A proper way to drive a screw using a screwdriver into a workplece is to hold the workpiece In a vise In your strongest hand On your lap With a pliers
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Texts: A proper way to drive a screw using a screwdriver into a workpiece is to hold the workpiece In a vise In your strongest hand On your lap With a pliers Show more…
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Example 3 Figure 7.33 illustrates a fixation device consisting of a plate and two screws, which can be used to stabilize fractured bones. During a single leg stance, a person can apply his/her entire weight to the ground via a single foot. In such situations, the total weight of the person is applied back on the person through the same foot, which has a compressive effect on the leg, its bones, and joints. In the case of a patient with a fractured leg bone (in this case, the femur), this force is transferred from below to above (distal to proximal) the fracture through the screws of the fixation device. If the diameter of the screws is D = 5 mm and the weight of the patient is W = 700 N, determine the shear stress exerted on the screws of a two-screw fixation device during a single leg stance on the leg with a fractured bone.
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