ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems最新文献_第7页

DfAM of Nonlinear Cellular Flexible Structures 非线性元胞柔性结构的DfAM

ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems Pub Date : 2019-12-05 DOI: 10.1115/smasis2019-5673

Jelena Djokikj, J. Jovanova

{"title":"DfAM of Nonlinear Cellular Flexible Structures","authors":"Jelena Djokikj, J. Jovanova","doi":"10.1115/smasis2019-5673","DOIUrl":"https://doi.org/10.1115/smasis2019-5673","url":null,"abstract":"\u0000 Nonlinear cellular structures are defined as structures with multiple scale unit cells patterned through the volume of the structure. The geometrical nonlinearity allows local high flexibility in the movement and also in the sense of strength of materials.\u0000 The focus of this paper is to create a framework for design for additive manufacturing (DfAM) of a modular nonlinear cellular structure with high level of flexibility. The flexibility will be exploited in skin-like structures adaptable to freeform geometries or utilize flat printed designs for voluminous and structural 3D shapes.\u0000 For the modeling of the structure CAD software is used and for the fabrication of the structure additive manufacturing (AM) is applied. These technologies work by adding the material in layers, which enables fabrication of parts with complex geometries. The working principal of AM which is opposite to the traditional manufacturing requires for changes in the design process. These changes are applied in the DfAM that we are presenting with this study. The DfAM is used to develop a systematic design approach to support the fabrication of unique structure shapes by AM.","PeriodicalId":235262,"journal":{"name":"ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130525660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

3D Printed Segmented Flexible Pneumatic Actuator 3D打印分段柔性气动执行器

ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems Pub Date : 2019-12-05 DOI: 10.1115/smasis2019-5645

D. Gonzalez, J. García, B. Newell

引用次数: 0

Control of Brake Squeal Using Shunted Piezoelectric Pads 分路压电片控制刹车尖叫

ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems Pub Date : 2019-12-05 DOI: 10.1115/smasis2019-5548

Yaqoub Abdullah, A. Baz

{"title":"Control of Brake Squeal Using Shunted Piezoelectric Pads","authors":"Yaqoub Abdullah, A. Baz","doi":"10.1115/smasis2019-5548","DOIUrl":"https://doi.org/10.1115/smasis2019-5548","url":null,"abstract":"\u0000 Brake squeal phenomenon poses serious challenges to the automotive industry due to its technical complexity and the pressing need for mitigating its undesirable effects. More importantly, brake squeal causes significant customer dissatisfaction and adversely affects the subjective quality of the vehicles. These effects have substantial economic impact on the automotive industry. Furthermore, it is essential to properly treat the brake squeal problems in order to avoid unexpected catastrophic failure of the brake system.\u0000 In this paper, it is proposed to mitigate the brake squeal problems by providing the brake pads with piezoelectric patches which are shunted by properly tuned electric networks. The shunted piezoelectric pads offer a unique ability to convert the mechanical energy induced by the brake squeal into electrical energy which can be dissipated into the network in order to enhance the damping and stability characteristics of the brake system. Accordingly, it is envisioned that the proposed approach would enable the disc brake systems to operate over broad ranges of operating parameters without experiencing the adverse effects of brake squeal.\u0000 The proposed system is modeled by a simple two Degree-Of-Freedom (DOF) disc brake model. The structural DOF are integrated with the constitutive model of the shunted piezoelectric network in order to predict the threshold of brake squeal. The stability limits of the proposed brake system are established as a function of the design parameters of the shunted piezoelectric network. Numerical examples are presented to demonstrate the effectiveness of the proposed system in expanding the operating range of the brake system without experiencing squeal problems.\u0000 Application of the proposed system to a distributed disc brake system model is a natural extension of the present work.","PeriodicalId":235262,"journal":{"name":"ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133576041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Self-Sensing Composite Materials With Intelligent Fabrics 具有智能织物的自传感复合材料

ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems Pub Date : 2019-12-05 DOI: 10.1115/smasis2019-5684

Federico Fabriani, G. Lanzara

引用次数: 0

Shape Memory Alloys in Continuum and Soft Robotic Applications 形状记忆合金在连续体和软机器人中的应用

ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems Pub Date : 2019-12-05 DOI: 10.1115/smasis2019-5610

Yannik Goergen, R. Chadda, R. Britz, D. Scholtes, Nataliya Koev, Paul Motzki, R. Werthschützky, M. Kupnik, S. Seelecke

