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PolymerFEM
United States
เข้าร่วมเมื่อ 6 ก.ย. 2020
Tutorials about the MCalibration and PolyUMod software from PolymerFEM LLC.
LS-DYNA MAT_Ogden_Rubber Model Theory
This video discusses the linear viscoelastic implementation that is used in the LS-DYNA *MAT_OGDEN_RUBBER material model. As I explain in the video, this model does not use a Prony series to represent the viscoelasticity. Instead it uses the complete shear relaxation modulus terms. This has some numerical advantages.
มุมมอง: 636
วีดีโอ
How to Edit Experimental Data using MCalibration
มุมมอง 3556 หลายเดือนก่อน
This video demonstrates how you can edit and clean experimental data using MCalibration. Most raw experimental data files are not suitable for material model calibration, in this video I will explain how to quickly fix those files.
Local Minima Make Material Model Calibration
มุมมอง 2076 หลายเดือนก่อน
Did you know that using a gradient descent optimization approach to material model calibration sometimes works terrible, simply because of issues related to local minima of the error function. In this video I will discuss this topic and show how to work around it!
Continuum Mechanics 5: Strain Calculation Using Jupyter
มุมมอง 6636 หลายเดือนก่อน
This video shows how you can calculate different large strain measures in simple shear using a Jupyter notebook. The purpose is to show how to quickly evaluate tensorial quantities using Python.
Quick Introduction to MCalibration [2024]
มุมมอง 5907 หลายเดือนก่อน
A quick 10 minute introduction to how to calibrate a viscoplastic material model using the MCalibration software.
Is it Possible to Predict the High Strain Rate Response from Temperature Sweep Data?
มุมมอง 2807 หลายเดือนก่อน
Some polymers have a yield stress that is linearly dependent on the logarithm of the strain rate, for some other polymers the yield stress is bi-linearly dependent on the log of the strain rate. This difference can be very important when trying to decide if you should perform high strain rate experimental testing. In this video I will show how temperature sweep data of the storage and loss modu...
The Glass Transition Temperature Depends on the Loading Rate
มุมมอง 2497 หลายเดือนก่อน
This video demonstrates how the glass transition temperature (Tg) depends on loading rate by examining stress relaxation data using MCalibration.
Continuum Mechanics 4: Strains
มุมมอง 7157 หลายเดือนก่อน
This video is part 4 in my series on continuum mechanics. The focus is on on how to define and calculate different types of strains based on the Green-Lagrange deformation tensors.
Are Large Language Models Useful for Polymer Mechanics? (2023)
มุมมอง 3568 หลายเดือนก่อน
This video examines how useful ChatGPT-4 and other LLM are for explaining polymer mechanics theories. Are these tools you should us?
Continuum Mechanics 3: Spectral Decomposition of the Deformation Gradient
มุมมอง 6438 หลายเดือนก่อน
This video is part 3 in my series on continuum mechanics. The focus is on the spectral decomposition of the deformation gradient, and the left and right Cauchy Green tensors.
Deep Neural Network Hyperelasticity
มุมมอง 8208 หลายเดือนก่อน
Deep Neural Networks is a powerful Machine Learning method. In this video I will show how to create a hyperelastic model using ML. I will show the complete Python code for the implementation and I will demonstrate some of the weaknesses of the approach.
Continuum Mechanics Part 2: Invariants
มุมมอง 1.1K8 หลายเดือนก่อน
This video is part 2 in my series on continuum mechanics. The focus is on vectors, tensors, and invariants. These concepts will be used in future videos in the series.
Continuum Mechanics Part 1: Why the Deformation Gradient is Important
มุมมอง 1.9K9 หลายเดือนก่อน
This video is part one of my series on continuum mechanics. The focus is on kinematics and the deformation gradient.
Abaqus Marlow and Ansys Response Function Hyperelasticity
มุมมอง 4069 หลายเดือนก่อน
In this video I will discuss the theory for the Abaqus Marlow and Ansys Response Function Hyperelastic Models. I will show that these models are easy to use, but not necessarily better than any of the other I1-based hyperelastic models.
MCalibration Strain Control
มุมมอง 3019 หลายเดือนก่อน
When calibrating a material model it is important to select the correct type of strain control in MCalibration. In a traditional compression test it is not possible to get tensile stresses, and you can achieve this also in MCalibration by selecting "strain control compression" as the control variable. Similarly, in a tension test of a thin specimen you cannot get a compressive stresses, and you...
How to Calibrate and Use a Temperature-Dependent Ansys TNM
มุมมอง 3319 หลายเดือนก่อน
How to Calibrate and Use a Temperature-Dependent Ansys TNM
Repeated Experimental Testing for Material Model Calibration
มุมมอง 26810 หลายเดือนก่อน
Repeated Experimental Testing for Material Model Calibration
Why MCalibration is using a Different Prony Series
มุมมอง 38110 หลายเดือนก่อน
Why MCalibration is using a Different Prony Series
Best Material Model for Polycarbonate (PC)
มุมมอง 39310 หลายเดือนก่อน
Best Material Model for Polycarbonate (PC)
Temperature-Dependent Thermal Expansion in the PolyUMod TNV
มุมมอง 18110 หลายเดือนก่อน
Temperature-Dependent Thermal Expansion in the PolyUMod TNV
Temperature Testing for Material Model Calibration
มุมมอง 16911 หลายเดือนก่อน
Temperature Testing for Material Model Calibration
Best Material Model for Polyetherimide (PEI)
มุมมอง 27311 หลายเดือนก่อน
Best Material Model for Polyetherimide (PEI)
The Stress Concentration for Plate with a Hole is NOT 3.
มุมมอง 50011 หลายเดือนก่อน
The Stress Concentration for Plate with a Hole is NOT 3.
Use Transverse Strain Data in a Material Model Calibration
มุมมอง 22511 หลายเดือนก่อน
Use Transverse Strain Data in a Material Model Calibration
How to Know if a Material is Linear Viscoelastic
มุมมอง 1.1Kปีที่แล้ว
How to Know if a Material is Linear Viscoelastic
Configurational Mechanics and Crack Driving Forces
มุมมอง 661ปีที่แล้ว
Configurational Mechanics and Crack Driving Forces
Material Models for Shape Memory Polymers
มุมมอง 766ปีที่แล้ว
Material Models for Shape Memory Polymers