Mecanica de Materiales - 7ma.Ed_James

Respuestas a los problemas 1003
5.7.4 (a) s A 209.6 MPa; (b) s B 221.0 MPa;
(c) x 0.625 m; (d) s máx 231.0 MPa;
(e) s máx 213.8 MPa
5.7.5 (a) 1 d B /d A 1.5;
(b) s máx s B 32PL/pdB
3
5.7.6 h x h B x/L
5.7.7 b x 2b B x/L
5.7.8 h x h B x/L
5.8.2 (a) t máx 715 kPa, s máx 4.65 MPa
(b) t máx 1430 kPa, s máx 18.6 MPa
5.8.3 M máx 25.4 k-ft
5.8.4 t máx 500 kPa
5.8.5 t máx 2400 psi
5.8.6 (a) L 0 h(s perm /t perm );
(b) L 0 (h/2)(s perm /t perm )
5.8.7 P perm 2.027 k
5.8.8 (a) M máx 72.3 N m
(b) M máx 9.02 N m
5.8.9 (a) viga de 8 12 in
(b) viga de 8 12 in
5.8.10 (a) P 38.0 kN; (b) P 35.6 kN
5.8.11 (a) w 1 121 lb/ft 2 ; (b) w 2 324 lb/ft 2 ;
(c) w perm 121 lb/ft 2
5.8.12 (a) b 87.8 mm (b) b 89.1 mm
5.9.1 d mín 5.7 in
5.9.2 (a) W 28.6 kN; (b) W 38.7 kN
5.9.3 (a) d 10.52 in; (b) d 2.56 in
5.9.4 (a) d 266 mm; (b) d 64 mm
5.10.1 (a) t máx 5795 psi; (b) t mín 4555 psi;
(c) t prom 5714 psi; (d) V alma 28.25 k
5.10.2 (a) t máx 28.43 MPa; (b) t mín 21.86 MPa;
(c) t prom 27.41 MPa; (d) V alma 119.7 kN
5.10.3 (a) t máx 4861 psi; (b) t mín 4202 psi;
(c) t prom 4921 psi; (d) V alma 9.432 k
5.10.4 (a) t máx 32.28 MPa; (b) t mín 21.45 MPa;
(c) t prom 29.24 MPa; (d) V alma 196.1 kN
5.10.5 (a) t máx 2634 psi; (b) t mín 1993 psi;
(c) t prom 2518 psi; (d) V alma 20.19 k
5.10.6 (a) t máx 28.40 MPa; (b) t mín 19.35 MPa;
(c) t prom 25.97 MPa; (d) V alma 58.63 kN
5.10.7 q máx 1270 lb/ft
5.10.8 q máx 123.7 kN/m
5.10.9 S 8 23
5.10.10 V 273 kN
5.10.11 t máx 1.42 ksi, t mín 1.03 ksi
5.10.12 t máx 19.7 MPa
5.10.13 t máx 2221 psi
5.11.1 V máx 676 lb
5.11.2 V máx 1.924 MN
5.11.3 F 1994 lb/in
5.11.4 V máx 10.7 kN
5.11.5 (a) s máx 5.082 in
(b) s máx 3.472 in
5.11.6 (a) s A 78.3 mm; (b) s B 97.9 mm
5.11.7 (a) s máx 2.77 in; (b) s máx 1.85 in
5.11.8 s máx 92 mm
5.11.9 V máx 18.3 k
5.11.10 s máx 235 mm
5.11.11 (a) caso (1)
(b) caso (2)
(c) caso (3)
(d) caso (3)
5.11.12 s máx 180 mm
5.12.1 s t 14,660 psi, s c 14,990 psi
5.12.2 s t 5770 kPa
s c 6668 kPa
5.12.3 t mín 0.477 in
5.12.4 s t 11.83 MPa, s c 12.33 MPa
t mín 12.38 mm
5.12.5 s t 302 psi, s c 314 psi
5.12.6 T máx 108.6 kN
5.12.7 a arctan [(d 2 2 d 2 1)/(4hd 2 )]
5.12.8 (a) d 70 mm (b) d 76.5 mm
5.12.9 H máx 32.2 ft
5.12.10 W 33.3 kN
5.12.11 (a) s t 87.6 psi, s c 99.6 psi;
(b) d máx 28.9 in
5.12.12 (a) b p d/6
(b) b p d/3
(c) Poste rectangular
5.12.13 (a) s t 1900 psi, s c 1100 psi;
(b) Los dos esfuerzos aumentan su magnitud
5.12.14 (a) s t 8P/b 2 , s c 4P/b 2 ;
(b) s t 9.11P/b 2 , s c 6.36P/b 2
5.12.15 (a) s t 856.8 psi, s c 5711 psi
(b) y 0 4.62 in
(c) s t 453 psi, s c 2951 psi, y 0 6.33 in
5.12.16 (a) s t 3.266 MPa, s c 24.226 MPa
(b) y 0 76.241 mm
(c) s t 1.587 MPa, s c 20.33 MPa,
y 0 100.8 mm
5.12.17 (a) s t 15.483 ksi
(b) s t 2.909 ksi
5.12.18 (a) y 0 21.5 mm
(b) P 67.3 kN
(c) y 0 148.294 mm, P 149.6 kN