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Effect of wire diameter compression ratio on drawing deformation of micro copper wire
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作者 Tao HUANG Han-jiang WU +3 位作者 Ke-xing SONG Yan-min ZHANG Yan-jun ZHOU Shao-lin LI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2024年第8期2605-2618,共14页
A crystal plasticity finite element model was developed for the drawing deformation of pure copper micro wire,based on rate-dependent crystal plasticity theory.The impact of wire diameter compression ratio on the micr... A crystal plasticity finite element model was developed for the drawing deformation of pure copper micro wire,based on rate-dependent crystal plasticity theory.The impact of wire diameter compression ratio on the micro-mechanical deformation behavior during the wire drawing process was investigated.Results indicate that the internal deformation and slip of the drawn wire are unevenly distributed,forming distinct slip and non-slip zones.Additionally,horizontal strain concentration bands develop within the drawn wire.As the wire diameter compression ratio increases,the strength of the slip systems and the extent of slip zones inside the deformation zone also increase.However,the fluctuating stress state,induced by contact pressure and frictional stress,results in a rough and uneven wire surface and diminishes the stability of the drawing process. 展开更多
关键词 micro copper wire drawing deformation crystal plasticity finite element slip mode
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Modeling asymmetric fracture mechanics of Mg alloy wire in drawing process
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作者 Sunghoon Choi Jongwon Shin +1 位作者 Joung Sik Suh Dongchoul Kim 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2024年第5期2057-2069,共13页
In this study,a numerical analysis was conducted on the ductile fracture of a 2-mm diameter Mg-1Zn-0.5Mn-0.5Sr-0.1Ca alloy wire during drawing.The hexagonally close-packed crystal structure of Mg alloys causes asymmet... In this study,a numerical analysis was conducted on the ductile fracture of a 2-mm diameter Mg-1Zn-0.5Mn-0.5Sr-0.1Ca alloy wire during drawing.The hexagonally close-packed crystal structure of Mg alloys causes asymmetric fracture behavior,especially in the compression region.The aim of this study is to develop a comprehensive damage model for Mg alloy wire that accurately predicts ductile fracture,with a focus on the compression region.A novel experimental method was introduced to measure the ductile fracture of Mg alloy wires under different stress states.The wire drawing process was simulated using the Generalized Incremental Stress-State dependent damage(GISSMO)Model and the Semi-Analytical Model for Polymers(SAMP)model.The damage model's prediction and the experimental results were found to be in excellent agreement,especially in determining crack initiation.Computational analysis established a safe zone diagram for die angle and reduction ratio,and experimental validation confirmed the feasibility of this approach.The proposed damage model can provide a practical and reliable analysis for optimizing the drawing process of Mg alloy wire. 展开更多
关键词 Mg alloy Wire drawing Finite element method Damage model Safe zone diagram
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Research on the Reform of the Course“Reading of Concrete Structure Plan and Construction Drawings”Under the Background of“Promoting Teaching and Learning Through Competitions”
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作者 Guixiang Yu Xiaolong Tan 《Journal of Architectural Research and Development》 2023年第4期32-38,共7页
The inherent teaching approach can no longer meet the demands of society.In this paper,current issues within the teaching landscape of architectural engineering technology in higher vocational colleges as well as the ... The inherent teaching approach can no longer meet the demands of society.In this paper,current issues within the teaching landscape of architectural engineering technology in higher vocational colleges as well as the policies and teaching demands that formed the basis of this model were analyzed.The study shows the importance of the implementation of the teaching model“promoting teaching and learning through competitions.”This model puts emphasis on the curriculum and teaching resources,while also integrating the teaching process and evaluation with competition.These efforts aim to drive education reform in order to better align with the objectives of vocational education personnel training,while also acting as a reference for similar courses. 展开更多
关键词 Promoting teaching through competitions Promoting learning through competitions Reading of concrete structure plan method construction drawings Course reform
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基于知识结构差异的CorelDRAW服装设计课程改革与实践
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作者 邓喜洪 《西部皮革》 2024年第17期68-70,共3页
文章分析了“新文科”建设内涵,基于海口经济学院南海美术学院2021级服装与服饰设计专业学生的知识结构差异,对Corel DRAW服装设计课程教学方法、教学思路、考核方式等进行改革,优化教学设计,将海南地域文化、时尚创意思维融入课程内容... 文章分析了“新文科”建设内涵,基于海口经济学院南海美术学院2021级服装与服饰设计专业学生的知识结构差异,对Corel DRAW服装设计课程教学方法、教学思路、考核方式等进行改革,优化教学设计,将海南地域文化、时尚创意思维融入课程内容,以项目伴随式、任务驱动式等方法开展教学,结课作业和服装设计大赛相结合,全面激发学生的思想内核和学习动力,取得了诸多教学成果,为设计类专业软件课程改革提供了新思路。 展开更多
