英语翻译As stress increases,some point in the linear relationshi

英语翻译
As stress increases,some point in the linear relationship is finally reached at which the
material begins to yield.This yield point,Y,of the material can be identified in the
figure by the change in slope at the end linear region.Beacause the start of yielding is
usually diffcult to see in a plot of test data,Y is typically defined as the stress at
which a strain offset of 0.2% from the straight line has occurred.The yield point is a
strength characteristic of the material,and it therefore often referred to as the yield
strength(other names include yield stress and elastic limit)