Question
Is there any possibility in the program to obtain axial forces and moments from the calculated stresses for solids?
Answer:
For solids, no internal forces are available in the program. Converting stresses into internal forces would also be very complex, because not only would mx, my, and mz be available, but also the torsional components mxy, myz, and mxz, as well as shear and axial forces. In the case of solids, one is usually limited to the direct stress evaluation. If you still need internal forces, you have the possibility to refer the internal forces of a solid to a member. The result beam has been implemented in the program for this purpose.
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![KB 001848 | Timber Column Design as per the 2018 NDS Standard in RFEM 6](/en/webimage/040983/3525158/Timber_Column_for_KB_1848.png?mw=512&hash=8767c3300658d77c253bb7ff632327937a04dd95)
Using the Timber Design add-on, timber column design is possible according to the 2018 NDS standard ASD method. Accurately calculating timber member compressive capacity and adjustment factors is important for safety considerations and design. The following article will verify the maximum critical buckling strength calculated by the Timber Design add-on using step-by-step analytical equations as per the NDS 2018 standard including the compressive adjustment factors, adjusted compressive design value, and final design ratio.
![Activating Weld Design in RF-/STEEL EC3](/en/webimage/010282/3040103/1_activate_weld_design.png?mw=512&hash=9fb5bd77c9e682432b746c03fecdba8aa80b4678)
The RF‑/STEEL EC3 add-on module can perform the design of fillet welds for all parametric, welded cross-sections of the cross-section library. For this, the option must be activated in the detail settings of the module. As an alternative, you can also use a surface model for the design.
![Model](/en/webimage/011774/2600584/01-de.png?mw=512&hash=9f2525444a7414dfb1c05a73e375e9c4fe4f47b1)
Designing rigid end plate connections is difficult for four-row connection geometries and multi-axis bending stresses, because there are no official design methods.
![System with Local Axis System of Gusset Plate](/en/webimage/011743/3065040/01_-_en_us.jpg?mw=512&hash=2a77856259cebbe0dd4f7bd67111e0e92e909dd2)
The European standard EN 1993-1-8, Section 4.5.3.3. provides the user with a simplified method for the ultimate limit state design of fillet welds. According to the standard, the design is fulfilled if the design value of the resultant acting on the fillet weld area is smaller than the design value of the weld's load-bearing capacity. Thus, if you want to dimension the weld for a surface model, you will be faced with a variety of results due to the nature of FEM calculations. Therefore, we show in the following text how to determine the force components from the model.
![Feature 002423 | Displaying Results in Solids](/en/webimage/031923/3325382/FE_Solid_EN.jpg?mw=512&hash=d2950a5e2123942fab13aad296e814c67695c955)
The results of solid stresses can be displayed as colored 3D points in the finite elements.
![Feature 002842 | Sign-Dependent Stress Analysis](/en/webimage/051240/3953337/1.png?mw=512&hash=9d7f6c198b6d4ae6ee8f2fa8bca75f85579e14c9)
In the Stress-Strain Analysis add-on, you can use the option to specify sign-dependent limit stresses by stress component.
![Feature 002827 | Stresses Within Members](/en/webimage/050679/3922742/50679.png?mw=512&hash=89c2586ec7139690a213073aaa5a3e314c7ed023)
Get a better understanding of the stress distribution within member cross-sections by using clipping planes.
![Feature 002443 | Control of Crack Condition for Deformation and Crack Width Analysis](/en/webimage/032308/3333735/crackstate_EN.jpg?mw=512&hash=7a751769b3bfd152da28f9c235b662fe4a66d28f)
Various design parameters of the cross-sections can be adjusted in the serviceability limit state configuration. The applied cross-section condition for the deformation and crack width analysis can be controlled there.
For this, the following settings can be activated:
- Crack state calculated from associated load
- Crack state determined as an envelope from all SLS design situations
- Cracked state of cross-section - independent of load
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