关键词 新文科 知识结构差异 Corel draw服装设计 课程改革
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工程图协同审议与存档管理系统VHDrawings的设计与实现 被引量:3
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作者 许列飞 赵宏俊 +1 位作者 匡海峰 蔡士杰 《计算机工程与应用》 CSCD 北大核心 2003年第23期210-213,共4页
工程设计单位的审图工作是一个需要多人参与、多次往复的过程。用传统的方法传递设计图与修改意见,速度慢且易出错,限制了工程设计单位工作效率的提高。该文介绍了一个计算机辅助的工程图协同审议与存档管理系统VHDrawings的设计与实现... 工程设计单位的审图工作是一个需要多人参与、多次往复的过程。用传统的方法传递设计图与修改意见,速度慢且易出错,限制了工程设计单位工作效率的提高。该文介绍了一个计算机辅助的工程图协同审议与存档管理系统VHDrawings的设计与实现。着重讨论了协同审图工作流的管理以及工程图自动识别技术在图档管理中的应用。为设计单位提高工作效率、优化管理流程提供了一种参考。 展开更多
关键词 计算机支持协同工作(CSCW) 工作流管理 图档管理 异步交互 同步交互
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eDrawings在《工程制图》多媒体课件中的应用 被引量:5
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作者 陈光霞 《现代机械》 2010年第1期53-54,75,共3页
分析了在《工程制图》多媒体课件中使用AutoCAD和SolidWorks两种软件时存在的不足,阐述了eDrawings在课件中的应用优势。论述了CAD二维图形和SolidWorks三维模型转换成eDrawings文件的方法、常见问题、问题产生的原因和解决方法。给出... 分析了在《工程制图》多媒体课件中使用AutoCAD和SolidWorks两种软件时存在的不足,阐述了eDrawings在课件中的应用优势。论述了CAD二维图形和SolidWorks三维模型转换成eDrawings文件的方法、常见问题、问题产生的原因和解决方法。给出了应用实例。 展开更多
关键词 工程制图 Edrawings AUTOCAD SOLIDWORKS 多媒体课件
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Automated Dimensioning Method of Engineering Drawings for Mechanical Products Based on Curve Chain 被引量:1
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作者 Gui Li Peng Yang 《Computers, Materials & Continua》 SCIE EI 2020年第10期847-863,共17页
An automated method based on the curve chain was proposed for dimensioning of engineering drawings for the mechanical products.According to the internal relation between the features of 3D model feature and elements o... An automated method based on the curve chain was proposed for dimensioning of engineering drawings for the mechanical products.According to the internal relation between the features of 3D model feature and elements of 2D drawing,the curve chain was established to reflect the geometric topological structure between the elements.It divides the dimensions into the absolute dimensions within the cure chain and the relative dimensions between the curve chains.The parallel and lengthy relationship between the drawing elements of the constructed X and Y parallel matrix was solved to remove redundant elements in the curve chain and labeled the absolute dimensions of the remaining valid elements.The average minimum weight coefficient was introduced to judge the dependence on the relative dimensions between curve chains.Through the analysis of the overlap between the circular rectangular areas,including all the absolute dimensions of the curve chains,overlapping curve chains were merged,and their dimensions were rearranged to avoid the cross interference between them.The method was seamlessly integrated into the drafting module of product design software NX,and it developed an automated dimensioning system.The examples show that the system has excellent interactivity and robustness in the dimensioning of product engineering drawings.The dimension information is complete,accurate and reliable. 展开更多
关键词 Automated dimensioning engineering drawing curve chain mechanical product weight coefficient
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Labeling Line Drawings with Hidden-Part-Drawn of Planar Object with Trihedral Vertices 被引量:1
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作者 GAO Man-tun CAI Xu-peng 《Computer Aided Drafting,Design and Manufacturing》 2015年第2期1-13,共13页
Although line drawings consist of only line segments on a plane, they convey much information about the three-dimensional object structures. For a computer interpreting line drawings, some intelligent mechanism is req... Although line drawings consist of only line segments on a plane, they convey much information about the three-dimensional object structures. For a computer interpreting line drawings, some intelligent mechanism is required to extract three-dimensional information from the two-dimensional line drawings. In this paper, a new labeling theory and method are proposed for the two-dimensional line drawing with hidden-part-draw of a three-dimensional planar object with trihedral vertices. Some rules for labeling line drawing are established. There are 24 kinds of possible junctions for line drawing with hidden-part-draw, in which there are 8 possible Y and 16 W junctions. The three problems are solved that Sugihara's line drawing labeling technique exists. By analyzing the projections of the holes in manifold planar object, we have put forward a labeling method for the line drawing. Our labeling theory and method can discriminate between correct and incorrect hidden-part-draw natural line drawings. The hidden-part-draw natural line drawings can be labeled correctly by our labeling theory and method, whereas the labeling theory of Sugihara can only label the hidden-part-draw unnatural line drawings in which some visible lines must be drawn as hidden lines, and some invisible lines must be drawn as continuous lines. 展开更多
关键词 image understanding line drawing LABELING JUNCTION line drawing with hidden-part-drawn planar object
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3D object reconstruction by point coordinates of 2D line drawings 被引量:1
