A laminated plastic beam of square cross section is built up by gluing together three strips, each 20 mm x 60 mm in cross section (see figure). The beam has a total weight of 4.6 N and is simply supported with span length L = 460 mm. Considering the weight of the beam (q) calculate the maximum permissible CCW moment M that may be placed at the right support. (a) If the allowable shear stress in the glued joints is 0.4 MPa. Round to the nearest tenth. Mmax = __ N • m (b) If the allowable bending stress in the plastic is 8 MPa. Round to the nearest hundredth. Mmax = __ N • m
A laminated plastic beam of square cross section is built up by gluing together three strips, each 20 mm x 60 mm in cross section (see figure). The beam has a total weight of 4.6 N and is simply supported with span length L = 460 mm. Considering the weight of the beam (q) calculate the maximum permissible CCW moment M that may be placed at the right support. (a) If the allowable shear stress in the glued joints is 0.4 MPa. Round to the nearest tenth. Mmax = __ N • m (b) If the allowable bending stress in the plastic is 8 MPa. Round to the nearest hundredth. Mmax = __ N • m
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A laminated plastic beam of square cross section is built up by gluing together three strips, each 20 mm x 60 mm in cross section (see figure). The beam has a total weight of 4.6 N and is simply supported with span length L = 460 mm.
Considering the weight of the beam (q) calculate the maximum permissible CCW moment M that may be placed at the right support.
(a) If the allowable shear stress in the glued joints is 0.4 MPa. Round to the nearest tenth.
Mmax = __ N • m
(b) If the allowable bending stress in the plastic is 8 MPa. Round to the nearest hundredth.
Mmax = __ N • m
Transcribed Image Text:M
†20 mm
20 mm 60'mm
20 mm
L
60 mm
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