Transcript:
Structural Forces
Five metal objects are displayed. The first object is a solid, tall rectangle labeled Compression. Red arrows appear on the top and bottom of the rectangle to illustrate force being placed from the top down onto the object and up from the bottom of the object. As the force arrows push in toward the rectangle’s center, the rectangle shortens and the middle bulges slightly.
The first object is a solid, tall rectangle labeled Tension. Red arrows appear on the top and bottom of the rectangle to illustrate force being pulled from the top away from the object and down from the bottom away from the object. As the force arrows pull out away from the rectangle’s center, the rectangle lengthens and the middle bows slightly inward.
The third object is composed of two rectangles together as one solid object and labeled Shear. The rectangle on the left is higher than the rectangle on the right side, and they are fused where they overlap in the middle. Red arrows appear on the top and bottom of the rectangle to illustrate force being placed from the top down onto the object and up from the bottom of the object. The topmost arrow is over the higher left rectangle and the bottom arrow is below the lower right rectangle. As the force arrows push in toward the rectangle’s center, the rectangle shortens and bows slightly outward before breaking into two separate rectangles.
The fourth object is a long horizontal rectangle labeled Bending. Three red arrows appear on the top of the rectangle. The centermost arrow points down to illustrate force being placed downward on the middle of the object. The two red arrows flanking it illustrate the direction of force on the top of the object as being toward the center, while a double-ended red arrow on the bottom of the rectangle illustrates the forces on the bottom of the object as being away from the center.
The fifth object is a long, horizontal cylinder labeled Torsion. Two red arrows appear along the length of the object to illustrate the far left side of the cylinder being twisted away from the viewer and the right side of the cylinder being twisted toward the viewer. The middle of the cylinder bows in slightly.