| 模拟镍基单晶合金复杂应力状态试样型式分析设计 |
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| 引用本文： | 岳珠峰,韩宏宪,吕震宙.模拟镍基单晶合金复杂应力状态试样型式分析设计[J].航空材料学报,1997(2). |
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| 作者姓名： | 岳珠峰 韩宏宪 吕震宙 |
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| 作者单位： | 西北工业大学!西安，710072，西北工业大学，西北工业大学 |
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| 基金项目： | 国家自然科学基金，航空科学基金，西安交通大学力学开放实验室基金 |
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| 摘 要： | 计算分析指出对于以滑移为基本变形机理的镍基单晶合金，受拉扭外载的薄壁圆筒试样其滑移分切应力沿周向不再均匀分布，平板剪切试样其受剪面处于正应力和剪应力共用作用，都不适宜作为复杂应力状态试样。带缺口双剪试样适合于模拟复杂应力状态，但缺口的大小和形状影响受剪面的应力分布。本文在数值计算的基础上，给出了最适宜的试样尺寸及变形量的计算公式；针对国产DD3单晶，进行了初步的试验。
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| 关 键 词： | 镍基单晶合金 复杂应力状态 试样型式 晶体取向相关性 |
DESIGN OF THE SPECIMENS FOR MODELING MULTIAXIAL STRESS STATES FOR Ni-BASE SINGLE CRYSTAL SUPERALLOYS |
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| Yue Zhufeng,Han Hongxian,Lu Zhenzhou.DESIGN OF THE SPECIMENS FOR MODELING MULTIAXIAL STRESS STATES FOR Ni-BASE SINGLE CRYSTAL SUPERALLOYS[J].Journal of Aeronautical Materials,1997(2). |
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| Authors: | Yue Zhufeng Han Hongxian Lu Zhenzhou |
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| Institution: | Northwestern Polytechnical University |
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| Abstract: | Based on the anisotropic crystallographic finite element analyses, some mulitiaxial stress specimens are considered. The thin-walled tubular specimens and plate shear specimens are not suitable for the single crystal superalloys, owing to the single shear stress state could not be occured. With a special sizes, thenotched double shear specimens can he used to model the multiaxial stress stares. In this paper, the size of the specimen has .been analyzed, and the analytical equations for resolved shear stress and shear strain are presented. The experimental results of double shear tests show that there are striking dependence of creep behavior on crystallographic orientations in the multiaxial stress states. |
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| Keywords: | multiaxial stress state specimens nickel-based single crystal superalloys |
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