In cross‑sections created in SHAPE‑THIN, the openings, such as bolt holes, can be modeled by the elements with zero thickness. The program provides two options for calculating shear stresses in the area of such null elements.
KB 000482 | Calculation of Shear Stresses for Openings
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![Determination of Shear Stresses for Null Elements](/en/webimage/014957/2954564/01-en.png?mw=512&hash=65e98cfe859ce35a3e3e9da47a0ef9335401520e)
In cross‑sections created in SHAPE‑THIN, the openings, such as bolt holes, can be modeled by using the elements with zero thickness. The program provides two options for calculating shear stresses in the area of such null elements.
![Editing Member with Variable SHAPE-THIN Cross-Section](/en/webimage/010434/2954732/01-en.png?mw=512&hash=65e98cfe859ce35a3e3e9da47a0ef9335401520e)
In RFEM and RSTAB, you can analyze members with a variable cross-section, which can also consist of freely defined SHAPE-THIN cross-sections. The cross-section properties are interpolated in order to determine the internal forces and deformations.
![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.
![Add-on "Stress-Strain Analysis"](/en/webimage/032560/3346069/1_EN_NEW.png?mw=512&hash=a575d6bdf75cc9392f8d3424a554e6f805a60464)
This article shows how to manage the input data for member and surface design configurations within the Stress-Strain Analysis add-on.
![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 002426 | Animation of Deformation](/en/webimage/032091/3328083/AnimationRFEM6_EN.jpg?mw=512&hash=ecf9e52031e929ead1b99a37bfa7e0b1c3a2f4f2)
The deformation process of the global deformation components can be represented as a movement sequence.
![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.
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