Solution to Problem 349 | Helical Springs Jhun Vert Tue, 04/21/2020 - 03:00 pm

Problem 349
A rigid bar, hinged at one end, is supported by two identical springs as shown in Fig. P-349. Each spring consists of 20 turns of 10-mm wire having a mean diameter of 150 mm. Compute the maximum shearing stress in the springs, using Eq. (3-9). Neglect the mass of the rigid bar.
 

Bar supported by springs and a hinge

 

Solution to Problem 252 Statically Indeterminate Jhun Vert Mon, 04/20/2020 - 11:25 pm

Problem 252
The light rigid bar ABCD shown in Fig. P-252 is pinned at B and connected to two vertical rods. Assuming that the bar was initially horizontal and the rods stress-free, determine the stress in each rod after the load after the load P = 20 kips is applied.
 

Figure P-252

 

Solution to Problem 251 Statically Indeterminate Jhun Vert Mon, 04/20/2020 - 11:21 pm

Problem 251
The two vertical rods attached to the light rigid bar in Fig. P-251 are identical except for length. Before the load W was attached, the bar was horizontal and the rods were stress-free. Determine the load in each rod if W = 6600 lb.
 

Figure P-251

 

Solution to Problem 242 Statically Indeterminate

Problem 242
The assembly in Fig. P-242 consists of a light rigid bar AB, pinned at O, that is attached to the steel and aluminum rods. In the position shown, bar AB is horizontal and there is a gap, Δ = 5 mm, between the lower end of the steel rod and its pin support at C. Compute the stress in the aluminum rod when the lower end of the steel rod is attached to its support.
 

Figure 242

 

Solution to Problem 214 Axial Deformation Jhun Vert Mon, 04/20/2020 - 08:00 pm

Problem 214
The rigid bars AB and CD shown in Fig. P-214 are supported by pins at A and C and the two rods. Determine the maximum force P that can be applied as shown if its vertical movement is limited to 5 mm. Neglect the weights of all members.
 

Figure P-214

 

Solution to Problem 212 Axial Deformation Jhun Vert Mon, 04/20/2020 - 07:57 pm

Problem 212
The rigid bar ABC shown in Fig. P-212 is hinged at A and supported by a steel rod at B. Determine the largest load P that can be applied at C if the stress in the steel rod is limited to 30 ksi and the vertical movement of end C must not exceed 0.10 in.
 

Figure P-212