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作者 HAO Wuqiang DONG Lijun 《Computer Aided Drafting,Design and Manufacturing》 2013年第1期32-35,共4页
It is a research subject in computer vision to 3D reconstruction of an object represented by a single 2D line drawing. Previous works on 3D reconstruction from 2D line drawings focus on objects with lines, plane, view... It is a research subject in computer vision to 3D reconstruction of an object represented by a single 2D line drawing. Previous works on 3D reconstruction from 2D line drawings focus on objects with lines, plane, view, and so on. This paper mainly studies the 3D reconstruction from 2D line drawings. Besides, a new approach is proposed: it is that for the research of the point coordinates of 2D line drawings, so as to achieve the object reconstruction by the reconstruction of point coordinates. The reconstruction process includes: (1) the collection of point coordinates (X,Y) of 2D line drawings; (2) the derivation of mathematical formula about the reconstruction of the point of 2D line drawings, and calculating the corresponding point of the 3D coordinates; (3) the regeneration of 3D graphics with 3D points; (4) analyze error by the proportional of parallel of axonometric projection, in order to prove the accuracy of the method. 展开更多
关键词 2D line drawings point coordinates 3D reconstruction
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Direct Creation of Construction Drawings for Kwan-yin Statue by Close-Range Photogrammetry
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作者 FENG Wenhao LI Xin JIANG Wanshou GAO Xinqiaoprofessor,Ph.D supervisor,School of Remote Sensing and Information Engineering,Wuhan University,129 Luoyu Road,Wuhan 430079,China. 《Geo-Spatial Information Science》 2002年第3期58-64,共7页
In order to provide the model point accuracy of ±2 mm,an extra high accuracy industrial control net with four surveying piers with accuracy ±0.1 mm was set up around the model.Tens of orientation marks have ... In order to provide the model point accuracy of ±2 mm,an extra high accuracy industrial control net with four surveying piers with accuracy ±0.1 mm was set up around the model.Tens of orientation marks have been placed on the different parts and measured with accuracy ±0.2 mm from the above_mentioned piers.The main four stereopairs taken with the P31 camera around the model are simultaneously processed on the BC2 analytical plotter.The accuracy of absolute orientation is better than ±0.9 mm.Finally,about 300 sections construction drawings have been directly offered,and the close_range photogrammetric data has been used for the design and construction of the statue. 展开更多
关键词 closerange PHOTOGRAMMETRY Kwanyin STATUE construction drawING industrial control NET high ACCURACY
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Prediction of mechanical properties for deep drawing steel by deep learning 被引量:2
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作者 Gang Xu Jinshan He +2 位作者 Zhimin Lü Min Li Jinwu Xu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2023年第1期156-165,共10页
At present,iron and steel enterprises mainly use“after spot test ward”to control final product quality.However,it is impossible to realize on-line quality predetermining for all products by this traditional approach... At present,iron and steel enterprises mainly use“after spot test ward”to control final product quality.However,it is impossible to realize on-line quality predetermining for all products by this traditional approach,hence claims and returns often occur,resulting in major eco-nomic losses of enterprises.In order to realize the on-line quality predetermining for steel products during manufacturing process,the predic-tion models of mechanical properties based on deep learning have been proposed in this work.First,the mechanical properties of deep drawing steels were predicted by using LSTM(long short team memory),GRU(gated recurrent unit)network,and GPR(Gaussian process regression)model,and prediction accuracy and learning efficiency for different models were also discussed.Then,on-line re-learning methods for transfer learning models and model parameters were proposed.The experimental results show that not only the prediction accuracy of optimized trans-fer learning models has been improved,but also predetermining time was shortened to meet real time requirements of on-line property prede-termining.The industrial production data of interstitial-free(IF)steel was used to demonstrate that R2 value of GRU model in training stage reaches more than 0.99,and R2 value in testing stage is more than 0.96. 展开更多
关键词 machine learning recurrent natural network transfer learning on-line prediction deep drawing steel mechanical properties
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Expression of pain and distress in children during dental extractions through drawings as a projective measure: A clinical study
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作者 Sai Priya Pala Sivakumar Nuvvula Rekhalakshmi Kamatham 《World Journal of Clinical Pediatrics》 2016年第1期102-111,共10页
