Q690E/Q960E高强钢延性损伤模型参数研究  

The key parameters of ductile damage model calibration for Q690E/Q960E High-Strength Steel

作　　者：张彪 ZHANG Biao(China Railway SIYUAN Survey and Design Group Co.,Ltd,Wuhan 430063)

机构地区：[1]中铁第四勘察设计院集团有限公司建筑院,武汉430063

出　　处：《铁道勘测与设计》2025年第2期48-52,共5页Railway Survey and Design

摘　　要：基于Q690E/Q960E两种高强钢单轴拉伸试验结果对高强钢材料延性损伤本构关系的关键参数进行标定,并使用数值分析方法进行了验证,旨在为高强钢材断裂的数值分析提供有效手段。高强钢材料延性损伤模型包括三个部分:真实应力-应变关系、损伤起始准则和损伤演化。首先,通过数值分析与高强钢单轴拉伸试验结果对比,确定了真实应力-应变关系曲线。然后,基于校正后完整的应力-应变曲线,标定了高强钢材料延性损伤模型中损伤起始和损伤演化的关键参数。最后利用数值分析方法验证该延性损伤模型在预测高强钢断裂行为的可行性。This paper calibrates the key parameters of the ductile damage model for high-strength steel materials based on the uniaxial tensile test results of Q690E/Q960E steels,and validates the calibrated model by numerical analysis.The aim is to provide an effective approach for numerical analysis of fracture in high-strength steels.The ductility damage model for high-strength steel materials consists of three parts:true stress-strain relationship,damage initiation criterion,and damage evolution.Firstly,the true stress-strain curve is determined by comparing numerical analysis results with uniaxial tensile test results.Then,based on the corrected complete stress-strain curve,the key parameters for damage initiation and evolution in the ductility damage model of high-strength steel materials are calibrated.Finally,the feasibility of this damage model in predicting the fracture behavior of high-strength steel is verified using numerical analysis methods.

关 键 词：Q690高强钢 Q960E高强钢 延性损伤 真实应力-应变关系 断裂模拟 

分 类 号：TU3[建筑科学—结构工程]