Two pieces of wood are glued together, find the maximum load which the glued wood could carry that must not exceed 12 MPa normal stress and 7 MPa shear stress. P 30° P 100 mm Glued Section 100 mm
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- Question 2A composite bar is made up of a steel strip 2 mm thick and 12 mm wide, sandwichedbetween two aluminium strips each 3 mm thick and 12 mm wide. The three strips areheld together by two rivets of 5 mm diameter each.2.1 Make a neat detailed sketch of the assembly.2.2 If the three strips are fastened together at 15 0C, determine the shear stress set up inthe rivets when the temperature is raised to 21 0C.Note: The resistance of a rivet in double shear may be taken as 1.75 times the resistancein single shear.(For steel: E = 200 GPa and α = 11×10 -6/ 0C)(For aluminium: E = 70 GPa and α = 22×10-6/0C)A pair of wood components having a dimension of 100mm X 100mm is joined by means of glue as shown. Determine the maximum axial load F, that most nearly can be subject to the woodpost without exceeding a maximum shear stress of 1650 KPa parallel to the cross section in kN.The two pieces of wood, 2 in. by 4 in., are glued together along the 40o joint. Determine the maximum safe axial load P that can be applied if the shear stress in the glue is limited to 250 psi
- The working stresses for the manufactured wood beam are 10 MPa in bending and 1.4 MPa in shear. Determine the largest allowable value of the load intensity wo. 25 mm Wo 25 mm - 250 mm 25 mm 3 m 6 m - 200 mmThe grains of wood in the board make an angle of 20° with the horizontal as shown. The board is subjected to an axial load of P = 300 N. (Figure 1) Part A Determine the normal stress that acts perpendicular to the grains. Express your answer to three significant figures and include the appropriate units. µA Value Units Submit Request Answer Figure < 1 of 1 Part B Determine the shear stress that acts parallel to the grains. Express your answer to three significant figures and include the appropriate units. HA -300 mm 160 mm Ta'y = Value Units 20° 25 mm1 Submit Request AnswerGIVEN: Steel / wood composite beam with cross-section shown Мnaк1.5 х 10° in-lb Esteel = 30 x 106 psi Ewood - 3 x 10° psi 11.5" '/4" REQ'D: A) Sketch transformed cross-section above. B) Calculate the transformed moment of inertia C) Maximum bending stress in the wood D) Maximum bending stress in the steel
- The wood has an allowable normal stress of Oallow = 15 MPa and an allowable shear stress of Tallow = 1.33 MPa. (Figure 1) Part A Determine the minimum dimension h of the beam's cross section to safely support the load. Express your answer to three significant figures and include the appropriate units. µA ? h = Value Units Submit Request Answer Figure Provide Feedback 25 kN/m B 2 m 100 mmDetermine the maximum axial load P (in kN) that can be applied to the wood compression block shown if specifications require that the compressive stress perpendicular to the grain not exceed 12.18 MPa. Note: Do NOT include units in your answer Direction 60° of grain Answer: 100 mm Width P 100 mm Length = 320 mm Depth = 120 mmQuestion 4 A 6 KN force is applied at the free end of a wood (E = 12GPa) beam with dimensions given in Fig. Q4. Neglecting the effect of fillets and stress concentration, determine (a) the maximum compressive stress and its location at section A-A; (b) the maximum shearing stress and its location at section A-A; (c) the deflection at section A-A. 6 kN 300 mm 400 mm ΤΑ 叶 ¡A Fig. Q4 96 mm -- 12 mm 12 mm 48 mm
- The grains of wood in the board make an angle of 20° with the horizontal as shown. The board is subjected to an axial load of P = 250 N . (Figure 1) Part A Determine the normal stress that acts perpendicular to the grains. Express your answer to three significant figures and include the appropriate units. µA Value Units Figure 1 of 1 Submit Request Answer Part B 300 mm Determine the shear stress that acts parallel to the grains. 60 mm Express your answer to three significant figures and include the appropriate units. 20° 25 mm HẢ ? Value Units P Pearson4. The two pieces of wood, 2 in. by 4 in., are glued together along the 40° joint shown in Figure 4. Determine the maximum axial load P that can be applied if the shear stress in the glue is limited to 250 psi. 600 N 30 150mm FIGURE 4 100 mm 600 N– A joint is made by gluing two plywood gussets of thickness t to wood boards.The tensile working stresses are 1200 psi for the plywood and 700 psi for the woodboards. The working shear stress of the glue is 50 psi. Determine the dimensions’ b and tso that the joint is as strong as the boards.