. Design of a portable pneumatic riveter. other at right angles thereto. The component along TC causesa pure shear and is given by the equation SB = *L°2!L°! (4) where Sa = the shearing stress. P = pressure exerted on the frame. o< = the angle that the component alongTC makes with the force P-^. A = the area of the component at right angles to TC causes a tension and is givenby the equation ,|.£-&-B (5) where S{ = tensile stress and the other symbols are as before. To determine the resultant maximum stresses in the sectionuse the formulas given in Merrimans Mechanics of Material
. Design of a portable pneumatic riveter. other at right angles thereto. The component along TC causesa pure shear and is given by the equation SB = *L°2!L°! (4) where Sa = the shearing stress. P = pressure exerted on the frame. o< = the angle that the component alongTC makes with the force P-^. A = the area of the component at right angles to TC causes a tension and is givenby the equation ,|.£-&-B (5) where S{ = tensile stress and the other symbols are as before. To determine the resultant maximum stresses in the sectionuse the formulas given in Merrimans Mechanics of Materials,page 225 Max, :. St - SXLLSL Ajsi ?[St-§JSf| » .... (6Max. S0 = sc - si +~y s| +8o_|JB« 8 . . (7) Max. SS A/s^HS7 or si + [s^t] ....... (8) where = maximum tensile stress. Sc = maximum compressive = maximum shearing stress. -11- HORIZONTAL an I section having the general proportions indi-cated in Fig. 2 and calculating the properties of the sectionthe values tabulated in Table I were No Area Mom, Mom. Ct cc leg. h Ah2 I Io n. Tc 1 6 • 8# 475 1 1 2 8 2 204 7 4 3 0 0 501 5 5 36 .85 Substituting the values of Table I in formulas (2) to (9)inclusive the following values were obtained P = 66000 lb. e = in. 0 _ 66000 x _ ,,onn n, / . S+- = = 11800 sq. in. 1 175 * 66000 x / Sc - ^ _ = 14250 sq. in. 145 s, = 66000 = 1?90 lb#/ in#Z Max. S+ = 11800 + 1790 = 13590 sq. in, -TO. Max. S = 14250 + 1790 = 16040 esq. These maximum values are within the limits given in thespecifications and the section therefore can be used. 45 DEGREE dimensions shown in Fig. 3 -ere assumed and the prop-erties of the section were calculated and the results weretabulated in Table II.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1912
