Search | Engineering

订阅投稿

首页学术期刊学术焦点学术视频工程成就工程前沿联系我们 English

资源类型

期刊论文 139

会议视频 1

年份

2023 16

2022 15

2021 7

2020 11

2019 8

2018 14

2017 11

2016 4

2015 3

2014 4

2013 7

2012 2

2011 2

2010 2

2009 8

2008 6

2007 6

2006 3

2005 3

2001 4

展开︾

关键词

增材制造 4

形状记忆合金 3

机器学习 3

4D打印 2

形状记忆聚合物 2

模态 2

AAC 1

ANSYS 1

B样条函数 1

CPU-GPU异构；多核；共享内存；访存调度 1

Ni–Ti–Cu–V合金 1

SoC 1

T形节点 1

“∞”形 1

三塔双跨悬索桥 1

三维人脸重建；级联回归；形状空间；实时 1

三维形貌测量 1

中间钢塔 1

展开︾

检索范围：

排序：展示方式：

Temperature effects of shape memory alloys (SMAs) in damage control design of steel portal frames

Xiaoqun LUO, Hanbin GE, Tsutomu USAMI

《结构与土木工程前沿（英文）》 2012年第6卷第4期页码 348-357 doi: 10.1007/s11709-012-0176-4

摘要： The objective of the present study is to analytically investigate temperature effects of an axial-type seismic damper made of shape memory alloys (SMAs) equipped in steel frames. Based on a modified multilinear one dimensional constitutive model of SMAs, two types of SMAs are employed, which have different stress plateau and different stress growth rate with temperature increase. Temperature effects of SMA dampers on seismic performance upgrading are discussed in three aspects: different environment temperatures; rapid loading rate induced heat generation and different SMA fractions. The analysis indicates that the effect of environment temperature should be considered for the SMA damper in steel frames. However, the rapid loading rate induced heat generation has little adverse effect.

关键词： damage control design shape memory alloy temperature effect

HTML PDF 收藏

An extended thermo-mechanically coupled algorithm for simulation of superelasticity and shape memoryeffect in shape memory alloys

S. HASHEMI,H. AHMADIAN,S. MOHAMMADI

《结构与土木工程前沿（英文）》 2015年第9卷第4期页码 466-477 doi: 10.1007/s11709-015-0300-3

摘要： Thermo-mechanical coupling in shape memory alloys is a very complicated phenomenon. The heat generation/absorption during forward/reverse transformation can lead to temperature-dependent variation of its mechanical behavior in the forms of superelasticity and shape memory effect. However, unlike the usual assumption, slow loading rate cannot guarantee an isothermal process. A two-dimensional thermo-mechanically coupled algorithm is proposed based on the original model of Lagoudas to efficiently model both superelasticity and shape memory effects and the influence of various strain rates, aspect ratios and boundary conditions. To implement the coupled model into a finite element code, a numerical staggered algorithm is employed. A number of simulations are performed to verify the proposed approach with available experimental and numerical data and to assess its efficiency in solving complex SMA problems.

关键词： shape memory alloy thermo-mechanical coupling superplasticity shape memory effect

HTML PDF 收藏

Resiliency of steel and composite structures

Roberto T. LEON,Yu GAO

《结构与土木工程前沿（英文）》 2016年第10卷第3期页码 239-253 doi: 10.1007/s11709-016-0349-7

摘要： This paper is divided into two parts. The first part addresses the resiliency and sustainability of steel and composite structures from a fundamental standpoint, and it is intended as an introduction to the other six papers that form part of this issue related to resiliency of steel structural systems in seismic areas. The paper posits the idea that resiliency is a characteristic that embodies sustainability rather than the traditional opposite point of view. The second part of the paper is divided into two sections, with the first section describing a number of retrofit technologies with recentering characteristics that have been developed for small, seismically deficient buildings in developing countries. The second section describes an innovative connection between circular concrete filled tubes and conventional beams with reduced flange sections consisting of steel and shape memory alloy bars and end plates. The connection has partial restraint behavior and strong recentering properties. This connection is used to demonstrate that some creative thinking can lead to innovative ways of addressing issues related to robustness, resiliency and sustainability of steel structures.

