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Hi All I have a mechanical gripper that its axis is connected and guided by a cam , for me it's important to regulate the speed of the cam , but increasing , the rod might get disconnected from the cam, is the any solution to this problem ?

Hi All I was searching for some mechanisms , for a two finger like gripper that hold a small cylinder, like 5 cm hight and 3 cm diameter , in a high speed, (metal cylinder) , like 2 pieces per second where can I find some Ideas , and do some analysis , how do you suggest me to do the analysis...

Hi All To design a bolt , I just have it's dimensions and the moving limits, how do I design and modify the mechanism ? is this possible in CATIA or ADAMS ? cause in mechanism design , usually forces are the input or the output of the analysis, how can I do this without force? thank you any...

perfect answers thanks to all

Hi All I have to select a C4 stainless steel from a material library ,where the names are given as metalurgic compositions , such as X10Cr13- blabla or DIN or JIS or AISI , and thir min or maximum temperature, how do I know which is the C4 ? also if you introduce a reference about this to me ...

Hi All I would like to know , whether we need to have maintenance in a preventive way , if the induction motor that usually works in a constant speed , 400 V , 40 A ? when it has an inverter that also (I am not fully informed in this area so if you let me know what are the objectives of the...

Hello, What type of modelling in Abaqus do you prefer? I mean when it is recommended to merge geometry from parts into single large part? How often do you use tie constraint? As far I know the effect is almost the same - we can tie together parts of the geometry - we can tie together degrees...

Hi all I was trying to model the chasis of a bike in CATIA , and then do the FEM analysis in abaqus later, but the problem is that when two tubes intersect eachother, that if the section of the tubes are not circular, it would be a problem to mesh the parts , my Idea was to fillet the end of...

Hi All Is there a module called Acknowledgement in CATIA ? because I know the knowledge advisor ,but I doubt if this expression also exists, I was searching for it but no results

Hi All I was studying the Galerkin Method , most of the Material on web and in the books have a difficult presentation of this method, I don't know how I can try to code it , has anyone done this before ? any advices?

Hi All Does anyone know if there is an open source code for FEM that can import an .igs file and give the node coordinates and numbering ?

thank you very much

Anyway thanks a lot for your help and kind attention , still you helped with with some good info , regards

Baretired : thank you , but I think not exaxtly yet , due to some difference in expressing the displacement vectors , the one I have mentioned , in conventional periodic materials , is u = E * x , that E is actually the displacement gradient , as I knew later , not the macroscopic strain so...

and Thanks a lot , that was a perfect and nice link !! thanks !!!!

thanks a lot , well I am talking about homogenization of periodic materials , there to relate the micro mechanics to Macro , we use the concept of displacemnet = macro displacement gradient * coordinat >>>>> u = H * x , so here is my problem , in applying shear load case , I need to know how...

This question is very urgent for me , please be very kind to me and if you know a good reference , please refer me to that source , I will be very grateful

Hi All I need some clarification of the terms : displacement gradient with components H_ij=du_i/dX_j , from which the Average strain ( is it macroscopic strain ??) is achieved : E_ij = 0.5 *(du_i/dx_j + du_j/dx_i). that will always display symmetries since E_ij=E_ji. I am searching to find...

Hi All I need some clarification of the terms : displacement gradient with components H_ij=du_i/dX_j , from which the Average strain ( is it macroscopic strain ??) is achieved : E_ij = 0.5 *(du_i/dx_j + du_j/dx_i). that will always display symmetries since E_ij=E_ji. I am searching to find...

thanks a lot , yes but I from one side doubt if the source I was studying was assuming triangular elements , I think only truss elements so it would be different not ? still I don't get the rule , for triangular is understandable though , for truss , for me , not. here is the source of it ...