Well, there is nonlinear static and nonlinear dynamic; which do you mean?
Static/Dynamic means Time Independent/Dependent. For example, imagine you have a mass-spring-dampener system at rest and then you set another mass on top of it. A static analysis will give you the new conditions when the system is at rest; a dynamic analysis will give you the conditions going from the initial state to the final state.
Linear/Nonlinear relates to the physics being simulated. Everything in the real-world is pretty much nonlinear, but under the right conditions, a linear model will provide a (very) good approximation. Common nonlinear conditions are material (elastoplastic, hyperelastic, viscoelastic, etc), path dependent solutions (contact and friction), geometric (large displacements and strains, follower forces, etc.), and coupled systems (fluid-structure interaction for example).
You can have any combination between the two sets, giving four types:
- Linear Static
- Linear Dynamic
- Nonlinear Static
- Nonlinear Dynamic
Which one you'd use depends on what you need to capture in your system from a solution standpoint.
Isotropic materials are those who's properties are direction-independent. In a cube of homogenous A-36 steel, the Young's Modulus, Poisson's Ratio, density, etc. is completely independent of the direction. If there was a XYZ coordinate system at the center of the cube, then the material properties will be the same whether I move along the x-axis, the y-axis, the z-axis, or some combination of the three.
Anisotropic materials are the opposite of isotropic materials; the material properties are direction-dependent. A good example of an anisotropic material is wood.
just to add to this, the defintiions used in solidworks simulation are the standard defintiions for both
it might help if you give us the context of your question so that we can answer in context rather than just defininig the definitions
thank you Shaun Densberger and Jared Conway.
I’m so glad that you respond my question. Usually, I just use CAD of Solidwork. But now, I have to validate my design using SolidWork simulation. So, I’m a beginner. Thank you ... for explaining me what i’ve asked. But, i still don’t understand how they are work for simulation.
Here is the description about the design project that will validate by CAE in solidwork.
There’s a building which has a front yard. The yard will be covered by canopy, so it will be protected from sun or rain. But the canopy planned can be opened using sliding mechanism.
The canopy us planned to be divided into 7 segments. There’re 3 segment which fix, and 2 segments (for each left and right) which sliding. Slide mechanism helped with wheel and rail. And the actuator used for automation is motor and for pulling the sliding canopy, i use wire rope.
Here is the free body diagram for the sliding canopy
The motor constructed to has 2 direction (clockwise and counterclockwise). When the motor turn counterclockwise, the sliding segments will make the canopy close and if the motor turn counterclockwise, the sliding segments will open.
- If we ignore the resistance that caused by the wire rope, can we simulate the movement caused by the weight of the 2 segments of canopy (W1), slope 10 degree, and the gravity?
- If we ignore the wire rope, the acceleration (a) tends to move to the right. But if we expect the acceleration (aa) to move to the left (caused by wire rope), and the aa is slower than a, can we still simulate the movement and make sure the canopy will open when we stalling the wire rope?
- If you look the concept, what kind of validation that i can use?
here is the modelling that i've done:
here is the joint
here is the building
solidworks motion > export to solidworks simulation
i'd also be looking at some worst case buckling and static simulations or using a design study to find which ones are the worst
can you give me an example and the steps for exporting solidworks motion result to solidworks simulation?
Usually, I just use CAD of Solidwork. But now, I have to validate my design using SolidWork simulation.
What exactly do mean by 'validate'? How are you going to use the results from a simulation?
the validation which i mean is how to proove my design will not fail when receive the load by using the result from simulation
If the real structure were to fail, could someone be hurt/killed?
yes, people which stand under the canopy could be hurt/killed if the real structure fail. FYI, the purpose of making the canopy can be opened is the yard can be used as a room when the capacity inside the building is full. so, it's important to make the structure safe.
I very strongly suggest you use a different method for validating your design. It's incredibly dangerous to use FEA to validate a design without a well experienced analyst using a robust FEA code. Even with an well experienced analyst and a robust FEA code, it's very rare that FEA by itself is used as the method for validation.
This design has to be analized and tested by a licensed engineer. This type of thing in the hands of a designer is not the intended use of SolidWorks Simulation.
i'm with shaun here to an extent
i think fea and solidworks simluation can certainly be used to understand the state of the structure and design alternatives
but it should definitely be backed up by other calculations, experience and testing
and would also highly agree that it needs to be done by someone that understands the assumptions made in the analysis to quantify/qualify the results