关键词： steel structures resiliency sustainability recentering systems shape memory alloys

HTML PDF 收藏

A novel shape memory alloy actuated soft gripper imitated hand behavior

《机械工程前沿（英文）》 2022年第17卷第4期 doi: 10.1007/s11465-022-0700-8

摘要： The limited length shrinkage of shape memory alloy (SMA) wire seriously limits the motion range of SMA-based gripper. In this paper, a new soft finger without silicone gel was designed based on pre bent SMA wire, and the finger was back to its original shape by heating SMA wire, rather than relying only on heat exchange with the environment. Through imitating palm movement, a structure with adjustable spacing between fingers was made using SMA spring and rigid spring. The hook structure design at the fingertip can form self-locking to further improve the load capacity of gripper. Through the long thin rod model, the relationship of the initial pre bent angle on the bending angle and output force of the finger was analyzed. The stress-strain model of SMA spring was established for the selection of rigid spring. Three grasping modes were proposed to adapt to the weight of the objects. Through the test of the gripper, it was proved that the gripper had large bending amplitude, bending force, and response rate. The design provides a new idea for the lightweight design and convenient design of soft gripper based on SMA.

关键词： shape memory alloy (SMA) pre bent wire gripper grasping mode lightweight

HTML PDF 收藏

Experimental flexural behavior of SMA-FRP reinforced concrete beam

Adeel ZAFAR, Bassem ANDRAWES

《结构与土木工程前沿（英文）》 2013年第7卷第4期页码 341-355 doi: 10.1007/s11709-013-0221-y

摘要： The most critical drawback in currently used steel reinforcement in reinforced concrete (RC) structures is susceptibility to accumulation of plastic deformation under excessive loads. Many concrete structures due to damaged (yielded) steel reinforcement have undergone costly repairs and replacements. This research presents a new type of shape memory alloy (SMA)-based composite reinforcement with ability to withstand high elongation while exhibiting pseudo-elastic behavior. In this study, small diameter SMA wires are embedded in thermoset resin matrix with or without additional glass fibers to develop composite reinforcement. Manufacturing technique of new proposed composite is validated using microscopy images. The proposed SMA-FRP composite square rebars are first fabricated and then embedded in small scale concrete T-beam. 3-point bending test is conducted on manufactured RC beam using a cyclic displacement controlled regime until failure. It is found that the SMA-FRP composite reinforcement is able to enhance the performance of concrete member by providing re-centering and crack closing capability.

关键词： re-centering shape memory alloys concrete composite fiber reinforced polymer scanning electron microscopy

HTML PDF 收藏

Improvement of impact resistance of plain-woven composite by embedding superelastic shape memory alloy

Xiaojun GU, Xiuzhong SU, Jun WANG, Yingjie XU, Jihong ZHU, Weihong ZHANG

《机械工程前沿（英文）》 2020年第15卷第4期页码 547-557 doi: 10.1007/s11465-020-0595-1

摘要： Carbon fiber reinforced polymer (CFRP) composites have excellent mechanical properties, specifically, high specific stiffness and strength. However, most CFRP composites exhibit poor impact resistance. To overcome this limitation, this study presents a new plain-woven CFRP composite embedded with superelastic shape memory alloy (SMA) wires. Composite specimens are fabricated using the vacuum-assisted resin injection method. Drop-weight impact tests are conducted on composite specimens with and without SMA wires to evaluate the improvement of impact resistance. The material models of the CFRP composite and superelastic SMA wire are introduced and implemented into a finite element (FE) software by the explicit user-defined material subroutine. FE simulations of the drop-weight impact tests are performed to reveal the superelastic deformation and debonding failure of the SMA inserts. Improvement of the energy absorption capacity and toughness of the SMA-CFRP composite is confirmed by the comparison results.

关键词： carbon fiber reinforced polymer composite shape memory alloy wire impact resistance drop-weight test finite element simulation

HTML PDF 收藏

A fully solid-state cold thermal energy storage device for car seats using shape-memory alloys

《能源前沿（英文）》页码 504-515 doi: 10.1007/s11708-022-0855-3

摘要： Thermal energy storage has been a pivotal technology to fill the gap between energy demands and energy supplies. As a solid-solid phase change material, shape-memory alloys (SMAs) have the inherent advantages of leakage free, no encapsulation, negligible volume variation, as well as superior energy storage properties such as high thermal conductivity (compared with ice and paraffin) and volumetric energy density, making them excellent thermal energy storage materials. Considering these characteristics, the design of the shape-memory alloy based the cold thermal energy storage system for precooling car seat application is introduced in this paper based on the proposed shape-memory alloy-based cold thermal energy storage cycle. The simulation results show that the minimum temperature of the metal boss under the seat reaches 26.2 °C at 9.85 s, which is reduced by 9.8 °C, and the energy storage efficiency of the device is 66%. The influence of initial temperature, elastocaloric materials, and the shape-memory alloy geometry scheme on the performance of car seat cold thermal energy storage devices is also discussed. Since SMAs are both solid-state refrigerants and thermal energy storage materials, hopefully the proposed concept can promote the development of more promising shape-memory alloy-based cold and hot thermal energy storage devices.

