Does the circle of an expanded piece of aluminum grow to be larger in diameter, of does it grow to be smaller? I will agree that the overall mass must surely increase in size.
WE all know the length increases. Those of us who have learned by trial and error have learned we need or like close to .060 for expansion clearances between block, cam and anything the rod gets near. We also have learned that the steel rod will also grow, but not as much. So .040 clearances are pretty much accepted by many of us between steel rods and blocks, cams etc.
Let us let our minds go on a little trip and look at things from different perspectives than usually accepted.
So if you were to cut a hole in an aluminum billet sheet and then heat it, will the hole get larger or will it get smaller? Or can the hole actually stay close to the same size, because of the mass surrounding the material on the perimeter of the hole expanding outward and at the same time pushing around the material of the hole perimeter?
We all know and we all do recogize that all materials do have a different rate of expansion when heated. The question I am posing is in which direction does it grow or expand? Or does it expand in all areas?
So Let us discuss;
Does the hole get larger, or smaller? Or should it stay close to the same, because of the opposing directions of expansion as the material is heated?
Did I open another can of worms