The stress distribution according to vonMises all values are positive (square root of sum of squares). Concepts of the effective width, Code allowable values In reality the maximum compression stress in T-section varies with distance from section Web. ![]() (a) one-way slab Beam Beam (b) two-way slab Beam Beam Beam Beam 8.3. and see the stress distribution in the beam cross section at any or ALL elements simultaneosly, at the beginning, at the end, middle, etc. the part of the beam projecting below the slab forms is what is called web or stem. This way you can plot vonMises stress, axial stress, shear stress, etc. In FEMAP we have a postprocessing utility named BEAM CROSS SECTION STRESS CONTROL that computes the local stress distribution in the cross section of CBEAM elements based in the resulting beam forces & moments computed at each element by ANY FEA solver (not only NX NASTRAN). You can plot also stresses at recovery points, ie, in the corner points. For instance, the plot we have in FEMAP is combined stress " axial + bending" at End_A or End_B of each element. When you plot results in CBEAM elements is tricky, please remember that this is a 1-D line element, and the stress is CONSTANT in the element, beams are not discrete elements. RE: Beam Analysis: Beam cross section view different nature of stress at different beam length rb1957 (Aerospace) 12 Oct 17 11:52 I have attached the problem and NX results. When forces cause a compression of an object, we call it a compressive stress. When forces pull on an object and cause its elongation, like the stretching of an elastic band, we call such stress a tensile stress. ![]() I cross checked using few other problems also and getting the same type of results. Stress is generally defined as force per unit area. Also when I see the beam cross section view, at element near beam centre it shows, top fibers in compression and bottom fibers in tension while when I choose an element near beam ends, it shows top fibers in tension and bottom fibers in compression.Ĭan anyone explain why am I getting theses kind of results or is my understanding wrong and I am supposed to get theses kind of results only. The contour plots I get from NX 11.0, shows that the stress is negative near the centre of beam length and positive near the two corners. compressive at top fibers and tensile at bottom fibers. Since the load is acting same (downward) through out the beam, I understand that the nature of stress should be same through out the beam i.ie. I am doing a problem of I bean subjected to uniform transverse load actiong downward on beams.
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