关键词： shape-memory alloy (SMA) elastocaloric effect (eCE) cooled seat cold thermal energy storage

HTML PDF 收藏

A mini review: Shape memory polymers for biomedical applications

Kaojin Wang, Satu Strandman, X. X. Zhu

《化学科学与工程前沿（英文）》 2017年第11卷第2期页码 143-153 doi: 10.1007/s11705-017-1632-4

摘要： Shape memory polymers (SMPs) are smart materials that can change their shape in a pre-defined manner under a stimulus. The shape memory functionality has gained considerable interest for biomedical applications, which require materials that are biocompatible and sometimes biodegradable. There is a need for SMPs that are prepared from renewable sources to be used as substitutes for conventional SMPs. In this paper, advances in SMPs based on synthetic monomers and bio-compounds are discussed. Materials designed for biomedical applications are highlighted.

关键词： shape memory polymer biodegradability biocompatibility biomedical application bile acids

HTML PDF 收藏

Deformation analysis of shape memory polymer for morphing wing skin under airflow

Weilong YIN, Jingcang LIU, Jinsong LENG,

《机械工程前沿（英文）》 2009年第4卷第4期页码 447-449 doi: 10.1007/s11465-009-0062-5

摘要： The method for analyzing the out-of-plane deformation of a flexible skin under airflow is developed in this paper. The aerodynamic analysis is performed using the CFD software, and the structural analysis is performed using finite element method. The chief aim of the present study is to investigate the out-of-plane deformation of the shape memory polymer (SMP) skin at different temperatures. Numerical results show that the maximum out-of-plane displacement of the SMP skin increases with increasing temperature. When the SMP skin is heated to 53°C, the maximum out-of-plane displacement is about 7 mm. It decreases by 72%, when the SMP skin is applied with a uniform pre-strain of 0.1.

关键词： aircraft morphing skin shape memory polymer (SMP) deformation pre-strain

HTML PDF 收藏

Topology optimization and seismic collapse assessment of shape memory alloy (SMA)-braced frames: Effectiveness

Aydin HASSANZADEH; Saber MORADI

《结构与土木工程前沿（英文）》 2022年第16卷第3期页码 281-301 doi: 10.1007/s11709-022-0807-3

摘要： This paper presents a seismic topology optimization study of steel braced frames with shape memory alloy (SMA) braces. Optimal SMA-braced frames (SMA-BFs) with either Fe-based SMA or NiTi braces are determined in a performance-based seismic design context. The topology optimization is performed on 5- and 10-story SMA-BFs considering the placement, length, and cross-sectional area of SMA bracing members. Geometric, strength, and performance-based design constraints are considered in the optimization. The seismic response and collapse safety of topologically optimal SMA-BFs are assessed according to the FEMA P695 methodology. A comparative study on the optimal SMA-BFs is also presented in terms of total relative cost, collapse capacity, and peak and residual story drift. The results demonstrate that Fe-based SMA-BFs exhibit higher collapse capacity and more uniform distribution of lateral displacement over the frame height while being more cost-effective than NiTi braced frames. In addition to a lower unit price compared to NiTi, Fe-based SMAs reduce SMA material usage. In frames with Fe-based SMA braces, the SMA usage is reduced by up to 80%. The results highlight the need for using SMAs with larger recoverable strains.

关键词： topology optimization shape memory alloy Fe-based SMA steel braced frames performance-based seismic design collapse assessment

