Question

A bar of 15mm x 15mm square cross-section is machined so as to reduce the thickness in a central region to 5mm, as shown in Figure 5. The bar is now subjected to a force F=2kN whose line of action passes through the centroid of the original square section. Sketch the distribution of stress in the reduced section and find the maximum tensile stress. By what factor does this exceed the average normal stress in the original section?

6. A bar of 15 mm x 15 mm square cross-section is machined so as to reduce the thickness in a central region to 5 mm, as shown in Figure 5. The bar is now subjected to a force F= 2 KN whose line of action passes through the centroid of the original square section. Sketch the distribution of stress in the reduced section and find the maximum tensile stress. By what factor does this exceed the average normal stress in the original section? Fig. 5

Answer 1

6ivn dat ARea 5x tmm force F2 KN e Smm To find xdistvibution ot vd uced sectim the manimum t ongile stres 24what fauto dos the evaray exceed the Riginal normal sectim striss the in Soution eESm M Fe 2 000 x S 1 M Y 2000 1 (5 IS XIS 12 2 ODO 1 26.66 64y 6Man 8G.6 np Y

133.35 MPa 86.6a Mpa original sechron In the & &89 MPa 20D0 man o AD 6man 8.09 man
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