{"title":"Shape Memory Alloys in Continuum and Soft Robotic Applications","authors":"Yannik Goergen, R. Chadda, R. Britz, D. Scholtes, Nataliya Koev, Paul Motzki, R. Werthschützky, M. Kupnik, S. Seelecke","doi":"10.1115/smasis2019-5610","DOIUrl":"https://doi.org/10.1115/smasis2019-5610","url":null,"abstract":"\u0000 Continuum robots are inspired by biological trunks, snakes and tentacles. Unlike conventional robot manipulators, there are no rigid structures or joints. Advantageous is the ease of miniaturization combined with high dexterity, since limiting components such as bearings or gears can be omitted. Most currently used actuation elements in continuum robots require a large drive unit with electric motors or similar mechanisms. Contrarily, shape memory alloys (SMAs) can be integrated into the actual robot. The actuation is realized by applying current to the wires, which eliminates the need of an additional outside drive unit. In the presented study, SMA actuator wires are used in variously scaled continuum robots. Diameters vary from 1 to 60 mm and the lengths of the SMA driven tentacles range from 75 to 220 mm. The SMAs are arranged on an annulus in a defined distance to the neutral fiber, whereby the used cores vary from superelastic NiTi rods to complex structures and also function as restoring unit. After outlining the theoretical basics for the design of an SMA actuated continuum robot, the design process is demonstrated exemplarily using a guidewire for cardiac catheterizations. Results regarding dynamics and bending angle are shown for the presented guidewire.","PeriodicalId":235262,"journal":{"name":"ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125090341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

4D Printed Shape Memory Polymer Composite Structures for Deployable Small Spacecrafts 用于可展开小型航天器的4D打印形状记忆聚合物复合结构

ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems Pub Date : 2019-12-05 DOI: 10.1115/smasis2019-5583

M. Herath, Mainul Islam, J. Epaarachchi, Fenghua Zhang, J. Leng

{"title":"4D Printed Shape Memory Polymer Composite Structures for Deployable Small Spacecrafts","authors":"M. Herath, Mainul Islam, J. Epaarachchi, Fenghua Zhang, J. Leng","doi":"10.1115/smasis2019-5583","DOIUrl":"https://doi.org/10.1115/smasis2019-5583","url":null,"abstract":"\u0000 Four dimensional (4D) printing is the convergence of three dimensional (3D) printing, which is an emerging additive manufacturing technology for smart materials. 4D printing is referred to the capability of changing the shape, property, or functionality of a 3D printed structure under a particular external stimulus. This paper presents the structural performance, shape memory behavior and photothermal effect of 4D printed pristine shape memory polymer (SMP) and it’s composite (SMPC) with multi-walled carbon nanotubes (MWCNTs). Both materials have demonstrated the ability to retain a temporary shape and then recover their original. It is revealed that the incorporation of MWCNTs into the SMP matrix has enhanced the light stimulus shape recovery capabilities. Light stimulus shape transformation of 4D printed SMPC is advantageous for space engineering applications as light can be focused onto a particular area at a long distance. Subsequently, a model 4D printed deployable boom, which is applicable for small spacecrafts is presented. The shape fixity and recovery behaviors of the proposed boom have been investigated. Notably, the model boom structure has demonstrated ∼86 % shape recovery ratio. The proposed innovative approach of additive manufacturing based deployable composite structures will shape up the future space technologies.","PeriodicalId":235262,"journal":{"name":"ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124219728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Finite Element-Based Numerical Investigations of a Beamlike Actuator Combining Shape Memory and Superelastic Effects 结合形状记忆和超弹性效应的类梁驱动器的有限元数值研究

ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems Pub Date : 2019-12-05 DOI: 10.1115/smasis2019-5546

Danillo C. Reis, D. Rade, O. Santos

{"title":"Finite Element-Based Numerical Investigations of a Beamlike Actuator Combining Shape Memory and Superelastic Effects","authors":"Danillo C. Reis, D. Rade, O. Santos","doi":"10.1115/smasis2019-5546","DOIUrl":"https://doi.org/10.1115/smasis2019-5546","url":null,"abstract":"\u0000 It has been amply demonstrated that the development of SMA actuators has a great potential of application in several branches of industry. Obviously, the efficiency of the actuators depends both on the inherent features of the materials they are made of and the geometric characteristics of the devices. This work considers a particular type of actuator first conceived by [1], consisting in the association of two cantilever beams, the first presenting the shape memory effect and the second presenting the superelastic effect, coupled mechanically so as to guarantee two equilibrium positions and thus a stand-alone cyclic actuator, in which the superelastic beam provides the bias action. Numerical simulations of the behavior of the actuator are performed using the commercial finite element software COMSOL, which implements the Boyd-Lagoudas thermomechanical model. The goal of the simulations is to characterize the actuation range of the actuator, in terms of maximum displacement obtained at the tip. The effect of the dimensions of the beams on the tip displacement under some load scenarios is investigated. The results provide guidelines for the design of the actuator to fulfill specific requirements, also suggesting the use of numerical optimization for the optimal design of the actuator accounting for constraints.","PeriodicalId":235262,"journal":{"name":"ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124174041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrasonic De-Icing System for Leading Edge in Composite Material 复合材料前缘超声除冰系统

ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems Pub Date : 2019-12-05 DOI: 10.1115/smasis2019-5627

L. Maio, S. Ameduri, V. Memmolo, F. Ricci, A. Concilio

引用次数: 2

Pneumatic Artificial Muscle Actuators With Integrated Controls for Space Flight Applications 用于航天飞行的集成控制气动人工肌肉执行器

ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems Pub Date : 2019-12-05 DOI: 10.1115/smasis2019-5630

Christopher J. Netwall, James P. Thomas, M. Kubista, Kerry A. Griffith, Christopher Kindle, Jordan Schlater, Joseph T. Hays, Phillip A. Feerst, N. Wereley

{"title":"Pneumatic Artificial Muscle Actuators With Integrated Controls for Space Flight Applications","authors":"Christopher J. Netwall, James P. Thomas, M. Kubista, Kerry A. Griffith, Christopher Kindle, Jordan Schlater, Joseph T. Hays, Phillip A. Feerst, N. Wereley","doi":"10.1115/smasis2019-5630","DOIUrl":"https://doi.org/10.1115/smasis2019-5630","url":null,"abstract":"\u0000 The U.S. Naval Research Laboratory (NRL) has been developing a space-rated 7 degree of freedom (DOF) robot arm with a high payload-to-mass ratio as an alternative design to motor-gear driven robotic manipulators. The robot arm employs antagonistic pairs of pneumatic artificial muscle (PAM) actuators to control each degree-of-freedom (DOF) to achieve large force outputs relative to the PAM component masses. A novel feature of the NRL PAM actuator was the integration of the pneumatic control components inside the pressure-bladder, which not only reduces the volume of the robotic arm hardware but also reduces the pressurized-gas actuation volume in the PAM enabling significant reductions in gas consumption during actuation. This multifunctional design enables reductions in launch-weight costs and increases in operational endurance for space applications. The integration of these PAMs into a well-designed robotic-arm structure, in tandem with a newly developed control algorithm, has the potential to exceed the performance metrics of traditional motor-driven robot arms. This paper describes the development of the improved efficiency PAM design that is advancing this technology towards space flight readiness.","PeriodicalId":235262,"journal":{"name":"ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134492056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photo-Triggered Soft Materials With Differentiated Diffusive Pathways 具有差异化扩散路径的光触发软材料

ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems Pub Date : 2019-12-05 DOI: 10.1115/smasis2019-5525

Michelle M. Makhoul-Mansour, E. Freeman

{"title":"Photo-Triggered Soft Materials With Differentiated Diffusive Pathways","authors":"Michelle M. Makhoul-Mansour, E. Freeman","doi":"10.1115/smasis2019-5525","DOIUrl":"https://doi.org/10.1115/smasis2019-5525","url":null,"abstract":"\u0000 Controlled diffusive transport between regions within a compartmentalized structure is an essential feature of cellular-inspired materials. Using the droplet interface bilayer (DIB) technique, biomolecular soft materials can be constructed in an oil medium by connecting multiple lipid-coated microdroplets together through interfacial bilayers. While traditionally achieved through the incorporation of pore forming toxins (PFTs), signal propagation within DIB assemblies can be remotely controlled through the integration of photopolymerizable phospholipids (23:2 DiynePC) into the aqueous phase. Since such strategy allows for the formation of UV-C triggered pathways only between droplets both containing DiynePC, polymerizable phospholipids have shown an advantage of reducing undesired diffusion and forming conductive pathways.\u0000 The partial polymerization of lipid bilayers formed through the DIB platform is still to this date underexplored in the literature. In a previous work, we have shown that the incorporation of 23:2 DiynePC into lipid bilayers allows for the creation of patterned conductive pathways in a 2D DIB structure. The properties of photosensitive bilayers were also investigated but not their channel activity. The functionalization of bilayers-based photosensitive structures through transmembrane channels remains an under-investigated mean of achieving further differentiated conductive channels. This work explores the reconstitution of several transmembrane channels such as alpha-hemolysin (αHL) and alamethicin (ALM) into partially polymerized lipid bilayers. We believe that the ability to incorporate transmembrane channels into photosensitive DIB soft structures allows for further differentiation of signal propagation pathways by including both edge-defect induced pores as well as more traditional and bio-derived transporters.","PeriodicalId":235262,"journal":{"name":"ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115895933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0