4. The two pieces of wood, 2 in. by 4 in., are glued together along the 40º 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.
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- The wooden members A and B are to be joined by plywood splice plates that will be fully glued on the surfaces in contact. The clearance between the ends of the members is to be 11 mm, the length of the plywood is L = 288 mm and the width of the wood is W = 119 mm. Find the shearing stress (in Mpa) in the glue if P = 35.9 kN. Round off the final answer to two decimal places.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 mmThe 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
- 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)Two pieces of wood, 60 mm by 120 mm each are glued together along the 40° joint. The permissible normal stress in the glue is limited to 100 MPa. The maximum safe load that can be applied at the joint is P+ 40° 60 mm P– 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.
- Assuming the concrete is uncracked, compute the flexure stresses in the extreme fibers of the beam as shown in the figure for a bending moment of 34 kN-m. The concrete has an f' of 27.60 MPa; determine also the cracking moment of the section. (Use 0.62 1 = 0.70 in calculating the modulus of rupture). Dimensions are in millimeter. 380 455 3 #9 bars (A, = 3.00 in.2) 75 300Question. Two plates each of 50 mm x 500 mm section are glued together along the length to form a section 50 mm x 1000 mm, used as a beam. If the shear force at a section is 1000 N. What is the maximum shear stress on the glue?Fotoğraflar - Ekran Görüntüsü (10)_LI.jpg Tüm fotoğrafları görüntüle + Şuraya ekle: Z Düzenle ve Oluştur v E Paylaş The stress-strain diagram of a reinforcement steel having a cross-sectional diameter of 12 mm diameter and 100 mm gage length is determined after its tensile strength test as follows. Based on the stress- strain diagram determine the followings properties of the material (Poisson's ratio of the material is 0.32) : 600 a) Modulus of elasticity 550 500 b) Yield strength 450 c) Toughness 400 350 d) Resilience 300 e) Shear modulus 250 200 f) Bulk modulus 150 g) Ductility as described by 100 percent change in length 50 0.01 0.02 O.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18 Strain 18:12 18.01.2021 10 Stress, MPa
- Two wood boards, each 16 mm thick, are joined by the glued finger joint shown. The finger joint will fail when the average shear stress in the glue reaches 760 kPa. Determine the shortest allowable length d of the cuts if the joint is to withstand an axial load of P = 7.0 kN. Use a = 18 mm and b = 144 mm. d Glue a P P a Answer: d= i b mmTwo wooden boards are joined by cutting and gluing them together along the plane shownin the illustration. The boards have cross-sectional dimensions of 3.5” by ¾” and are subjectedto an axial tension, P, of 1870 lb.a) Determine the normal and shear stresses acting on the glued joint if = 20o.b) For what joint angle, , will the shear stress on the glued joint be equal (in magnitude) totwice the normal stress on the joint?A steel bar is attached to a wood support beam with four 22 mm diameter lag screws, as shown in the figure. The steel bar is 69-mm-wide by 8-mm-thick. For the steel bar, the yield strength is 235 MPa and the ultimate bearing strength is 350 MPa. The ultimate shear strength of the lag screws is 155 MPa. Factors of safety of 1.70 with respect to yield strength and 3.0 with respect to bearing strength are required for the bar. A factor of safety of 2.9 with respect to the ultimate shear strength is required for the lag screws. Determine the allowable load P that can be supported by this connection. (Note: Consider only the gross cross-sectional area of the bar-not the net area.) Support beam Answer: Pallow= 0000 P Steel bar KN