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检索条件"丛书名=Mechanisms and Machine Science"

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Buckling Analysis of Symmetric Laminated Composite Plate Subjected to Biaxial Compressive Loading Using Finite Element Software 12th

Buckling Analysis of Symmetric Laminated Composite Plate Sub...

引用

12th International Conference of machine and Industrial Design in Mechanical Engineering

作者： Jeremic, Dejan Radic, Nebojsa Vucetic, Nikola Antunovic, Ranko Univ East Sarajevo Dept Appl Mech Fac Mech Engn East Sarajevo Bosnia & Herceg

ISBN: (纸本)9783031805141;9783031805127;9783031805110

This paper deals with analysis of symmetric laminated composite plates for critical buckling in biaxial loading. The minimum load at which the equilibrium is disturbed known as the critical buckling load. The study is focused on obtaining the critical buckling load of symmetric four layers laminated composite plate subjected to biaxial compressive loading, varying plate parameters a/b (aspect ratio) = 0.5 to 1 with 0.5 increment. Governing equations for buckling are derived based on Classical Laminated Plate Theory (CLPT) and computed critical buckling loads were compared with numerical results obtained using ANSYS the finite element software. The effect of aspect ratio is carried out to determine the variation in critical buckling loads.

关键词： Symmetric Composite Plate Orientation of Layers Critical Buckling Load

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Comparative Study of Different Software for Design Optimization 12th

Comparative Study of Different Software for Design Optimizat...

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12th International Conference of machine and Industrial Design in Mechanical Engineering

作者： Palinkas, Ivan Desnica, Eleonora Pekez, Jasmina Dezso, Gergely Radovanovic, Ljiljana Univ Novi Sad Tech Fac Mihajlo Pupin Zrenjanin Serbia Univ Nyiregyhaza Dept Phys & Prod Engn Inst Engn & Agr Nyiregyhaza Hungary

ISBN: (纸本)9783031805141;9783031805127;9783031805110

In mechanical engineering part design with usage of CAD/CAE software has become a necessity as one of the first steps in product production. In that stage, parts can be optimized or redesigned in order to achieve the requested design elements, like functionality, size, mechanical characteristics, etc. Through development of IT technologies, different software have almost the same possibilities for part optimization with application of various optimization algorithms. With that said, it is expected to obtain different optimization results with application of different optimization software. In this paper, we will compare the capabilities of Autodesk Inventor and SolidWorks to optimize part design for the purpose of mass reduction by using the topology optimization tools (Shape Generator in Autodesk Inventor and Topology optimization in SolidWorks) on example of mounting bracket.

关键词： Optimization Part design CAD/CAE software

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Design and Compressive Strength Analysis of a Bio-Inspired Cell-Based Lattice 12th

Design and Compressive Strength Analysis of a Bio-Inspired C...

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12th International Conference of machine and Industrial Design in Mechanical Engineering

作者： Angeleska, Elena Nestorovski, Blagoja Avramov, Nikola Djokikj, Jelena Ss Cyril & Methodius Univ Skopje Fac Mech Engn Skopje North Macedonia

ISBN: (纸本)9783031805141;9783031805127;9783031805110

The synergy between state-of-the-art additive manufacturing (AM) technologies and lattice structures offers numerous remarkable advantages which inspire engineers and designers to develop novel high-tech products and systems. By replacing traditional manufacturing methods with AM and conventional materials with architected cellular materials (lattices) an optimization of the mechanical characteristics can be achieved, such as: reduced weight, high strength, good force distribution, high energy absorption, etc. Since lattices are composed of unit cells that repeat regularly to form a periodic geometry, their structure is very controllable. The customization of the unit cell type, size, orientation, arrangement, and other features, directly affects the mechanical properties and the characteristics of the designed lattice product. Therefore, it has been a trend and challenge to experiment by varying the unit cell geometry to examine the change in performance of the lattice structures. In this research, a unique, bio-inspired unit cell was designed and evaluated with a goal to generate a lattice structure with improved compression characteristics. Inspiration was drawn from the seahorse skeleton, which similarly to the lattice geometry, is composed of repeated prism-like segments connected in a manner that allows incredible durability under impact. The new cell design was arranged to form a uniform lattice structure based on a geometric wireframe method. The evaluation procedure was done using an experimental test performed according to the ISO 604:2002(E) standard. The experiment was carried out on 2 types of lattice samples for comparison purposes. The novel lattice showed improved behavior under compression forces.

关键词： Lattice Structures Bio-inspired Lattice Seahorse Skeleton Lattice Compression Compression Strength Analysis

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Nondestructive Testing of Non-ferromagnetic Metal Coating Thickness on Steel Surface Based on Skin Effect 30th

Nondestructive Testing of Non-ferromagnetic Metal Coating Th...

