Research on constitutive model of elastic creep damage of heat resistant steel under the condition of high temperature and high pressure 高溫高壓用耐熱鋼彈性蠕變損傷本構模型研究
Based on the relocating mesh model , according to heat conduction theory , elastic creep theory and finite element theory , simulation program for roller compacted concrete overflow dam is worked out through 3 - d finite element method 基于本文提出的計算模型,根據熱傳導理論、彈性徐變理論及有限元理論,作者編制了碾壓混凝土溢流壩溫度場及溫度應力場的三維有限元仿真計算程序。
According to the theory of equivalent time , creep as a function of equivalent time is expressed . by fitting experimental data , parameters of creep in equivalent time field are obtained ; initial strain implicit solution of elastic creep equation in equivalent time field is derived 根據等效時間理論,將徐變表示為等效時間的函數,通過擬合試驗數據,得出等效時間域彈性模量和徐變度公式的計算參數,推導了等效時間域的彈性徐變方程的初應變隱式解法。
In the light of the fact that elastic creep damage happens to heat resistant steel used as pressure elements like steam pipeline and steam pockets in heat - engine plants at high temperature and under high pressure , this article gives a complete constitutive description of the damage , building up the theory of phenomenology about creep damage 摘要針對火電廠中蒸汽管道與汽包類承壓部件用的耐熱鋼,在承受高溫高壓時發生彈性蠕變損傷問題,給出完整的損傷本構描述,建立起唯象學蠕變損傷理論。
Element constitutive model is adopted to testify the necessity of non - stationary parameters . one - dimensional non - stationary visco - elastic creep equation of rock is given . according to data contrast of theory and experiment , non - stationary visco - elastic constitutive model more accurately reflects the deformation capability of rock than the constant one 建立了一維情況下,非定常粘彈性模型的蠕變方程,通過理論計算結果與試驗結果的對比,發現非定常粘彈性模型比定常粘彈性模型更為準確的反映了巖石的粘彈性變形性能。