Mastering Nonlinear and Dynamic Analysis in CAE Simulation Using SolidWorks

SolidWorks has transformed how engineers analyze complex material behaviors and structural deformations. This blog, part of the CAE Simulation using SolidWorks series, focuses on nonlinear and dynamic analysis. We’ll explore their differences, dive into practical applications, and demonstrate how to set up simulations in SolidWorks for accurate results. Whether you’re a student or a professional, this guide will enhance your understanding of advanced CAE concepts. 

Static vs. Dynamic Analysis in SolidWorks 

Understanding when to use static or dynamic analysis is crucial in SolidWorks simulation training. Here’s a quick comparison: 

Static Analysis 

Characteristics: Assumes forces are time-independent. The solver only calculates final deformations, and intermediate results are not reliable. 

• Use Case: Suitable for scenarios where loads are steady or quasi-static. 
• Example: Bending a cantilever beam under constant force. 

Dynamic Analysis 

• Characteristics: Considers time-dependent forces, capturing changes in velocity, acceleration, and deformation over time. 
• Use Case: Ideal for scenarios involving vibration, impact, or time-varying loads. 
• Example: Analyzing stress on a beam under oscillating loads. 

Dynamic analysis provides more detailed insights but requires significantly more computational effort compared to static analysis. SolidWorks CAE simulation tools streamline both types of analyses, ensuring accurate results with reduced complexity. 

The Importance of Nonlinear Analysis 

Nonlinear analysis is indispensable for accurately modeling material and geometric behavior that deviates from linear assumptions. In static analysis, relationships between stress and strain are often linear, valid only within the elastic limit. Beyond this point, nonlinear effects dominate, requiring specialized analysis. 

Types of Nonlinearities

Geometric Nonlinearities: 

• Occur when large deformations alter the geometry of the model. 
• Example: A cantilever beam bending under extreme force. 

Material Nonlinearities: 

• Arise from behaviors like plastic deformation or creep. 
• Example: Metals exceeding their elastic limit or rubber under high loads. 

Contact Nonlinearities: 

• Result from changes in contact status between parts. 
• Example: A beam making contact with a block, altering stress contours. 

SolidWorks provides dedicated modules to handle these nonlinearities efficiently, making it a favorite tool in CAE training for mechanical engineers.

Hands-On: Performing a Nonlinear Analysis in SolidWorks 

Let’s walk through a practical example to understand nonlinear and dynamic simulation in SolidWorks. 

Step 1: Create the Model 

• Open SolidWorks and start a new part. 
• Draw a rectangle (50 mm x 150 mm) on the front plane and extrude it to 1000 mm. 
• Ensure all dimensions are set correctly using the Smart Dimension tool. 

Step 2: Setup for Static Analysis 

• Select Simulation > New Study > Static Analysis. 
• Assign a default material (e.g., Alloy Steel) with known properties. 
• Fix one end of the model and apply a downward force of 500 N on the other end. 
• Mesh the model and run the simulation. 

Step 3: Transition to Nonlinear Analysis 

• Increase the applied force by a factor of 100. 
• The solver will detect large deformations and prompt you to switch to a nonlinear analysis. 
• Confirm the prompt and re-run the simulation for accurate results. 

Nonlinear analysis captures effects like geometric changes and material deformation, ensuring realistic results that static analysis cannot provide. 

Dynamic Analysis with 2D Simplification 

SolidWorks’ 2D simplification feature reduces computational effort while maintaining accuracy. Let’s explore how to perform a nonlinear dynamic analysis on a 2D model. 

Step 1: Import the Model 

• Open the provided 3D model. 
• Rotate, zoom, and inspect the geometry for errors. 

Step 2: Setup for 2D Simplification 

• Select New Study > Nonlinear Dynamic > 2D Simplification. 
• Define the plane of symmetry and set the depth (e.g., 0.015 mm) to replicate 3D results. 

Step 3: Define Contacts and Loads 

• Assign appropriate materials to all parts (e.g., Plain Carbon Steel for sheet metal). 
• Fix the die edges and ensure the punch moves downward by 10 mm. 

Gradually apply the load over time, using the dynamic loading curve options. 

Step 4: Run the Simulation 

• Define contact sets to prevent unrealistic interpenetration. 
• Run the simulation and analyze the stress and strain results. 

Dynamic simulations are ideal for capturing time-dependent behaviors, such as stress variation during sheet metal deformation by a punch. 

Choosing the Right Material Model 

Selecting the appropriate material model is vital for accurate results in SolidWorks CAE simulation. Here’s an overview of commonly used models: 

Linear Elastic Isotropic: 

• Assumes constant properties in all directions. 
• Suitable for materials that return to their original shape after unloading. 

Nonlinear Elastic: 

Captures nonlinear behavior while remaining elastic. 

• Plasticity Models: Simulate permanent deformation beyond the elastic limit. 
• Hyperelastic: Ideal for materials like rubber with large deformations. 
• Viscoelastic: Models time-dependent material responses under different loading rates. 

Skill-Lync’s SolidWorks FEA Training includes hands-on exercises with these material models, ensuring students master the art of material selection. 

Why Choose Skill-Lync for SolidWorks CAE Training? 

Skill-Lync’s CAE simulation course equips students with industry-relevant skills through: 

• Practical Projects: Hands-on experience with real-world problems. 
• Expert Guidance: Learn from professionals with extensive experience in SolidWorks simulation. 
• Certified Courses: Boost your resume with recognized certifications like the Skill-Lync Free Certified Course. 

From SolidWorks simulation for beginners to advanced tutorials, Skill-Lync covers everything you need to excel in CAE in SolidWorks.  

Conclusion 

Nonlinear and dynamic analyses are essential tools for engineers dealing with complex material behaviors and structural deformations. SolidWorks simplifies these analyses with its robust CAE simulation tools, allowing engineers to achieve precise and reliable results. 

With Skill-Lync’s CAE training, you can master the art of simulation, explore advanced concepts, and solve challenging engineering problems. Start your journey today with the Skill-Lync SolidWorks course and redefine your engineering career! 

This blog is part of our ongoing CAE Simulation using SolidWorks. If you missed the previous posts, check them out here.  

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Skill-Lync has released a FREE comprehensive course covering CAE Simulation using SolidWorks: Beginner to Advanced Tutorial in detail! Check it out here.

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