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30th International Conference on Computational and Experimental Engineering and sciences

作者： Zhou, Ronghao Wang, Zizhen Liu, Jun Zhang, Rui Feng, Wei China Univ Petr Karamay 834000 Xinjiang Peoples R China China Univ Petr Beijing 102249 Peoples R China

ISBN: (纸本)9783031774911;9783031774898;9783031774881

This research proposes a new electromagnetic non-destructive testing method: the thickness of the coating is characterized by measuring the inductance of the plated part. This method is suitable for the measurement of the thickness of the non-ferromagnetic metal coating on the steel surface. The measurement principle of the new method is the inductance of the plated part is only related to the geometric state and magnetic permeability of the plated part and the environment, and the magnetic permeability of the coating is much smaller than that of the steel substrate. The thicker the coating, the smaller the inductance. At the same time, due to the skin effect, as the frequency of the excitation signal increases, the current is more and more concentrated on the surface where the non-ferromagnetic coating is located. The effect of the coating on the inductance becomes greater, and the inductance will obviously decrease with the increase of the excitation frequency, which must exist the most sensitive frequency of an inductance relative to the thickness of the coating. Choosing this frequency to measure the inductance of the plated part can obtain the best effect of measuring the thickness of the coating.

关键词： Coating thickness Nondestructive testing Skin effect Inductance Magnetic permeability

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A Temperature-Tolerant α-Amylase and Its Degradation Research on Oilfield Starch-Based Polymers 30th

A Temperature-Tolerant α-Amylase and Its Degradation Resear...

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30th International Conference on Computational and Experimental Engineering and sciences

作者： Yang, Jun Jiang, Guancheng Huang, Shengming He, Yinbo Dong, Tengfei Yang, Lili China Univ Petr Coll Petr Engn Beijing Peoples R China Natl Engn Res Ctr Oil & Gas Drilling & Complet Te Beijing Peoples R China

ISBN: (纸本)9783031816758;9783031816734;9783031816727

The enzymes to alleviate polymer plugging is a time-honored and effective strategy in drilling, completion, hydraulic fracturing and enhanced recovery (EOR) operations. In this study, a temperature-tolerant alpha-amylase was characterized based on comprehensive characterizations. The HPLC and FTIR tests showed that alpha-amylase be consists of 17 amino acids, and the molecular chain contains a variety of functional groups such as -COOH and peptide bonding (-CO-NH-). The TGA and PSD experiments revealed that alpha-amylase has multiple weight loss temperatures and particle size intervals, with the most pronounced weight loss at 92 degrees C, and the charge was slightly biased towards the negative potential in the physiological environment of pH = 7. Rheological testing of the polymers showed that alpha-amylase was able to significantly degrade three common oilfield starch-based polymers, including carboxymethyl starch (CMS), hydroxypropyl starch (HPS), and heat-resistant modified starch (FLO), at temperatures above 90 degrees C. In addition, alpha-amylase can effectively eliminate polymer filter cake in non-solid and temporary plugging water-based drilling fluid systems, reducing viscosity by more than 60% and increasing filtration loss by 2 similar to 9 times. This study provides valuable insights and guidance for the use of bio-enzymes to mitigate reservoir damage and the advancement of microbial enzymes for enhanced recovery.

关键词： alpha-Amylase Amino acids Drilling fluid Polymer degradation Filter cake

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The Centrodes Relevance for the Kineto-Dynamic Analysis of the Parabolic Rigid-Body Motion 5th

The Centrodes Relevance for the Kineto-Dynamic Analysis of t...

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5th International Conference of International-Federation-for-the-Promotion-of-Mechanism-and-machine-science IFToMM ITALY (IFIT)

作者： Figliolini, Giorgio Lanni, Chiara Tomassi, Luciano Cavacece, Massimo Univ Cassino & South Latium Frosinone Italy

ISBN: (纸本)9783031645556;9783031645532;9783031645525

This paper is aimed to show the relevance of the centrodes for the kineto-dynamic analysis of the parabolic rigid-body motion in the vertical plane. In particular, the instant center of rotation and the acceleration pole are determined along with their corresponding vector fields. Consequently, the fixed and moving centrodes are achieved in order to reproduce and simulate the parabolic rigid-body motion by means of their pure-rolling contact. The inflection circle is also derived by kinematic properties only, since the acceleration pole coincides with the inflection pole, which is opposite to the instant center of rotation. A suitable algorithm has been formulated and validated by significant examples.

关键词： kineto-dynamic analysis vector fileds centrodes inflection circle

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A PK Platform Lab Test for a Brain Neurosurgery 6th

A PK Platform Lab Test for a Brain Neurosurgery

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6th Symposium on Mechanism Design for Robotics (MEDER)

作者： Silva-Garces, K. N. Russo, M. Torres-SanMiguel, C. R. Guerrero-Hernandez, L. A. Ceccarelli, M. Inst Politecn Nacl Unidad Zacatenco Escuela Super Ingn Mecan & Elect Secc Estudios Posgrad & Invest Mexico City 07738 DF Mexico Univ Roma Tor Vergata Dept Ind Engn Lab Robot Mechatron I-00133 Rome Italy

ISBN: (纸本)9783031673856;9783031673832;9783031673825

A platform for brain neurosurgery is presented with a prototype for lab testing. The platform is designed based on a parallel kinematic mechanism with a prototype 3D printed and assembly with commercial joints. It uses three linear actuators to reach the coordinates needed for the surgeon aids, the Inertial Measurement Unit (IMU), and current sensors for data acquisition. The platform is tested on two cases of study, five times each Case. The test simulates a surgery operation with the performance of two linear actuators at the same time, with pitch values of 5 degrees to -5 degrees and roll values between -20 degrees to -35 degrees.

