Q1 (a) (b) Necking is a common phenomenon of ductile materials. It can be observed through the negative gradient of stre

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Q1 A B Necking Is A Common Phenomenon Of Ductile Materials It Can Be Observed Through The Negative Gradient Of Stre 1 (24.49 KiB) Viewed 89 times

Q1 (a) (b) Necking is a common phenomenon of ductile materials. It can be observed through the negative gradient of stress-strain curve at the plastic region when the applied force exceeding the ultimate stress. Discuss the relationship of necking with Poisson's ratio. (4 marks) Figure Q1 shows ceramic specimens subjected to the pure uniaxial force. Specimen A is compressed until failure at the maximum compressive force, Fe 31.12 kN. Meanwhile, specimen B experiences tension that reached the maximum tensile force, Ft 4.98 kN. The surface area perpendicular to the force has the size of 8.5 mm width and 100 mm length. (1) (ii) Determine the important parameters of a R, Gas and G. Then, plot Mohr's circle for specimens A and B at the same t-o plane. (11 marks) Describe THREE (3) observation on Mohr's circle for specimens A and B. (6 marks) (iii) If the orientation of element is set at 0,15° and 9, 30°, discuss the changes that may occur to Mohr's circle. (4 marks)
FekN Specimen A F₁ kN Specimen B