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120_Mechanics Homework Mechanics of Materials Solution

# 120_Mechanics Homework Mechanics of Materials Solution - L...

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Unformatted text preview: L O PROBLEM 2.77 2.77 Two blocks of rubber, each of width w = 60 mm, are bonded to rigid supports and to the movable plate AB. Knowing that a force of magnitude P = 19 RN causes a deﬂection 6= 3 mm, determine the modulus of rigidity of the rubber used. SOLUTION Consider Upper impeach 6F TOLL”. T‘e‘Foﬁce + F5 It? ecu/Mien) 1‘1. -k‘P. if: I I The» ahead-ac: \$412.55 is EPiP 151:1: Acéﬁen P A 030 MHDC'éoh-h) = 10.3 #03 Pm: -— “3.8 “10.3 Ima- “Mos N = Li: CH."°__3) = 0.37%3NO‘ P6. 10.8 x [0'5 -12.“: 'SS’MM 0.085714 -‘ "—"r—Oﬂﬁi’ﬁ'o -- io.2s~o‘ 124 = 10.26 ”Pm 2.78 Two blocks of rubber, for which G = 7.5 MPa, are bonded to rigid supports and to the movable plate AB. Knowing that the width of each block is w = 80 mm, determine the effective spring constant, k = PM, of the system. SOLUTION Consider He Upper bﬁook o‘F rubber. The Fame carried 1‘: J52 T1: shad-fin“ aims: is Tle skewing Elwin E‘FFErii'lue aft/{r13 can: +4.41“ Flo-Hm: Hui ’t GTJ k 2 2L _. -(:2)(0.:so)(aosoKzs'x/o‘) _ ai'leO‘ N/‘m h _ 0.035 €.i7x.!03 kN/m ...
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