單項(xiàng)選擇題對(duì)于沒(méi)有明顯屈服階段的塑性材料.通常以s0.2表示屈服極限。其定義有以下四個(gè)結(jié)論.正確的是哪一個(gè)?()

A.產(chǎn)生2%的塑性應(yīng)變所對(duì)應(yīng)的應(yīng)力值作為屈服極限;
B.產(chǎn)生0.02%的塑性應(yīng)變所對(duì)應(yīng)的應(yīng)力值作為屈服極限;
C.產(chǎn)生0.2%的塑性應(yīng)變所對(duì)應(yīng)的應(yīng)力值作為屈服極限;
D.產(chǎn)生0.2%的應(yīng)變所對(duì)應(yīng)的應(yīng)力值作為屈服極限。


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