AIM: To evaluate the efficacy of drawings as a projective measure of pain and distress in children undergoing dental extractions.METHODS: Children in the age range of 4-13 years with existence of untreatable caries or... AIM: To evaluate the efficacy of drawings as a projective measure of pain and distress in children undergoing dental extractions.METHODS: Children in the age range of 4-13 years with existence of untreatable caries or over-retained primary teeth, indicated for extractions were included. Pain was assessed using one behavioral, faces, legs, activity, cry and consolability(FLACC) scale; and a self report measure; faces pain scale-revised(FPS-R), at two points of time, after completion of local anesthetic administration and after extraction. The general behavior of children was assessed with Wright's modification of Frankl rating scale. At the end of the session, children were instructed to represent, themselves along with the dentist and their experiences of the dental treatment through drawing. The drawings were scored utilizing Child drawing: Hospital scale(CD: H) manual and correlated with FLACC, FPS-R and Frankl using Pearson correlation test.RESULTS: A positive correlation, though statistically not significant, was observed between CD: H scores and all other considered parameters(Frankl, FPS-R and FLACC) in the present study.CONCLUSION: Drawings could not act as surrogate measure of child's pain; however, they acted as a narrative of his/her experiences and reflection of inner emotions. Hence, drawings can be used as an additional dental armamentarium. 展开更多
关键词 ANXIETY CHILD DISTRESS drawings PAIN
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Software Development for the Management of CAD Drawings 被引量:1
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作者 GAO Sande HUANG Loulin 《Computer Aided Drafting,Design and Manufacturing》 2015年第4期39-43,共5页
A software for the management of computer aided design(CAD) drawings was developed. It can be used to classify and register information including geometric features of the drawings, and to search appropriate referen... A software for the management of computer aided design(CAD) drawings was developed. It can be used to classify and register information including geometric features of the drawings, and to search appropriate reference drawings matching the given conditions of a new design. The thumbnails of the drawings can be displayed in an order of preference and can be used to zoom and access the PDF file or CAD data of a selected drawing. The thumbnails and the data structure are two key elements of the software. 展开更多
关键词 CAD management of drawings digital image processing software development
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Beijing 2022 in My Drawings
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作者 ZHENG JINWU 《China Today》 2022年第1期58-59,共2页
The Winter Olympic Games from European children’s perspectives.WITH only 100 days left to the opening ceremony of the Beijing 2022 Olympic and Paralympic Winter Games(Beijing 2022),an exhibition of hand-written poste... The Winter Olympic Games from European children’s perspectives.WITH only 100 days left to the opening ceremony of the Beijing 2022 Olympic and Paralympic Winter Games(Beijing 2022),an exhibition of hand-written posters selected from the“Draw Beijing 2022 Winter Olympics&Learn Chinese”activity kicked off online. 展开更多
关键词 drawING WINTER EXHIBITION
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Unfolded Drawings and Views for Irregular Spiral Surface Given Boundary Equations Based on CAD
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作者 SONG Yan ZHANG Meng SONG Juan 《Computer Aided Drafting,Design and Manufacturing》 2011年第1期18-21,共4页
Taking spiral chute as example, a method of unfolded drawings and views about irregular spiral surface is introduced. The surface is undevelopable and too complicated to get its views or to draw unfolded drawings by m... Taking spiral chute as example, a method of unfolded drawings and views about irregular spiral surface is introduced. The surface is undevelopable and too complicated to get its views or to draw unfolded drawings by manual method. In this article, a series of the boundary equations of the spiral chute are derived by the movement rule of coal flow, and the solid and views of the spiral chute are generated based on redevelopment of SolidWorks. Unfolded drawing is drawn applying triangular development principle. The views and unfolded drawings not only are produced automatically, precisely and parameterized, but also involve more technological information. So it has an important significance on the irregular spiral surface's developments and processing. 展开更多
关键词 unfolded drawings boundary equation redevelopment of CAD triangulardevelopment principle
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Raster to Vector Conversion for Engineering Drawings:Survey and Prospect
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作者 CHENG Bin ZHANG Shu-sheng +1 位作者 SHI Yun-fei LEI Guang-ming 《Computer Aided Drafting,Design and Manufacturing》 2006年第2期71-77,共7页
Recent development and recognition methods of raster to vector conversion for engineering drawings are presented. The advantages and disadvantages of all existing models are analyzed. Some research challenges and futu... Recent development and recognition methods of raster to vector conversion for engineering drawings are presented. The advantages and disadvantages of all existing models are analyzed. Some research challenges and future directions are discussed. 展开更多
