nThis model has a timber material defined using an Orthotropic Elasticity where the high stiffness direction is defined along X.n
The high stiffness direction in timber is along the grain, and a long beam has the grain running along the length of the beam. Below is the image of the timber frame. The Header/Footer Rails are oriented along the X axis, so the orthotropic properties are appropriate for those two beams, but the five studs are along the Y axis but nothing has been done to align the material coordinate system to have the high stiffness along that axis. This model is simulating the grain running across the thickness of the stud which is wrong. n
I wasn't getting realistic action at the joints.nI recommend you delete the nails and the holes in the footings and studs and replace them with an actual joint, such as a Revolute Joint. In the image below, you can see that I have arranged the Z axis of rotation to be aligned along the right edge at the bottom of the stud. Put the revolute axis at the left edge at the top of the stud. This will create the correct hinge points for the joint action you want as the frame is put under the shear load.n
If you take this approach, you can delete all the contact between the studs and the footer/header rails.nWhen you delete all the holes from the studs and footer/header, the mesh will improve.nMake sure that every solid body has at least two elements through the thickness, such as the Load Plate shown below.n
A better Idea is to delete the Load Plate and just push on the end face of the Header Rail. You can use a Remote Force to position the center of force to the location where the center of the Load Plate used to be.n
The high stiffness direction in timber is along the grain, and a long beam has the grain running along the length of the beam. Below is the image of the timber frame. The Header/Footer Rails are oriented along the X axis, so the orthotropic properties are appropriate for those two beams, but the five studs are along the Y axis but nothing has been done to align the material coordinate system to have the high stiffness along that axis. This model is simulating the grain running across the thickness of the stud which is wrong. nI wasn't getting realistic action at the joints.nI recommend you delete the nails and the holes in the footings and studs and replace them with an actual joint, such as a Revolute Joint. In the image below, you can see that I have arranged the Z axis of rotation to be aligned along the right edge at the bottom of the stud. Put the revolute axis at the left edge at the top of the stud. This will create the correct hinge points for the joint action you want as the frame is put under the shear load.nIf you take this approach, you can delete all the contact between the studs and the footer/header rails.nWhen you delete all the holes from the studs and footer/header, the mesh will improve.nMake sure that every solid body has at least two elements through the thickness, such as the Load Plate shown below.nA better Idea is to delete the Load Plate and just push on the end face of the Header Rail. You can use a Remote Force to position the center of force to the location where the center of the Load Plate used to be.n
You are navigating away from the AIS Discovery experience