Processing and constituitive modeling of porous shape memory alloys.

机译：多孔形状记忆合金的加工和本构模型。

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The present study is devoted to processing and constitutive modeling of dense and porous SMAs. A novel Spark Plasma Sintering setup is developed, compared to the conventional setup and used for dense/porous NiTi processing. It is characterized by considerably higher current density through the sample at the same total current, as well as drastically decreased heat losses. A 2D axial symmetry electro-thermal Finite Element analysis of the processing zone, in addition to a detailed characterization of the synthesis method and the final product, is also performed. Dense samples (6.17 gcm-3 and 97% NiTi phase) and porous samples (porosity up to 40%) are successfully produced. Another aim of the study is to develop an analytical model for porous SMAs. A set of governing equations for average state variables is rigorously investigated. Moving average technique is used and pore boundary terms that are not well recognized in the continuum mechanics community come into view.

机译：本研究致力于致密和多孔SMA的加工和本构模型。与常规装置相比，开发了一种新颖的火花等离子体烧结装置，并用于致密/多孔的NiTi处理。它的特点是在相同的总电流下通过样品的电流密度明显更高，并且热损失大大降低。除了详细描述合成方法和最终产品外，还对加工区进行了二维轴向对称电热有限元分析。成功生产了致密样品（6.17 gcm-3和97％的NiTi相）和多孔样品（孔隙率高达40％）。该研究的另一个目的是为多孔SMA建立分析模型。严格研究了一组用于平均状态变量的控制方程。使用了移动平均技术，并出现了在连续力学领域中未被很好认识的孔边界术语。

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作者
Chennoufi, Nejib.;
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University of Houston.;

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授予单位 University of Houston.;
学科 Engineering Mechanical.
学位 Ph.D.
年度 2009
页码 76 p.
总页数 76
原文格式 PDF
正文语种 eng
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专利

1. Modeling of transformation-induced plasticity and its effect on the behavior of porous shape memory alloys. Part Ⅱ: porous SMA response [J] . Pavlin B. Entchev, Dimitris C. Lagoudas Mechanics of materials . 2004,第9期

机译：转变诱导塑性的建模及其对多孔形状记忆合金行为的影响。第二部分：多孔SMA反应
2. Modeling of transformation-induced plasticity and its effect on the behavior of porous shape memory alloys. Part Ⅰ: constitutive model for fully dense SMAs [J] . Dimitris C. Lagoudas, Pavlin B. Entchev Mechanics of materials . 2004,第9期

机译：转变诱导塑性的建模及其对多孔形状记忆合金行为的影响。第一部分：全密度SMA的本构模型
3. GLOBAL SOLVABILITY OF A DISSIPATIVE FREMOND MODEL FOR SHAPE MEMORY ALLOYS. PART II: EXISTENCE [J] . Elena Bonetti Quarterly of Applied Mathematics . 2004,第1期

机译：形状记忆合金耗散弗雷蒙德模型的全局可解性。第二部分：存在
4. Some Tools for Modelling Shape Memory Alloys. Thermomechanical Behaviour and Some Efficient Use [C] . M. Lamine Boubakar, Christian Lexcellent World conference on structural control . 2003

机译：一些用于建模形状记忆合金的工具。热机械行为和一些有效的使用
5. Nanoscale studies of shape memory and superelastic properties of dual-phase shape memory alloys. [D] . Dar, Rebecca Dorothy. 2016

机译：纳米尺度研究双相形状记忆合金的形状记忆和超弹性。
6. Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation [O] . Marvin Schmidt, Johannes Ullrich, André Wieczorek, 2016

机译：基于形状记忆的弹性热过程研究的实验方法和模型验证
7. Cyclic characteristics of pseudoelasticity of Ti-Ni alloys. Effect of maximum strain, test temperature and shape memory processing temperature. [O] . Minoru KAWAGUCHI, Yoshio OHASHI, Hisaaki TOBUSHI 1990

机译：Ti-Ni合金伪弹性的循环特性。最大应变，试验温度和形状记忆处理温度的影响。
8. Dynamic-Data Driven Modeling of Uncertainties and 3D Effects of Porous Shape Memory Alloys. [R] . C. C. Douglas 2014

机译：多孔形状记忆合金不确定性和三维效应的动态数据驱动建模。

Processing and constituitive modeling of porous shape memory alloys.

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