SS (a) Briefly describe and contrast the behaviour of brittle and ductile materials when subjected to...

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SS (a) Briefly describe and contrast the behaviour of brittle and ductile materials when subjected to gradually your answer. Also give at least one example of a common material for each type. increasing tension or compression loads until failure occurs. You may use suitable sketches to illustrate (8 marks) (b) A solid steel rod has an original length L, 250 mm and diameter do 20 mm and is rigidly fixed to a support at the upper end while two loads of 50 kN and 60 kN are a applied at the free end at inclinations to the longitudinal axis of the bar as shown in figure 1. (i) Calculate the normal engineering stress at the cross-section X-X. (ii) Calculate the shear stress and strain at the cross-section X-X. (iii) Calculate the longitudinal extension of the bar. 205 GPa and G = 80 GPa. Take: For steel, E= varea = 11134 QUESTION 2 A typical cross-section of a beam has an overall 200 x 100 mm rectangular profile with triangular and circular holes tocated as shown in figure 2. 250 (a) Determine the position of the centroid of the section from the bottom edge. (b) Calculate the moment of inertia leg of the section about a horizontal axis passing through the centroid (8 marks) (15 marks) X 50 KN 30° 45° C/L Figure 1 B Fixed end -20 Dia. rod X 20 200 C- 60 kN All dimensions are in mm 20 100 60 60 (3 marks) (4 marks) (2 marks) 201 Figure 2 -G 20 20 30 70 60 20 SS (a) Briefly describe and contrast the behaviour of brittle and ductile materials when subjected to gradually your answer. Also give at least one example of a common material for each type. increasing tension or compression loads until failure occurs. You may use suitable sketches to illustrate (8 marks) (b) A solid steel rod has an original length L, 250 mm and diameter do 20 mm and is rigidly fixed to a support at the upper end while two loads of 50 kN and 60 kN are a applied at the free end at inclinations to the longitudinal axis of the bar as shown in figure 1. (i) Calculate the normal engineering stress at the cross-section X-X. (ii) Calculate the shear stress and strain at the cross-section X-X. (iii) Calculate the longitudinal extension of the bar. 205 GPa and G = 80 GPa. Take: For steel, E= varea = 11134 QUESTION 2 A typical cross-section of a beam has an overall 200 x 100 mm rectangular profile with triangular and circular holes tocated as shown in figure 2. 250 (a) Determine the position of the centroid of the section from the bottom edge. (b) Calculate the moment of inertia leg of the section about a horizontal axis passing through the centroid (8 marks) (15 marks) X 50 KN 30° 45° C/L Figure 1 B Fixed end -20 Dia. rod X 20 200 C- 60 kN All dimensions are in mm 20 100 60 60 (3 marks) (4 marks) (2 marks) 201 Figure 2 -G 20 20 30 70 60 20

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a Behavior of brittle and ductile materials under tension and compression Brittle materials Tension Brittle materials fail suddenly under tension with ... View the full answer