mid surface meshing-property
Altair EmployeeAnswers
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Since we are creating the 2D elements for a mid surface, to represent the exact geometry the thickness has to be assigned.
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assuming that you might know why we do mesh at mid-surface rather mesh it on the outer or inner surface, i directly come to ur question about thickness.
1. Our meshing should always represent the geometry because the stiffness matrix varies with respective to the geometry, shape and size(in x,y,z ) on which the stress and defections values are based.
2. irrespective of element type Software requires all 3 dimensions to run an analysis so, For 1D elements, it contains the information of only 1 dimension(say x) but later while defining the cross-sectional parameters we provide the information of other 2 dimensions (y and z). similarly For 2D elements, it contains info of 2 dimensions say x and y, now while assigning thickness we r providing z dimension info. so if u skip defining value even in 1 dimension syntax will fail to execute the analysis request.
there are some rules to be followed before judging the right element type... but it is irrelevant to the question you u posted so, i'm not discussing it here..
hope it was clear ! .
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Altair Forum User said:
assuming that you might know why we do mesh at mid-surface rather mesh it on the outer or inner surface, i directly come to ur question about thickness.
1. Our meshing should always represent the geometry because the stiffness matrix varies with respective to the geometry, shape and size(in x,y,z ) on which the stress and defections values are based.
2. irrespective of element type Software requires all 3 dimensions to run an analysis so, For 1D elements, it contains the information of only 1 dimension(say x) but later while defining the cross-sectional parameters we provide the information of other 2 dimensions (y and z). similarly For 2D elements, it contains info of 2 dimensions say x and y, now while assigning thickness we r providing z dimension info. so if u skip defining value even in 1 dimension syntax will fail to execute the analysis request.
there are some rules to be followed before judging the right element type... but it is irrelevant to the question you u posted so, i'm not discussing it here..
hope it was clear ! .
perfectly well
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Altair Forum User said:
perfectly well
come up with more questions ...
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why we do mesh at mid-surface rather mesh it on the outer or inner surface and add the thickness to it?
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why we do mesh at mid-surface rather mesh it on the outer or inner surface and add the thickness to it?
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If you mesh on outer surfs, you need to set z-off to make outer of mesh to match the surfs.
If you mesh on midsurface, don't need z-off
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