2.4 A 10,000-lb wheel load exerting contact pressure of 80 psi is applied on an elastic two-layer system, as shown in Figure P2.4. Layer 1 has elastic modulus 200,000 psi and thickness 8 in. Layer 2 has elastic modulus 10,000 psi. Both layers are incompressible, with Poisson ratio 0.5.Assuming that the loaded area is a single circle, determine the maximum surface deflec- tion, interface deflection, and interface stress. [Answer:0.025 in., 0.024 in, 11 psi] 10,000 lb 80 psi 0 E1-200,000 psi V10.5 8 in. E2-10,000 psi 2-0.5 FIGURE P2.4
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![2.4 A 10,000-lb wheel load exerting contact pressure of 80 psi is applied on an elastic two-layer system, as shown in Figure P2.4. Layer 1 has elastic modulus 200,000 psi and thickness 8 in. Layer 2 has elastic modulus 10,000 psi. Both layers are incompressible, with Poisson ratio 0.5.Assuming that the loaded area is a single circle, determine the maximum surface deflec- tion, interface deflection, and interface stress. [Answer:0.025 in., 0.024 in, 11 psi] 10,000 lb 80 psi 0 E1-200,000 psi V10.5 8 in. E2-10,000 psi 2-0.5 FIGURE P2.4](https://numengineering.com/wp-content/uploads/2025/04/media_cd9_cd950811-6f70-4180-a9f3-2d22a790311c_phprToYsJ-png.avif)
2.4 A 10,000-lb wheel load exerting contact pressure of 80 psi is applied on an elastic two-layer system, as shown in Figure P2.4. Layer 1 has elastic modulus 200,000 psi and thickness 8 in. Layer 2 has elastic modulus 10,000 ...
![The per capita water demand of a small town having population census records indicated in Table 1, is given by 9 = 150 – 99.6 9.0 where, q = per capita demand [1/c/d] t is time in years starting from 1985. Table 1 Population census records Year 1985 1995 2005 Population 5000 7500 9480 Moreover, from historical water usage data the peaking factors for maximum day and peak hour water demands are estimated to be 175% and 250% of the average day demand, respectively. Determine a The design capacity of a treatment plant if it is to serve the town until the end of 2020. b. The design capacity of the distribution main Use the decreasing rate of increase method for population forecasting and assume a fire demand of 3 m/min.](https://numengineering.com/wp-content/uploads/2025/03/image-1.avif)
