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Coupling phase field with creep damage to study γ’ evolution and creep deformation of single crystal superalloysMin Yang1,Jun Zhang1,Weimin Gui2,Songsong Hu1,Zhuoran Li1,Min Guo1,Haijun Su1,Lin Liu11... with elastoplastic de fo rmation and creep damage has been built to study the micro structural evolution and deformation behavior for Ni-Al single crystal alloy during the whole creep processing.The......
为 (4) 图6所示为不同对应的非线性黏弹性体蠕变曲线.由图6可知:越大,岩石由衰减蠕变进入等速蠕变所需的时间越短,衰减蠕变阶段蠕变斜率衰减的速度越快,说明该模型能够反映不同蠕变时间和不同应力状态下岩石衰减蠕变曲线特征,适用性较传统Kelvin模型更广泛. 图6 不同λ岩石蠕变曲线 Fig. 6 Creep curves of rock at different λ 假设在时刻卸载,式(3)可表...,分别描述岩石瞬时弹性应变,瞬时塑性应变,非线性黏弹性应变和黏塑性应变.根据叠加原理,将上述4个模型串联,建立可以同时描述加载过程中的上述4种应变,完全卸载时瞬时恢复的瞬时弹性应变和随时间逐渐恢复的黏弹性应变的复合蠕变模型,该复合蠕变力学模型如图8所示. 图8 复合蠕变模型 Fig. 8 Model of composite creep 当时,岩石总应变由瞬时弹性应变,瞬时塑性应变和非线性黏弹性......
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: A Primary creep of single crystal superalloys at intermediate temperature -An important factor of turbine blade extension ZHENG Yun-rong, YANG Su-ling, RUAN Zhong-ci (Beijing Institute... to date is that the extent of primary creep at intermediate temperature is much higher than that at high temperature. Moreover, compared with high temperature creep, the primary creep strain......
)02-0506-06 Analysis of reinforcement influence on concrete creep CAO Guohui1, YANG Liang2, ZHANG Kai1, PENG Xirong1 (1. College of Civil Engineering, Hunan City University, Yiyang 413000, China; 2. College... correction coefficient was introduced to predict the creep of reinforced concrete and deduce the corresponding calculation formula. The validity and practicability of the reinforced correction coefficient were......
松弛行为；短时蠕变；本构方程 中图分类号:TG146.2 文献标志码:A Short-term creep constitutive relation and stress..., the relationship between short-term creep strain rate and stress was deduced. Then, the short-term creep constitutive equation of Ti6Al4V alloy at high temperature was obtained by fitting the creep......
Cyclic Creep Deformation and Fracture of a Cr-Mo Rotor Steel at Elevated Temperatures朱世杰,阳志安,王中光摘 要:<正> Static creep and cyclic creep tests were carriedout on a Cr-Mo rotor steel from 0.5 to 0.6 Tm.Cyclic creep retardation occurred under the testconditions.With an increase of stress frequency,cyclic creep strain rate decreases and rupture......
Creep mechanism of as-cast Mg-6Al-6Nd alloyWU Yufenga,b,DU Wenbob,ZHANG Yinanb,and WANG Zhaohuib a Institute of Recycling Economy,Beijing University of Technology,Beijing 100124,China b College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China摘 要:The creep mechanism of as-cast Mg-6Al-6Nd alloy was studied.The......
变率较纯Mo单晶的降低了3~4个数量级,分析认为其蠕变机制为扩散蠕变. 关键词:Mo-Nb合金单晶; 固溶强化; 高温强度; 高温稳态蠕变速率; Mo-Nb alloy single crystal; solid-solution strengthening; high temperature strength; high temperature creep rate; [全文内容正在添加中] ......
property; shear strength; creep rupture life; [全文内容正在添加中] ......
