發(fā)布時間：2019-01-16 02:04

【摘要】：將數(shù)字圖像相關(guān)方法用于測量含Ⅰ型裂紋Cr12MoV鋼的斷裂韌性。搭建了數(shù)字圖像相關(guān)方法非接觸光學(xué)測試系統(tǒng),通過進(jìn)行三點彎曲試驗,得到了Cr12MoV鋼試件裂紋尖端的位移場。從位移場提取了裂紋嘴張開位移,并通過P-V曲線得到Ⅰ型裂紋Cr12MoV鋼的斷裂韌性。將實驗結(jié)果與傳統(tǒng)COD引伸計測試結(jié)果進(jìn)行對比,誤差不超過10%,證明該方法是準(zhǔn)確的。
[Abstract]:The digital image correlation method is used to measure the fracture toughness of Cr12MoV steel with mode I cracks. A digital image correlation method non-contact optical measurement system is built. The displacement field at the crack tip of Cr12MoV steel specimen is obtained by three point bending test. The crack opening displacement was extracted from the displacement field and the fracture toughness of mode I cracked Cr12MoV steel was obtained by P-V curve. The experimental results are compared with those of the traditional COD extensometer, and the error is not more than 10. It is proved that the method is accurate.
【作者單位】： 昆明理工大學(xué)建筑工程學(xué)院;昆明理工大學(xué)云南省高校先進(jìn)材料力學(xué)行為與微結(jié)構(gòu)設(shè)計重點實驗室;
【基金】：國家自然科學(xué)基金項目(11362007,11462009)
【分類號】：TG142.12

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