主管道材料微试样液压鼓胀拘束度影响研究  

STUDY ON THE INFLUENCE OF HYDRAULIC BULGING RESTRAINT INTENSITY ON MICROSAMPLE OF MAIN PIPELINE MATERIAL

作　　者：王春辉[1] 安英辉 WANG ChunHui;AN YingHui(Daya Bay Nuclear Power Operations and Management Co.,Ltd.,Shenzhen 518000,China)

机构地区：[1]大亚湾核电运营管理有限责任公司,深圳518000

出　　处：《机械强度》2024年第5期1090-1094,共5页Journal of Mechanical Strength

摘　　要：以原始态主管道材料的3种微试样厚度(0.4 mm、0.5 mm和0.6 mm)以及3种倒角半径(0.5 mm、0.8 mm和1.0 mm)为研究对象,进行液压鼓胀试验拘束度影响分析,构建屈服强度、抗拉强度以及液压鼓胀延伸率关联模型,研究屈服强度和抗拉强度的拟合误差以及液压鼓胀延伸率分散性。结果表明,随着微试样厚度的逐步增加,峰值载荷明显增加,而峰值位移普遍降低,但整体曲线趋势变化较小;随着微试样倒角半径的逐步减小,峰值位移明显降低;微试样厚度0.5 mm和倒角半径1.0 mm的试样测试稳定性最佳。Three kinds of micro-sample thicknesses(0.4 mm,0.5 mm and 0.6 mm)and three kinds of chamfer radii(0.5 mm,0.8 mm and 1.0 mm)of the original main pipe material were taken as the research objects to analyze the influence of restraint intensity in hydraulic bulging test,and to build a correlation model of yield strength,tensile strength and hydraulic bulging elongation.The fitting error of yield strength and tensile strength and the dispersion of hydraulic bulging elongation were studied.The results show that with the gradual increase of microspecimen thickness,the peak load increases obviously,while the peak displacement generally decreases,but the overall curve trend changes little.With the gradual decrease of the microsample chamfer radius,the peak displacement decreases obviously.The test stability is best under the test conditions of microsample thickness 0.5 mm and chamfer radius 1.0 mm.

关 键 词：液压鼓胀 拘束度 屈服强度 抗拉强度 倒角半径 

分 类 号：TB302[一般工业技术—材料科学与工程]