HTML PDF 收藏

双向4D打印——对3D打印形状记忆材料可逆性的回顾

Amelia Yilin Lee, Jia An, Chee Kai Chua

《工程（英文）》 2017年第3卷第5期页码 663-674 doi: 10.1016/J.ENG.2017.05.014

摘要：

增材制造技术的快速发展和形状记忆材料的进步推动了四维（4D）打印的发展。由于一定程度上的外部刺激，人机交互作用、传感器和电池的需求将被消除，通过使用增材制造技术，可以生产出更复杂的设备和零部件。随着目前对形状记忆机制的理解和对增材制造技术的改进设计，4D 打印的可逆性已经被证明是可行的。传统的单向4D 打印需要在编程（或定型）阶段进行人机交互，但是可逆的4D 打印或双向4D 打印将完全消除对人为干预的需求，因为编程阶段被另一种外界刺激所取代。这使得可逆4D 打印部件完全依赖外部刺激。零部件在每次回收后都可能被重复利用，甚至在某个周期中可以持续使用——这是一个具有工业运用吸引力的方面。本文综述了影响4D 打印的形状记忆材料的机制，目前在合金和聚合物上的4D 打印研究结果，以及它们各自存在的一些局限性。对形状记忆材料的可逆性和利用三维（3D）打印技术制作的可行性进行了总结和分析。在对可逆4D 打印技术相关内容的介绍中，本文也强调了3D 打印技术的方法、相关驱动的机制以及实现可逆性的策略。最后，提出了可逆4D 打印技术未来的研究方向。

关键词： 4D打印增材制造形状记忆材料智能材料形状记忆合金形状记忆聚合物

HTML PDF 收藏

Ni-Ti-Cu-V四元薄膜库中微观结构和相变的组合合成和高通量表征 Article

Naila M. Al Hasan, Huilong Hou, Suchismita Sarkar, Sigurd Thienhaus, Apurva Mehta, Alfred Ludwig, Ichiro Takeuchi

《工程（英文）》 2020年第6卷第6期页码 637-643 doi: 10.1016/j.eng.2020.05.003

摘要：

过去70年来，基于Ni-Ti的形状记忆合金（shape memory alloy, SMA）已得到广泛使用，但是提高其功能稳定性仍然是实现更稳健和更高级应用的关键。

关键词： Ni–Ti–Cu–V合金组合材料科学四元合金形状记忆合金薄膜库弹性冷却热弹性冷却相变高通量表征属性映射机器学习

HTML PDF 收藏

Pt-Ni nanourchins as electrocatalysts for oxygen reduction reaction

Qiaowan CHANG, Yuan XU, Shangqian ZHU, Fei XIAO, Minhua SHAO

《能源前沿（英文）》 2017年第11卷第3期页码 254-259 doi: 10.1007/s11708-017-0493-3

摘要： Pt-Ni bimetallic alloys with various nanostructures have shown excellent activity toward oxygen reduction reaction (ORR). The ORR activity is highly dependent on the structure of the catalyst. In this paper, Pt-Ni nanourchins were synthesized with an average size of 50 nm consisting of 10–20 nanorods and nanooctahedra by adjusting the synthesis condition. The formation of Pt-Ni nanourchins is mainly dependent on the adding order of solvents (benzyl ether, oleylamine and oleic acid). Pt-Ni nanourchins present a reasonable high ORR activity (0.81 A/mg at 0.9 V).

关键词： Pt-Ni alloys nanourchins oxygen reduction reaction shape control fuel cells

HTML PDF 收藏

Structural design of morphing trailing edge actuated by SMA

Qi WANG, Zhiwei XU, Qian ZHU

《机械工程前沿（英文）》 2013年第8卷第3期页码 268-275 doi: 10.1007/s11465-013-0261-y

摘要：

In this paper, the morphing trailing edge is designed to achieve the up and down deflection under the aerodynamic load. After a detailed and accurate computational analysis to determine the SMA specifications and layout programs, a solid model is created in CATIA and the structures of the morphing wing trailing edge are produced by CNC machining. A set of DSP measurement and control system is designed to accomplish the controlling experiment of the morphing wing trailing edge. At last, via the force analysis, the trailing edge is fabricated with four sections of aluminum alloy, and the arrangement scheme of SMA wires is determined. Experiment of precise control integral has been performed to survey the control effect. The experiment consists of deflection angle tests of the third joint and the integral structure. Primarily, the ultimate deflection angle is tested in these two experiments. Therefore, the controlling experiment of different angles could be performed within this range. The results show that the deflection error is less than 4% and response time is less than 6.7 s, the precise controlling of the morphing trailing edge is preliminary realized.

