Structural Support and Materials

Match each mechanical action or scenario to the primary type of internal stress it induces on the object or material.

A vertical column in a building framework is primarily designed to resist tensile forces that attempt to stretch it.

Match the following structural joint configurations to their defining characteristics and typical load behaviors.

Match each material property to its correct mechanical definition.

A heavy steel block is being lifted vertically by a crane using a single wire cable. As the block hangs from the cable, what type of internal stress is primarily acting on the cable?

A simple wall-mounted jib crane is used to lift a heavy engine block. The crane consists of a rigid horizontal beam attached to a vertical wall at one end, and a diagonal support cable connecting the outer end of the beam to a point higher up on the wall. The engine block hangs directly from the outer end of the horizontal beam. Based on this configuration, which of the following correctly identifies the primary type of stress experienced by the diagonal cable and the horizontal beam?

A building's concrete foundation pillars, which support the heavy weight of the entire structure above them, are primarily subjected to tension stress.

When a simply supported horizontal beam bends downward due to a heavy load applied at its center, the top surface of the beam experiences tensile stress, while the bottom surface experiences compressive stress.

A solid drive shaft transmits rotational power to a heavy gear. To lock them together and prevent the gear from slipping, a rectangular steel key is fitted into a shared horizontal slot between the shaft and the gear's inner hub. When the motor engages and the shaft forcefully rotates while the heavy gear resists, the shaft pushes against one side of the key's bottom half, while the gear's hub pushes back against the opposite side of the key's top half. What primary type of mechanical stress does the steel key experience in this scenario?

Two overlapping steel plates are fastened together by a single rivet. If opposing lateral forces pull the two plates in opposite directions away from each other, what type of internal stress is primarily experienced by the rivet?

Match each type of mechanical stress to the description of the forces that cause it.

A heavy shipping container is suspended steadily in the air by a single vertical steel cable attached to a helicopter. Which of the following types of stress is the steel cable primarily experiencing?

Match each structural scenario or mechanical component to the primary type of internal stress it experiences under load.

Compressive stress is the internal force that occurs when a structural component is pulled apart or stretched from both ends.

In structural mechanics, strain is defined as the internal force per unit area that a material exerts to resist an applied load, whereas stress is the physical deformation or change in dimensions resulting from that applied force.

A stationary jib crane consists of a horizontal metal boom attached to a vertical mast. The outer end of the boom is supported by a diagonal steel cable connected higher up on the mast. When a heavy load is suspended from the outer end of the boom, what types of internal stress are primarily experienced by the diagonal cable and the horizontal boom, respectively?

Match each basic structural component with its primary function and the main type of internal force it is designed to resist.

A marine vessel is cruising forward at a constant speed. Its propulsion system uses an internal engine to drive a solid steel shaft, which extends out the rear of the hull to turn the propeller. A heavy-duty thrust bearing inside the ship absorbs the forward driving force generated by the propeller. During this forward motion, what primary combination of internal stresses is the section of the shaft located between the propeller and the thrust bearing experiencing?

A rigid horizontal strut extends outward from a vertical building wall to support a heavy sign. The outer end of the strut is supported by a diagonal steel cable anchored to the wall above. The inner end of the strut is connected to a wall bracket using a heavy-duty steel pin. When the sign's weight is applied to the outer end of the strut, what primary types of internal mechanical stress are experienced by the diagonal cable, the horizontal strut, and the steel pin, respectively?

A worker stands on the top platform of an open A-frame stepladder resting on a smooth floor. The ladder has a horizontal folding metal spreader bar that connects the front and rear legs to keep the ladder from collapsing flat. What primary type of internal stress is experienced by the horizontal spreader bar while supporting the worker's weight?