首页|在高应变率拉伸/压缩-扭转载荷下TC17钛合金的屈服和塑性流动行为

在高应变率拉伸/压缩-扭转载荷下TC17钛合金的屈服和塑性流动行为

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金属材料经常暴露在高应变率和复杂的应力条件下。研究这些材料的动态力学行为对工程设计和工业应用至关重要。本文研究了TC17钛合金在压缩/拉伸-扭转作用下的动态塑性流动行为。研究了TC17钛合金在准静态和动态载荷下的初始屈服行为，并采用杨、郭和李提出的动态不对称屈服准则(DAYC)来表征动态初始屈服行为。根据不同应力状态下的硬化特性，提出了一种修正的动态硬化规律(MDHL)来拟合加载面。研究了TC17钛合金在准静态和动态载荷作用下的塑性流动方向。结果表明，塑性势函数基本符合相关联流动法则。总之，本文系统性的研究了TC17钛合金的屈服性能，应变硬化规律和塑性流动规律，并利用DAYC和MDHL对其进行了表征。
The yielding and plastic flow behavior of TC17 alloy under tension/compression-torsion loading at high strain rates
Metallic materials are frequently exposed to high strain rates and complex stress conditions.Research on dynamic mechanical behaviors of these materials is essential for engineering design and industrial applications.In this paper,the dynamic plastic and flow behaviors of TC17 alloy under compression/tension-torsion were studied.The initial yield behaviors of TC17 alloy under quasi-static and dynamic loadings were researched,and a dynamic asymmetric yield criterion(DAYC)proposed by Yang,Guo,and Li was used to characterize the initial yield behavior.According to the hardening properties under different stress states,a modified dynamic hardening law(MDHL)was proposed to fit the loading surface.The plastic flow directions under quasi-static and dynamic loadings of TC17 alloy were investigated.Results showed that the plastic potential function may conform with the associated flow rule(AFR).The yield properties,strain hardening law,and plastic flow rule of TC17 alloy were systematically investigated and successfully characterized by DAYC and MDHL.

Compression/tension-torsionStrain rate effectYield surfaceStrain hardening lawPlastic flow rule

杨学、赵敬凡、杜冰、郭亚洲、李玉龙

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School of Aeronautics,Northwestern Polytechnical University(NPU),Xi'an 710072,China

Yangtze River Delta Research Institute of NPU,Taicang 215400,China

Shaanxi Key Laboratory of Impact Dynamics and Engineering Application(IDEA),Northwestern Polytechnical University,Xi'an 710072,China

Compression/tension-torsion Strain rate effect Yield surface Strain hardening law Plastic flow rule

National Science and Technology Major ProjectNational Natural Science Foundation of ChinaNational Natural Science Foundation of China111 Project

J2019-Ⅷ-0008-01691192221111832015BP0719007

2024

10.1007/s10409-023-23420-x

力学学报(英文版)

力学学报(英文版)

CSTPCD
影响因子：0.363
ISSN：0567-7718
年,卷(期)：2024.40(4)