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  1. Vxxxxx

    Positive/negative sign of cutting force

    Hi, I have a question regarding the positive/negative sign of cutting force in 2D cutting simulation. I set the tool as rigid body and give a velocity on a reference point at the tip of the tool. The cutting force in X direction should be positive as it is the reaction force from the...
  2. Vxxxxx

    MC model concept

    Hi, just one quick question. Since I only provide cohesion(c) and dilation angle(ϕ) to ABAQUS, does that mean ABAQUS monitor the hydrostatic stress during the simulation process and determine the yield stress? Thank you.
  3. Vxxxxx

    Drucker Prager 3D model parameters

    Hi, I am in urgent to find out what should i use for yield stress in drucker prager hardening. I managed to convert MC parameters to DP parameters for 2D using ABAQUS guide, but its different for 3D model. According to this page, it says that I can get beta, K and compressive stress sigma...
  4. Vxxxxx

    Nodal temperature dropped right after the start of simulation

    Hi, I am doing a 3D cutting of a certain material. I set my initial temperature to 293K for both the tool and workpiece by usiing predetermined field(for initial step). I tried to extract the nodal temperature of tool tip and I realised that the temperature dropped drastically right after the...
  5. Vxxxxx

    Tool penetrating inner elements of workpiece

    Hi! I am conducting 3D cutting simulation but my tool is penetrating inner elements of the workpiece. Here are some settings that I used: Step: Dynamic, temp-disp, explicit Contact: general contact I used to have this problem in 2D simulation but this forum helped solving that problem by...
  6. Vxxxxx

    Fracture energy value for shear damage

    Hi, I am conducting a 2d cutting simulation of a certain material, and I calculated the fracture energy from the shear stress-strain curve according to this formula provided by abaqus documentation. (https://abaqus-docs.mit.edu/2017/English/SIMACAEMATRefMap/simamat-c-damageevolductile.htm)...
  7. Vxxxxx

    Element distortion in 3D machining

    Hi everyone, Im trying to realise ultrasonic machining of a certain material, but I encountered element distortion problem for my 3D simulation. I had no problem on 2D simulation, and I used the same material properties for 3D. Drucker prager plasticity shear damage general contact...
  8. Vxxxxx

    Drucker Prager Hardening model and Shear damage

    Hi everyone, First, I would like to ask about the conversion between compressive and shear yield strength. is it possible to convert compressive yield strength to shear yield strength for D-P criteria? Second, for shear damage, the fracture strain means fracture strain from a shear test or...
  9. Vxxxxx

    Split Hopkinson Pressure Bar experiment results for a Drucker Prager model

    Hi, I am planning to conduct Split Hopkinson Pressure Bar experiment on a certain material to obtain stress-strain plot under high strain rates. As for my material model, I am using Drucker Prager plasticity and Shear damage. Right now, I am planning to extract fracture strain data(for shear...
  10. Vxxxxx

    Air convection during machining

    Hi, I am conducting orthogonal cutting simulation of a temperature-sensitive material. I am trying to lower the temperature of first deformation zone of my workpiece as the temperature from simulation is way higher than that of experimental results. The machining experiment is conducted under...
  11. Vxxxxx

    2d cutting simulation: ways to output temperature

    Hi, I am conducting 2D orthogonal cutting simulation and I would like to examine the effects of cutting parameter on workpiece temperature. I can output tool tip temperature but I would prefer the data of highest temperature inside the primary shear zone, but since the tool cuts and chip...
  12. Vxxxxx

    Cutting force comparison method

    Hi, I am conducting 2D orthogonal cutting of certain material and I want to compare the results of cutting force from different cutting speed. So for example, I have using 50mm/s,100mm/s and 150mm/s, my question is, should I take cutting distance or the step time constant? If I take the same...
  13. Vxxxxx

    Abaqus file compatibility

    Just a quick question: Can I open my ABAQUS2019 cae file in ABAQUS 2020/2021? Thank you.
  14. Vxxxxx

    Cutting force graph of elliptical vibration cutting

    Hi, I dont know how to interpret the graph of main cutting force (Fx) for elliptical vibration cutting process. For normal orthogonal cutting, Fx value goes up and down but remains above zero value. But for elliptical vibration cutting, Fx value fluctuates periodically in the range from max...
  15. Vxxxxx

    Influence of tool material conductivity on calculation time

    Hi everyone, two cutting simulations here. Everything's same except tool material. Both dynamic, temp-disp, explicit. Simulation 1, I used tool material A, which has the conductivity of 120. Sinulation 2, I used tool material B, which has the conductivity of 1000, 9 times larger than material...
  16. Vxxxxx

    Fracture Strain (Shear Damage)

    Hi, I am using Shear Damage and I would like to know which strain is Fracture Strain defined in ABAQUS. Red or Blue? Thank you.
  17. Vxxxxx

    Simulation at micro scale

    Hi, I have done simulation on othorgonal cutting of a certain material, and the size of my workpiece is 1x5 mm. So right now, I have trying to do the same on a microscale level, size of my workpiece is 0.15x0.05mm, but it doesnt converge,takes unreasonable calculation time and shows this common...
  18. Vxxxxx

    Configuring Abaqus to Run Fortran Subroutines

    Hi, I am trying to configure abaqus to run Fortran subroutines, but failed. Here are the errors after I run abaqus verification: Abaqus/Standard with user subroutines ...ERROR Abaqus did not complete successfully. Please see std_user.log for details...
  19. Vxxxxx

    Sinusoidal motion of tool

    Hi, I am trying to realise sinusoidal motion of my tool and at the same time, my tool is vibrating elliptically. Right now, I am using Displacement on the reference point of my tool, initial step all 0, step 1 allow X and Y to move. For the vibration of the tool, I use Velocity with Periodic...
  20. Vxxxxx

    Simulation of micro-texturing by using elliptical vibration cutting

    Hi, I am wondering if ABAQUS is possible to realise micro-texturing simulation by using elliptical vibration cutting. I am aware that most of the simulation for micro-texturing are done on MATLAB but I would like to simulation the cutting process by using elliptical vibration cutting. I am...

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