| 含缺陷自增强厚壁圆筒塑性极限载荷分析 |
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| 引用本文： | 李强,李鹏辉,茹占勇,赵君官.含缺陷自增强厚壁圆筒塑性极限载荷分析[J].机械强度,2012(3):361-365. |
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| 作者姓名： | 李强 李鹏辉 茹占勇 赵君官 |
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| 作者单位： | 中北大学动力机械系,太原,030051 |
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| 基金项目： | 国家青年基金，山西省自然科学基金 |
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| 摘 要： | 基于有限元理论,建立内壁含椭球形凹坑的厚壁圆筒有限元模型,模拟厚壁圆筒自增强过程的应力应变。采用三种不同的方法计算含凹坑缺陷的自增强厚壁圆筒的结构极限载荷,给出不同尺寸缺陷对极限载荷的影响规律。通过对比自增强与非增强条件下的极限载荷,表明自增强技术不能有效提高厚壁圆筒的极限承载能力,但在结构极限载荷下,含凹坑缺陷的自增强厚壁圆筒存在一个缺陷尺寸相对不敏感区,对提高结构的安全性是有利的。
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| 关 键 词： | 极限载荷 自增强 厚壁圆筒 凹坑缺陷 有限元 |
ANALYSIS OF PLASTIC LIMIT LOAD OF AUTOFRETTAGE THICK-WALL CYLINDER WITH SLOT |
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| LI Qiang
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LI PengHui
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RU ZhanYong
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ZHAO JunGuan.ANALYSIS OF PLASTIC LIMIT LOAD OF AUTOFRETTAGE THICK-WALL CYLINDER WITH SLOT[J].Journal of Mechanical Strength,2012(3):361-365. |
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| Authors: | LI Qiang LI PengHui RU ZhanYong ZHAO JunGuan |
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| Affiliation: | (Department of Power Mechanical Engineering,North University of China,Taiyuan 030051,China) |
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| Abstract: | Based on the finite element(FE) model of thick-wall cylinder with part-through slots,three high efficient methods were adopted to analyze the plastic limit l oad of autofrettaged thick-wall cylinder with slots and calculate the strain an d stress under limit loading.According to the results of autofrettaged thick-w all cylinder plastic limit loads under different slots sizes,the autofrettage p rocess has very little effect on increasing the limit load of the thick-wall cy linder.But the autofrettaged thick-wall cylinder has an insensitive zone of sl ots size and benefits the structural safety. |
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| Keywords: | Limit load Autofrettage Thick-wall cylinder Part-through slot Finite element method |
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