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 從作用方向上來看。薄膜應(yīng)力有張應(yīng)力和壓應(yīng)力之分。若薄膜具有沿膜面膨脹的趨勢則基底對(duì)薄膜產(chǎn)生壓應(yīng)力,如圖1-2-1(a)所示;相反,薄膜沿膜面的收縮趨勢造成張應(yīng)力,如圖1-2-1(b)所示。一般定義張應(yīng)力為正應(yīng)力,壓應(yīng)力為負(fù)應(yīng)力。過 (共 1868 字) [閱讀本文] >>
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 從作用方向上來看。薄膜應(yīng)力有張應(yīng)力和壓應(yīng)力之分。若薄膜具有沿膜面膨脹的趨勢則基底對(duì)薄膜產(chǎn)生壓應(yīng)力,如圖1-2-1(a)所示;相反,薄膜沿膜面的收縮趨勢造成張應(yīng)力,如圖1-2-1(b)所示。一般定義張應(yīng)力為正應(yīng)力,壓應(yīng)力為負(fù)應(yīng)力。過 (共 1868 字) [閱讀本文] >>