关键词： morphing wing trailing edge shape memory alloy digital signal processor PID algorithm

HTML PDF 收藏

“天问一号”火星探测中大折叠比形状记忆可展开子系统 Article

Chengjun Zeng, Liwu Liu, Yang Du, Miao Yu, Xiaozhou Xin, Tianzhen Liu, Peilei Xu, Yu Yan, Dou Zhang, Wenxu Dai, Xin Lan, Fenghua Zhang, Linlin Wang, Xue Wan, Wenfeng Bian, Yanju Liu, Jinsong Leng

《工程（英文）》 2023年第28卷第9期页码 52-60 doi: 10.1016/j.eng.2023.01.005

摘要：

Once China's Tianwen-1 Mars probe arrived in a Mars orbit after a seven-month flight in the deep cold space environment, it would be urgently necessary to monitor its state and the surrounding environment. To address this issue, we developed a flexible deployable subsystem based on shape memory polymer composites (SMPC-FDS) with a large folding ratio, which incorporates a camera and two temperature
telemetry points for monitoring the local state of the Mars orbiter and the deep space environment. Here, we report on the development, testing, and successful application of the SMPC-FDS. Before reaching its Mars remote-sensing orbit, the SMPC-FDS is designed to be in a folded state with high stiffness; after reaching orbit, it is in a deployed state with a large envelope. The transition from the folded state to the
deployed state is achieved by electrically heating the shape memory polymer composites (SMPCs); during this process, the camera on the SMPC-FDS can capture the local state of the orbiter from multiple angles. Moreover, temperature telemetry points on the SMPC-FDS provide feedback on the environment temperature and the temperature change of the SMPCs during the energization process. By simulating a
Mars on-orbit space environment, the engineering reliability of the SMPC-FDS was comprehensively verified in terms of the material properties, structural dynamic performance, and thermal vacuum deployment feasibility. Since the launch of Tianwen-1 on 23 July 2020, scientific data on the temperature environment around Tianwen-1 has been successfully acquired from the telemetry points on the
SMPC-FDS, and the local state of the orbiter has been photographed in orbit, showing the national flag of China fixed on the orbiter.

关键词： Flexible deployable structure Shape memory polymer composite Mars exploration Temperature telemetry On-orbit deployment

HTML PDF 收藏

标题作者时间类型操作

Temperature effects of shape memory alloys (SMAs) in damage control design of steel portal frames

Xiaoqun LUO, Hanbin GE, Tsutomu USAMI

期刊论文

An extended thermo-mechanically coupled algorithm for simulation of superelasticity and shape memoryeffect in shape memory alloys

S. HASHEMI,H. AHMADIAN,S. MOHAMMADI

期刊论文

Resiliency of steel and composite structures

Roberto T. LEON,Yu GAO

期刊论文

A novel shape memory alloy actuated soft gripper imitated hand behavior

期刊论文

Experimental flexural behavior of SMA-FRP reinforced concrete beam

Adeel ZAFAR, Bassem ANDRAWES

期刊论文

Improvement of impact resistance of plain-woven composite by embedding superelastic shape memory alloy

Xiaojun GU, Xiuzhong SU, Jun WANG, Yingjie XU, Jihong ZHU, Weihong ZHANG

期刊论文

A fully solid-state cold thermal energy storage device for car seats using shape-memory alloys

期刊论文

A mini review: Shape memory polymers for biomedical applications

Kaojin Wang, Satu Strandman, X. X. Zhu

期刊论文

Deformation analysis of shape memory polymer for morphing wing skin under airflow

Weilong YIN, Jingcang LIU, Jinsong LENG,

期刊论文

Topology optimization and seismic collapse assessment of shape memory alloy (SMA)-braced frames: Effectiveness

Aydin HASSANZADEH; Saber MORADI

期刊论文

双向4D打印——对3D打印形状记忆材料可逆性的回顾

Amelia Yilin Lee, Jia An, Chee Kai Chua

期刊论文

Ni-Ti-Cu-V四元薄膜库中微观结构和相变的组合合成和高通量表征

Naila M. Al Hasan, Huilong Hou, Suchismita Sarkar, Sigurd Thienhaus, Apurva Mehta, Alfred Ludwig, Ichiro Takeuchi

期刊论文

Pt-Ni nanourchins as electrocatalysts for oxygen reduction reaction

Qiaowan CHANG, Yuan XU, Shangqian ZHU, Fei XIAO, Minhua SHAO

期刊论文

Structural design of morphing trailing edge actuated by SMA

Qi WANG, Zhiwei XU, Qian ZHU

期刊论文

“天问一号”火星探测中大折叠比形状记忆可展开子系统

Chengjun Zeng, Liwu Liu, Yang Du, Miao Yu, Xiaozhou Xin, Tianzhen Liu, Peilei Xu, Yu Yan, Dou Zhang, Wenxu Dai, Xin Lan, Fenghua Zhang, Linlin Wang, Xue Wan, Wenfeng Bian, Yanju Liu, Jinsong Leng

期刊论文

京公网安备 11010502051620号京ICP备11030251号-2

关注我们