关键词： Medical devices Brain Surgery Parallel Manipulators Prototype Testing

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The Interplay of Viscoelasticity and Friction in Thin Tape Peeling 5th

The Interplay of Viscoelasticity and Friction in Thin Tape P...

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5th International Tribology Symposium of IFToMM (ITS-IFToMM)

作者： Ceglie, Marco Menga, Nicola Carbone, Giuseppe Polytech Univ Bari Dept Mech Math & Management Bari Italy

ISBN: (纸本)9783031626180;9783031626166;9783031626159

Despite numerous experimental studies highlighting the potential occurrence of interfacial sliding during peeling processes, there is currently no model that takes into account the combined influence of tape viscoelasticity and frictional interfacial dissipation on global peeling behavior. In this study a theoretical analysis of the peeling of a thin viscoelastic tape from a rigid substrate is presented. Both stuck and sliding interfacial condition are considered. Results show that the presence of frictional dissipation leads to an enhanced adhesive performance of the system at small peeling angles compared to stuck model prediction, and that, in agreement with experimental evidences, the propagation velocity plays a key role in governing the global peeling behavior.

关键词： Peeling Adhesion Friction Viscoelasticity

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A Virtual Robotic Disassembly System for Retired Power Battery Pack 30th

A Virtual Robotic Disassembly System for Retired Power Batte...

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30th International Conference on Computational and Experimental Engineering and sciences

作者： Wu, Haijun Li, Yunhan Lou, Jingjing Jiang, Yuhang Guan, Minxiu Li, Huitao Huzhou Inst Zhejiang Univ Huzhou Peoples R China Huzhou Key Lab Green Energy Mat & Battery Cascade Huzhou Peoples R China Huzhou Coll Huzhou Peoples R China Yiwu Ind & Commercial Coll Yiwu Peoples R China

ISBN: (纸本)9783031816758;9783031816734;9783031816727

Taking the intelligent disassembly of retired power battery pack as the research object, a virtual robotic disassembly system is constructed. The system consists of a multi-robot collaborative disassembly workstation built based on ABB's virtual simulation platform-RobotStudio and external programs connected through its secondary development interface. In the workstation, robots are configured at the appropriate stations according to the disassembly process, and a variety of end-effector actuators are designed according to the characteristics of different disassembly targets. The motion of the peripheral devices is simulated by the Smart component, and the communication between the Smart component and the robot is realized by the workstation I/O signals and logic. The workstation is triggered by external signals through the secondary development interface, and the simulation of removing the screws, gripping the housing cover, and retrieving the battery module is completed by combining the functions of online path planning and adaptive and flexible gripping, so as to realize the flexible and collaborative battery pack disassembly operation and effectively improve the efficiency of the disassembly process. The system effectively improves the disassembly automation level and the disassembly efficiency of retired power battery packs, which is of certain significance for the development of intelligent disassembly equipment for retired power battery packs.

关键词： Retired Power Battery Pack Virtual Robotic Disassembly RobotSdudio Secondary Development

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Finite Element Analysis of Containment Structure Ultimate Bearing Capacity Under Internal Pressure 30th

Finite Element Analysis of Containment Structure Ultimate Be...

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30th International Conference on Computational and Experimental Engineering and sciences

作者： Mao, Minghui Zheng, Yuhan Chen, Yonghan Xu, Qiang Xu, Zhengyu Lan, Tianyu Mao, Jize Harbin Engn Univ Coll Aerosp & Civil Engn Harbin Peoples R China Gen Clean Energy Co Ltd Shanghai Peoples R China China Gen Nucl Power Design Co Ltd Shenzhen Shenzhen Peoples R China

ISBN: (纸本)9783031816758;9783031816734;9783031816727

This paper takes the containment structure as the research object, and carries out nonlinear finite element analysis by applying 0 similar to 2.5 times of design internal-pressure, the global nonlinear analysis on the 3D-solid containment model embedded with pre-stress tendons is performed under gravity and pre-stress loads. A prestressed containment structure model with complex spatial linear prestressed tendons is established precisely by using Concrete Damaged Plasticity (CDP) model and cooling method to simulate prestressed stress. In response to the failure predictions based on failure criteria, two phases of failure criteria in predicting the ultimate capacity of containment are proposed, including the functional failure and the structural failure. During the application of internal-pressure, the functional failure is determined by the damage degree of concrete, and the structural failure is determined by the yield of prestressed steel, providing a basis for the analysis and design of the containment structure.

关键词： Containment structure Post-tensioning structure Concrete damaged plasticity model Numerical analysis Internal-pressure failure

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