ME2114-solutions.pdf

ME2114

PAGE 3

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QUEsnON2 A beam made ofa metallic aHoy has a stress strain curve as shown in Figure 2a. A moment M is applied to the beam (see Figure 2b) resulting in a maximum strain in its outer fibres of £01I1X = ±O,005.lftbe material behaviour is the same in both tension and compression. detennine the magnitude ofthe moment M. Determine also the final curvature and the residual stresses in its outer fibres after the moment is released.

_ _ _ _ _Tl_le following equation (usual notations apply) maY,_b_c_used __Wl_·_th_o_ut_d_e_ri_vati_·o_n_:_ _ _ _ _ _ _ _ __

Curvature is given by: (J'

E

-=-=­ p Ey y

(25 markJ)

cr (MFa) 250

220

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0.003

Figure2a

0.008

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300mm

Figure2b

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Question 2 Solution

Pg.

NATIONAL UNIVERSITY OF SINGAPORE

Department of Mechanical Engineering

Module Code:

Module

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Pg.

NATIONAL UNIVERSITY OF SINGAPORE

Department of Mechanical Engineering Module Code:

--

Module Title: _ _ _ _ _ _ _ _ _ _ _ __

Solution to Question No. _ _

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