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- find the tensile of the bolt with diameter 38mm,80kNWhat is the design stress in psi of an ASTM A313, gage number 8 spring wire. The type of application requires a factor of 0.34 for the type of service. Round your answer to 4 significant figures.A mild steel rod is subjected to a design stress of 382.16 N/mm2. If the maximum allowable stress is 500 MPa, calculate the factor of safety? a. 1.6 O b. 2 C. 1.3 O d. 1.5
- 0 4in Two ceramic balls are in contact, as shown. The top one is titanium nitride, for which E 15 Msi, and the one on the bottom is aluminum oxide, for which E = 54 Msi. With how much force must they be loaded before a, = 20 ksi? 10 im A. 9.5 lb B. 8.5 lb C. 6.5 lb D. 5.0 lb E. None of the above-Which of the following statement/s is NOT true?Strain is dimensionlessThe cross-sectional area affected by the rivets in a plate is πdtStrain is the total deformation of the body divided by its original length.Shear stress is directed parallel to the area upon which it acts. -Which statement is NOT true about ksi? *Kilo (psi).1000 lb1 x10^3 psi.1 x10^3 lb. -Tensile stresses and strain are considered:negative tensile stress and positive lengthnegative increase in lengthpositive increase in lengthpositive tensile stress and negative lengthA Brinell hardness measurement of 650 HBN, using a 10-mm-diameter indenter and a 2850 kg load on an aluminum plate. Determine the indentation diameter. O a. 2.346 mm O b. 2.366 mm O c. 2.344 mm O d. 2.364 mm
- 1. A steel hanger is bolted to a steel frame using two 5/8 in-18 UNF grade 7 bolts. The thickness of the hanger at the bolt is identical to that of the frame, 1 inch each. A vertical load varying between 0 and 40,000 lb is applied at the hanger. The bolts are initially tightened to 75% of its full proof load. The length of the bolt is two threads beyond the nut. Determine the factors of safety against yielding, overloading and joint separation, respectively. Also, estimate the torque required to develop the preload. F For Problem 1, it is suspected that the fatigue life of the bolts is finite. After the aforementioned fluctuating load has been applied for 200,000 cycles, one decides to lower the load so that the bolts can have an infinite fatigue life. Suppose the stiffness constant of the joint has been adjusted to 0.2 (i.e., C= 0.2). Estimate the new endurance limit of the bolts after 200,000 cycles of the fluctuating load applied, using the Minor rule and based on the Goodman…Question 9 1 Point A mild steel tie bar is to withstand a maximum tensile force of 100 kN. The ultimate tensile stress is 540 x 10 N/m2 and the factor of safety is to be 3. If the Young's of the steel is 210 kN/mm2, calculate the diameter of the bar. 27.5 mm B 25.6 mm 26.6 mm D 28.5 mm 1 PointDATE: A 01. The member consists of the steel rod AB that is screwed into the end of the bronze rod BC. Find the largest value of P that meets the following design criteria: (a) the overall length of the member is not to change by more than 3 mm; and (b) the stresses are not to exceed 140 MPa in steel and 120 MPa in bronze. The moduli of elasticity Steel A = 480 mm2 1.0 m |B 3P Bronze are 200 GPa for steel and 80 GPa for bronze. 2 m A = 650 mm? 2P
- Two steel plates grade 300 having the same dimensions (250mm width x 25mm depth) are joint using grade 8.8 bolts with an axis K-J as shown in Figure B2 The details of suitable bolts are provided in Table B2. A force of 950 kN needs to be transferred through these plates at the connection. The shear strength of the bolt is provided as 0.6 x 830MPA. If only 24mm bolts are available, calculate the number of bolts required to sufficiently transfer the force in this connection. LATERAL CONTACT Figure B2-Determine the safe tensile load for bolts of M20 and M42 . Assume that the bolts are not initially stressed and take the safe tensile stręss as 2000 kg/cm" . 2- An eye bolt carries a tensile load of 2000 kg. Find the size of the bolt, if the tensile stress is not to exceed 1000 kg/cm. Also draw a neat proportioned figure for the bolt oris the working stress, if the allowable stress in the material is 40 MPa and FOS is 3.5. O a. 1142.8 N/m² b. 114.28 N/mm2 O c. 1.1428 kN/cm² O d. 11.428 N/cm²