关键词 raster to vector conversion graphic recognition engineering drawings VECTORIZATION
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3D reconstruction of complex curved objects from line drawings
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作者 Sun Yanling Dong Lijun 《Computer Aided Drafting,Design and Manufacturing》 2016年第2期13-17,共5页
An active research topic in computer vision and graphics is developing algorithms that can reconstruct the 3D surface of curved objects from line drawings. There are a number of algorithms have been dedicated to solve... An active research topic in computer vision and graphics is developing algorithms that can reconstruct the 3D surface of curved objects from line drawings. There are a number of algorithms have been dedicated to solve this problem, but they can't solve this problem when the geometric structure of a curved object becomes complex. This paper proposes a novel approach to reconstructing a complex curved 3D object from single 2D line drawings. Our approach has three steps: (1) decomposing a complex line drawing into several simpler line drawings and transforming them into polyhedron; (2) reconstructing the 3D wireframe of curved object from these simpler line drawings and generating the curved faces; (3) combining the 3D objects into the complete objects. A number of examples are given to demonstrate the ability of our approach to successfully perform reconstruction of curved objects which are more complex than previous methods. 展开更多
关键词 3D reconstruction line drawings complex curved objects
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An approach for converting orthographic projection drawings into 3D-CAD models
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作者 Gao Sande Huang Loulin 《Computer Aided Drafting,Design and Manufacturing》 2016年第3期39-43,共5页
Abstract: Hand drawings and two dimensional (2D) CAD drawings have been replaced by three dimensional (3D) CAD models in mechanical design, but some 2D drawings produced before are needed in the new design. Howev... Abstract: Hand drawings and two dimensional (2D) CAD drawings have been replaced by three dimensional (3D) CAD models in mechanical design, but some 2D drawings produced before are needed in the new design. However, the techniques and software packages for automatically converting 2D drawings into 3D-CAD models with high precision have not yet been developed due to the difficulties to verify the validity of the drawings, to decide the hidden lines and eoncavo-convex faces, and to represent free-form surfaces. In addition, it is very time consuming to manually convert a large number of 2D drawings into 3D CAD models. To address these problems, we propose an approach for converting 2D drawings into 3D-CAD models automatically. 展开更多
关键词 2D drawing DXF image recognition 3D-CAD model B-REP data structure
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3D Reconstruction from 2D Line Drawings only with Visible Vertices and Edges
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作者 WANG Xuan DONG Lijun 《Computer Aided Drafting,Design and Manufacturing》 2014年第1期42-45,共4页
The human vision system can reconstruct a 3D object easily from single 2D line drawings even if the hidden lines of the object are invisible. Now, there are many methods have emulated this ability, but when the hidden... The human vision system can reconstruct a 3D object easily from single 2D line drawings even if the hidden lines of the object are invisible. Now, there are many methods have emulated this ability, but when the hidden lines of the object are invisible, these methods cannot reconstruct a complete 3D object. Therefore, we put forward a new algorithm to settle this hard problem. Our approach consists of two steps: (1) infer the invisible vertices and edges to complete the line drawing, (2) propose a vertex-based optimization method to reconstruct a 3D object. 展开更多
关键词 3D reconstruction 2D line drawings hidden topology
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Parametric Drawing of Bearing Engineering Drawings based on Auto LISP
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作者 CHEN Xinhao WEN Hong WEI Yi 《International Journal of Plant Engineering and Management》 2020年第3期163-170,共8页
As the secondary development language of Auto CAD,Auto LISP is widely used in the standard rendering of various complex graphics.This method uses Auto LISP as a tool to select and draw three common bearings according ... As the secondary development language of Auto CAD,Auto LISP is widely used in the standard rendering of various complex graphics.This method uses Auto LISP as a tool to select and draw three common bearings according to the matched spindles.This paper describes the key steps of bearing parametric drawing and implementation process in detail.This developed program simplifies the drawing process,reduces the repetitive work in the design,and improves the efficiency of drawing. 展开更多
关键词 Auto CAD Auto LISP BEARING parametric drawing
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