SHAKEDOWN ANALYSIS OF THERMAL BARRIER COATING AND SIMPLIFIED ANALYTIC MODEL

DONG YaWen; ZHANG BaoFeng

doi:10.16579/j.issn.1001.9669.2015.04.014

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SHAKEDOWN ANALYSIS OF THERMAL BARRIER COATING AND SIMPLIFIED ANALYTIC MODEL

更新时间：2022-09-22

- SHAKEDOWN ANALYSIS OF THERMAL BARRIER COATING AND SIMPLIFIED ANALYTIC MODEL
- Journal of Mechanical Strength Vol. 37, Issue 4, Pages: 701-705(2015)
- 作者机构：
  
  1. 西安工程大学机电工程学院
  2. 西安理工大学机械与精密仪器工程学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2015.04.014
  CLC：
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DONG YaWen, ZHANG BaoFeng. SHAKEDOWN ANALYSIS OF THERMAL BARRIER COATING AND SIMPLIFIED ANALYTIC MODEL. [J]. 37(4):701-705(2015)
DOI：

DONG YaWen, ZHANG BaoFeng. SHAKEDOWN ANALYSIS OF THERMAL BARRIER COATING AND SIMPLIFIED ANALYTIC MODEL. [J]. 37(4):701-705(2015) DOI： 10.16579/j.issn.1001.9669.2015.04.014.

摘要

以"褶皱模型"为基础,建立了热障涂层体系理论模型,采用了温度参数法构造涂层体系的残余应力场,建立了涂层下限安定分析的有限元离散格式,分析了褶皱程度和氧化层厚度对涂层体系安定极限的影响。针对"褶皱模型"的几何特点,将其转化成三层厚壁圆筒模型,给出相应的安定极限的解析表达式,建立了热障涂层简化解析模型,与数值结果进行比较,该简化模型在C/L<1或C远远小于L,即褶皱程度不是很剧烈的情况下和数值结果较为贴近,可作为一种近似计算热障涂层安定极限的方法。

Abstract

Based on wrinkling model,a theoretical model for thermal barrier coating system was established. Using the temperature parameter method,the paper constructed the residual stress field of coating system,built the discrete format of finite element for lower coating shakedown analysis,and analyzed the effects of wrinkling degree and oxide layer thickness on coating system shakedown limit. Aiming at the geometric characteristics of wrinkling model,this paper translated it into a cylindrical model with three layers,provided analytic expressions for the shakedown limits,and then set up the simplified analytic model of thermal barrier coating. Compared with the numerical results,when C / L is less than 1 or C is far less than L,namely when wrinkle degree is not very drastic,the simplified model is close to the numerical results and it can be as an approximate calculation method for the shakedown limit of thermal barrier coating.

关键词

热障涂层安定残余应力褶皱模型

Keywords

Thermal barrier coatingShakedownResidual stressWrinkling model

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