Question

Question 4 O out of 12.5 points X Determine the maximum shear stress in MPa) at point B on the cross-section of the beam (w = 78.1 mm) if it is subjected to an internal shear force of 539 KN. Note: Your answer should include requested units and be to 2 decimal places. w w w ? B w Selected Answer: ® [None Given] Correct Answer: 36.57 + 2% (MPa)

Answer 1

3 3 Question 4 to w w B A In the above -0.0.81 m shear force, stress cross sectional beam, w = 78.1 mm Here subjected conternal V=539KN So manimum shear at point Bois , According to formula, shear stress (transverse shear - V.A ý 1.b whene v=shear force A= Area of cross section above the e corresponding point ý = Distance between centre line of seam to above pocht B I= second moment of inentia of beam b= base of beam So T 539x10x10.0781*0.076) x (08781) {ax www.it werew)"}x (0-0781) 539x10²x10.0781 3 x 12. 36.565x100 Pa 36.565 MPa Manimum shear stress at point B is 36.565MPa. area at the point 29x(0.078114

Question: 5 Diameter of bar= 41.5 mm 0.0415 7 - FA B is 2D on Here P=923N, P=40.40m Li= 206mm L2=220mm (The above figure yz plane) Here anial force along positive direction= Psin30° - 2234 1 461.5 N for the transverse force Ploso, there can be a effect on AB AB plane. But me for point MC the bending stress would become zero it is neutral plane of the beam oy which on xy plane. by centre anis beam. Thus normal foaves at point A is, 461.5 8 8 341.050 kPa (0.0415² Am stresses Tx
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