We talked about 2D stationary crack analysis using KSCON in the last post. This time let's have a look at the 3D model using solid elements. A long plate with a centre crack is subjected to an end tensile stress. The sketch of the problem is as follows. A one-quarter model is used because of symmetry. … Continue reading 3D Stationary Crack Analysis: J-integral and Stress Intensity Factor Calculation
2D Stationary Crack Analysis: J-integral and Stress Intensity Factor Calculation
We talked about calculating J-integral and K1 using XFEM in the last post. XFEM is a powerful method as it eliminates the need to remesh crack-tip regions. However, there are some limitations. For example, material behaviour is assumed to be linearly elastic. The available fracture criteria are valid only for cracks in homogeneous linear elastic … Continue reading 2D Stationary Crack Analysis: J-integral and Stress Intensity Factor Calculation
XFEM-Based Stationary Crack Analysis
This post presents an example of stationary crack analysis based on the extended FEM (XFEM). A common way to model the stress concentration at a crack tip is using KSCON command which specifies a keypoint about which an area mesh will be skewed. For stationary crack analysis, reasonable accuracy can be achieved using KSCON, although … Continue reading XFEM-Based Stationary Crack Analysis
Construction Simulation of a Prestressed Reinforced Concrete Bridge: Part 1-Geometry and Meshing
The geometry of the bridge is directly generated from keypoints to lines and from keypoints to volumes. When meshing the volume, VSWEEP is used to ensure that all concrete elements are hexahedrons. The element size is controlled using LESIZE command and NDIV in L command. Prestress rebar is modelled by LINK8 element. Reinforced concrete is … Continue reading Construction Simulation of a Prestressed Reinforced Concrete Bridge: Part 1-Geometry and Meshing
Non-linear analysis of a point-fixed glass curtain wall cable-truss structure
Fig.1 Typical glass curtain walls Some assumptions and simplifications in this problem: Elastic materials Cables are modeled using LINK10 elements with the tension-only option Trusses are modeled using BEAM44 (or BEAM188) elements The glass wall is modeled using SHELL63 elements. Wind load distributes evenly on the surface. The aim of this problem is to calculate … Continue reading Non-linear analysis of a point-fixed glass curtain wall cable-truss structure
Contact analysis: a bolted flange connection
A typical bolted flange connection (see Fig.1) is modeled in this example. Fig.1. The geometry of the model. Only the 1/4 model is created due to symmetry. The challenges in this example are as follows: Complicated geometry. Applying pretension to bolts. Multiple load steps. Modeling contact. It is worth mentioning that a special element Prentension179 … Continue reading Contact analysis: a bolted flange connection
Nonlinear analysis of a cable-membrane structure: from shape-finding to static and modal analysis
Fig.1. A typical cable-membrane structure The following assumptions are made in this example: Cables are discretized using LINK10 elements. The membrane is discretized using triangular SHELL41 elements with 'cloth' feature turned on. No slip between cables and membrane. The material complies with Hooke’s Law. The material is orthotropic and elastic. The two principal axes of … Continue reading Nonlinear analysis of a cable-membrane structure: from shape-finding to static and modal analysis
Torsional limit analysis of a container
Fig.1. A typical container This problem is to analyze the torsional limit of an open container (without lid). It is a typical problem in structural nonlinear buckling analysis. As an alternative to the Newton-Raphson method, the arc-length method will be used. Fig.2. A simplified model of the container body Some assumptions and simplifications in this … Continue reading Torsional limit analysis of a container
Elastic-plastic analysis of a reinforced concrete slab strengthened by a carbon fiber sheet
A reinforced concrete slab can be strengthened by adhering carbon fiber sheets to the tension side. This is a common practice in concrete structure reinforcement (as shown in Fig.1) Fig.1. Carbon fiber reinforcement. In this problem, the reinforced concrete slab is simply supported. A carbon fiber sheet is attached to the lower surface of the … Continue reading Elastic-plastic analysis of a reinforced concrete slab strengthened by a carbon fiber sheet
ANSYS Mechanical APDL Technical Documents
Workbench-Users-Guide-2023R1Download Ansys-Parametric-Design-Language-Guide-2023R2Download Ansys-Mechanical-Users-Guide-2024R1Download ANSYS-Mechanical-APDL-Theory-Reference-15Download ANSYS-Mechanical-APDL-Structural-Analysis-2023R1Download ANSYS-Mechanical-APDL-Material-Reference-2020R1Download ANSYS-Mechanical-APDL-Fracture-Analysis-Guide-2020R1Download ANSYS-Mechanical-APDL-Element-Reference-2022R1Download Ansys-Mechanical-APDL-Command-Reference-2024R1Download ANSYS-Mechanical-APDL-Advanced-Analysis-Guide-2020R1Download Ansys-Fluent-Tutorial-Guide-2022-R2Download
Xutao Sun 