Question

PROBLEMS Chapter 6 6.2 Composite Beams introductory Problems 6.21 A compnite beam is constructod uing a steet 150mrai osether sode The wood and teel are securely fasiened to act an a singlie bearm The beam ia sabjected 623 A compoaite beam conoining of fiberglas to a positrve beadieg momen A. -675N-n.Cal. fxes and a core of pactihle board has the crosssectioun cuine the ma si murnonsle and corpwave gresurs " ,hown in the figure 1 he width d ihe hear, 9hnn, he uood andxieelE-11 GPaand E, -200 GPs the thicknessof the laces is 3 mes and the thickness of the core is 14 nm The beam is subjeced to a beiding Find the xisnun beding stcesseso, sndo, in the facec and the coec, respectively, if their respectine bean is strengthened using two sted Pon as shown in Fig a The beam hani simgle sup po ts and an overhang and is sabjected to a poist oad asd a sndors load as shown in Fig h Calculate the masimurs tensile and conpeesive stressies of the team Asume that E-11 GPa and E, 200 GP 624 A wond beun with cross-sectiosal inen icas 500 m 300 mms is reinforced on its siles bs teel pvies 12 ne thick (see furel. The moduh of elasticity for the steel and wood are E,-1su GPa and & -11 GP, respectively. Alho, the coere sposding allowable stresses are o,110 MIs and tal Cakulee the massmsm pemassitle beradisg onet M whetn the bears is hem about the tby Ropes parn tnt if he beam is eow beut about ne tc) Find the required thakeess of the steel plues on the bewn beet shoun the y soon so then. s32

please assist with problem 6.2-2

Answer 1

loadi 3-2CN-m 3 m Im 9.6 KN 18 1333 N RA 1.4661 KN monent. mne to eNMR346 N o x1o N-MM az" Bending Cnss-sectio st 20o 150 00 5-5mm 200 equ'valent coss-sechion too INA,下 55X1503 8851,275 Mm" (50 885し275 8851235