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mohajerb@uwindsor.ca

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mohajerb@uwindsor.ca last won the day on May 29 2014

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About mohajerb@uwindsor.ca

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  1. Hello I was wondering if I can do wire arc Additive manufacturing simulation with Hyper works package. If yes which simulation tool can I use. I appreciate your advise
  2. Hello I was wondering if I can do wire arc Additive manufacturing simulation with Hyper works package. If yes which simulation tool can I use. I appreciate your advise
  3. My question is how can I assign the component to the new coordinate system I have defined??
  4. I have a component that I want to constraint in all degrees of freedom except a direction which is in (for instance z direction of new coordinate system I have defined) Would you please give me guidance how I can constrain the model? ( I am working in Optistruct) Thank you
  5. A brief description about the project: There is a clip which should passes through the sheet metal slot. The clip is made of plastic. We are looking for the the required force Case#1 straight installation force Case#2 Straight removal force Which means that the displacement is known and We are looking for the required force Unloaded condition of clip (Below is the initial state, before clip is deflected as it passes through the sheet metal slot) Case#1 The leafscreen is pressed into the sheet metal so that the barb of the clip passes through the slot. Need to know max load for clip to deflect and slip into sheet metal slot for all iterations.
  6. In topology optimization when minimizing compliance for specified volume fraction, the maximum deflection of optimized structure is less than the maximum deflection of original structure? based on this formula For constant F when compliance is minimized U( deflection) should be minimized and vice versa. but in this formula volume fraction is not considered. I don't understand the concept of minimum compliance. The compliance of the optimized structure which is lighter than the original structure (since some material is removed from it) is even less than the original structure??!!
  7. In topology optimization when minimizing compliance for specified volume fraction, the maximum deflection of optimized structure is less than the maximum deflection of original structure? based on this formula For constant F when compliance is minimized U( deflection) should be minimized and vice versa. but in this formula volume fraction is not considered. I don't understand the concept of minimum compliance. The compliance of the optimized structure which is lighter than the original structure (since some material is removed from it) is even less than the original structure??!!
  8. After performing topology optimization, I don't know the stress contour and displacement contour for the optimized structure ( Last iteration) are for which iso value specifically? Because by changing the iso value the structure modifies, however the stress and displacement contour for the last iteration stay unchanged. In Hyper view there are two sub cases one is design and the other is static analysis. In design sub case we can see all iterations of optimization with respect user defined iso value. In static sub case which my question is about. The static analysis results (displacement and von misses stress) are only available for two iteration (zero iteration and last iteration). I was wondering this plotted displacement and Von Misses stress contour for the last iteration is with respect to what iso value number. Normally for any specified iso value for specific iteration we should have unique stress and displacement contour because by specifying any iso value we are weakening or strengthening the structure. But here in Hyper view for the last iteration there is only one displacement and stress contour and it is not clear for which iso value are these contours! I did attach two pictures from first and last iterations respectively First iteration Last iteration optimized structure (last iteration Iso value=0.5) Optimized structure (last iteration, Iso value 0.2) I want to know the displacement contour (second picture) is for structure with iso value of 0.2 or 0.5 or any other values Thank you in advance
  9. after performing topology optimization, I don't know the stress contour and displacement contour for the optimized structure ( Last iteration) are for which iso value specifically? Because by changing the iso value the structure modifies, however the stress and displacement contour for the last iteration stay unchanged.
  10. Thanks for your reply. No I haven't used stress constraint. I have used volume fraction constraint. I have limited the upper bound of volume fraction and the objective is minimizing compliance. I don't understand the relation between this decrease in displacement and increase in stress. Is that something related to shape functions? What is the theory behind that?
  11. after performing topology optimization, I don't know the stress contour and displacement contour for the optimized structure ( Last iteration) are for which iso value specifically? Because by changing the iso value the structure modifies, however the stress and displacement contour for the last iteration stay unchanged.
  12. In topology optimization problems with objective of minimizing compliance, we minimize the compliance which means the maximum deflection is decreased in the optimized structure. Then why the stress increases? Is the optimized structure (minimized compliance) really stiffer than the original structure? How can we justify this increase in stresses? I don't understand how the displacement decreases, stress increases and stiffness is maximized.
  13. After performing topology optimization when using Hyperview to see the results, In static analysis result page we have stress and displacement. I want to know that the demonstrated stress and displacement for las iteration are for wich iso value? I don't understand how should I determine the value of iso value? For example 0.3 is better or 0.5 ? and the displacement and stress demonstrated are for structure with iso value of for instance 0.3 or 0.5? Why the static analysis results (stress and displacement) is different from results of iteration 0 in optmization? Thanks in advance for your reply
  14. How can I determine the volume fraction constraint? Which criteria should I consider for determining that? How can I understand the volume fraction constraint of 0.15 is better or 0.30 or any other value
  15. Actually my objective is combining Structural optimization (not only structural analysis) while the structure is also thermally loaded. The OS-1080 has combine both structural and thermal analysis. I was wondering if that is possible?
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