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Hi, Thank you very much for your answer. Yes, it is bouncing off and flying away. I am trying to model a pile penetrate into soil by an impact force. I am following a research paper and they penetrate the pile into soil with same material properties, loading, and contacts. They did not specially...

Hello, I am trying to model a pile penetrate into soil media. I modeled the problem with Abaqus and ran with no errors. I used Axisymmetric elements (CAX4R) to model both pile and soil also introduced the contract between soil and pile. An impact load was applied on top of the pile which lasts...

Hello, I am trying to model a pile penetrate into soil media. I modeled the problem with Abaqus and ran with no errors. I used Axisymmetric elements (CAX4R) to model both pile and soil also introduced the contract between soil and pile. An impact load was applied on top of the pile which lasts...

Hello, I am working with Abaqus Explicit to simulate ground wave propagation. Before applying dynamic step I want to establish initial in-situ stress of the soil. Can I use the explicit step to input gravity as a body force to the model? If I use a geostatic step, I can not use the explicit step...

Hi Jeff and Greg, Thanks for your reply. I could not find any unbonded elements in my model. But still, I have the problem with obtaining frequency related to 95% model mass. I extracted 30 modes and participation factors are added together, the values are very low (e.g. 1.5, 2.3 and 2.0 for...

Hi, Thanks for your reply. I 'll ignore that part. But I have a problem with obtaining frequency related to 95% model mass. I extracted 30 modes and participation factors are added together, the values are very low (e.g. 1.5, 2.3 and 2.0 for three components). Should I want to extract more modes...

Hi, I ran a frequency analysis in Abaqus to find the first natural frequency and frequency related 95% model mass. The obtained participation factors are very much low and also effective mass (e.g - 6.74E9) for the rotation components are larger than the total mass of the model (4.27E7). Can...

Hi, I ran a frequency analysis in Abaqus to find the first natural frequency and frequency related 95% model mass. The obtained participation factors are very much low and also effective mass (e.g - 6.74E9) for the rotation components are larger than the total mass of the model (4.27E7). Can...

Hi, Thanks a lot. But I have some confusions. I cannot find percentage values and also participation factors are shown according to differertn components (e.g. x-component, x-rotation etc). Attached file is the .dat file of the analysis. Thanks in...

Hi, I am conducting a frequency analysis in abaqus to find the 1st frequency and frequency related to 95% model mass of model. I need these values to calculate the Rayleigh damping parameters. Can you tell me how to find this model mass participation factor in Abaqus? Thanks...

Hi, I am conducting a frequency analysis in abaqus to find the 1st frequency and frequency related to 95% model mass of model. I need these values to calculate the Rayleigh damping parameters. Can you tell me how to find this model mass participation factor in Abaqus? Thanks...

Does the problem relate to grouping elements into different layers or some other problems?

Hi Mehdi, Hope this will help. https://www.youtube.com/watch?v=CaTd5ppSPA4&index=11&list=WL https://www.youtube.com/watch?v=T-rla6r1RHg&index=12&list=WL

Hi, Thanks a lot.

Hi, Thank you very much for your time. The problem is once I partitioned up to the boundary it cause a problem when running the model. Boundary consists of the infinite elements and error says "Infinite element 274030 instance PART-1-1 is not properly connected a non-infinite element. It must...

Hi, I changed and tried to get similar mesh (to black and white figure) by introducing seeds but it says can't solve the seeding constraints. Also, I tried with further partitioning the model.Once I partitioned up to the boundary it causes another problem when running the model. Boundary...

Hi, I want to model a pile penetrate into soil media and have a problem with meshing the model. I always get an error saying the elements contained in element set ErrElemExcessDistortion-Step1 have distorted excessively. Previous researchers used a special method by using special shape as shown...

Hi, I want to model a pile penetrate into soil media and have a problem with meshing the model. I always get an error saying the elements contained in element set ErrElemExcessDistortion-Step1 have distorted excessively. Previous researchers used a special method by using special shape as shown...

Dear Mehdi, I used the same method I explained in the problem and convert the ACAX4 elements into CINAX4 in .inp file. Is that the answer you want? Thanks, Kumara.

Hi, I want to model geofoam as infilled material in a ground barrier. I came to know that I have to use VUMAT for that purpose but I don't have an idea how to use it. Can anyone recommend me a reference material to learn about VUMAT? Thanks