建立了分析水杨酸、5-氯代水杨酸、三氯水杨酸等水杨酸类化合物的毛细管区带电泳法 ( CZE)。讨论了电压、缓冲溶液的浓度和 p H值对分析结果的影响。其中缓冲溶液的 p H值对分析结果的影响最为显著。 p H<7.40时 ,三种化合物的出峰...建立了分析水杨酸、5-氯代水杨酸、三氯水杨酸等水杨酸类化合物的毛细管区带电泳法 ( CZE)。讨论了电压、缓冲溶液的浓度和 p H值对分析结果的影响。其中缓冲溶液的 p H值对分析结果的影响最为显著。 p H<7.40时 ,三种化合物的出峰顺序为 :三氯水杨酸、5-氯代水杨酸、水杨酸 ;当 p H>7.40时 ,三种化合物的出峰顺序为 :5-氯代水杨酸、水杨酸、三氯水杨酸。水杨酸、5-氯代水杨酸、三氯水杨酸的检出限分别为 0 .1、0 .2和 0 .1μg/m L。展开更多
An idealized tri-material assumption is established to describe the constitutive relationship of mismatched welded joints by considering the influence of heat affected zone(HAZ).The fracture parameters Jand C*are e...An idealized tri-material assumption is established to describe the constitutive relationship of mismatched welded joints by considering the influence of heat affected zone(HAZ).The fracture parameters Jand C*are estimated for mismatched welded joints with HAZ cracks by finite element analysis with ABAQUS.A middle crack tension(M(T))specimen is utilized in the analysis for different material properties and geometries of the weldment.The influence of mechanical property and geometry on the fracture parameters Jand C*of the specimen is discussed for the welded joints with HAZ crack.The results suggest that the HAZ property is a significant factor in the estimation of Jand C*for the mismatched welded joint with HAZ crack.展开更多
基金Sponsored by National High Technology Research and Development Program of China(2012AA040106)
文摘An idealized tri-material assumption is established to describe the constitutive relationship of mismatched welded joints by considering the influence of heat affected zone(HAZ).The fracture parameters Jand C*are estimated for mismatched welded joints with HAZ cracks by finite element analysis with ABAQUS.A middle crack tension(M(T))specimen is utilized in the analysis for different material properties and geometries of the weldment.The influence of mechanical property and geometry on the fracture parameters Jand C*of the specimen is discussed for the welded joints with HAZ crack.The results suggest that the HAZ property is a significant factor in the estimation of Jand C*for the mismatched welded joint with HAZ crack.