On the Stress due to Nipps at the Center of Leaves of the Laminated Springs

Abstract

There are two kinds of method to caluculate stress of leaves of the laminated springs. The one assumes that each leaf is centilever, and the other assumes that all leaves are laminated with equal curvature. And it was known by experiments that stress due to load may be calculated by the former and that stress due to nipps by the latter in good accuracy. But at the center of leaves, because the leaves are tightly bound each other by means of center bolts or bands, the curvature of the all leaves may be equal, even if there are no load. Author introduced equation to find stress due to nipps of the laminated springs by the former method, and found that this equation coincide with experimental results better than by the latter method. And besides, with this method, introduced the equation for practical design to find curvature of each leaf with simplified stress caluculation.