

[OndraMichal]

Hi @Lulatsch39, thank you for reporting the issue. I think it due tu missing parameter user_defined_stiffness which would unlock the feature for editing. Rreported bug 163355.