测井技术2025，Vol.49Issue(5)：714-720,7.DOI:10.16489/j.issn.1004-1338.2025.05.007
井下仪器外壳螺纹环常用铝青铜材料本构模型
Constitutive Relation of Aluminum Bronze Material Commonly Used for the Threaded Ring of Downhole Tool Housing
摘要
Abstract
In order to optimize the service performance and reliability of the threaded ring of petroleum logging tool under complex temperature conditions,this study focuses on QAL10-4-4 aluminum bronze and adopts a combination of experimental and modeling methods.By designing a thermal simulation tensile experiment covering multiple temperature ranges of 25～260℃,the true stress-strain curve of the material is obtained,revealing its mechanical response law with temperature evolution:significant work hardening effect is observed in the low temperature zone(such as around 25℃),while the medium high temperature zone(above 150℃)showed characteristics of plastic enhancement and reduced hardening rate.Based on this,a Johnson-Cook(JC)constitutive model is constructed,and the key parameters are accurately fitted using the least squares method to achieve quantitative description of yield stress.The research results indicate that the established model can accurately characterize the mechanical behavior evolution of materials in multiple temperature ranges,and the prediction error of yield stress is strictly controlled within 5%,successfully achieving effective prediction of stress-strain relationships in multiple temperature ranges.This model can be directly applied to the accurate calculation of pretightening force in threaded ring assembly and finite element simulation of downhole variable temperature cycling conditions,providing theoretical basis for tooth profile optimization design,wall thickness parameter determination,and service failure warning.This study forms a closed-loop research paradigm of"multi condition experiment-constitutive modeling-engineering application":providing key mechanical data and modeling experience for the application of QAL10-4-4 aluminum bronze in petroleum logging threaded rings,significantly expanding the applicability of the JC model in simulating the mechanical behavior of high-performance alloys in extreme environments.The research results not only provide quantitative tools for solving the optimization problem of threaded ring engineering,but also establish methodological references for the reliability design of similar high-performance alloys in key connectors of downhole tools.关键词
QAL10-4-4铝青铜/Johnson-Cook本构模型/拉伸试验/井下仪器/螺纹环Key words
QAL10-4-4 aluminum bronze/Johnson-Cook constitutive model/tensile testing/downhole tool/threaded ring引用本文复制引用
王水航,王贯宇,李靖祥,侯学理,王敬祥,周毓堂,范淑琴..井下仪器外壳螺纹环常用铝青铜材料本构模型[J].测井技术,2025,49(5):714-720,7.基金项目
国家科技重大专项课题"超高温高压快速与成像测井装备"(2025ZD1402101) （2025ZD1402101）
陕西省自然科学基金面上项目"高强度建筑钢筋连接端头螺纹的剥肋三滚轮滚压成形机理及伺服新装备研究"(2023-JC-YB-353) （2023-JC-YB-353）
中国石油天然气集团有限公司攻关性应用性专项项目"175℃@60h全系列成像测井关键技术攻关和装备研制"(2023ZZ26) （2023ZZ26）
