关闭×
Home
|
About Journal
|
Editorial Board
|
Instruction
|
Publication Ethics Statement
|
Subscriptions
|
Contacts Us
|
Chinese
Office Online
Submission Online
Peer Review
Editor Work
Editor-in-chief
Office Work
Journal Online
Accepted
Current Issue
Advanced Search
Archive
Read Articles
Download Articles
Email Alert
Quick Search
Adv Search
2020 Vol. 63, No. 22
Published: 2020-11-15
FEATURE
FORUM
RESEARCH
C0NTENTS
COVER STORY
APPROACHING SCIENCE
FEATURE
14
Study on Hybrid Fiber Composites Properties of Medium Temperature Curing Epoxy Resin Matrix
Wuyunqiqige,FU Yutong,GAO Xuhao,YAO Xuefeng
DOI: 10.16080/j.issn1671-833x.2020.22.014
In this paper, the mechanical properties of mid-temperature cured high toughness epoxy resin hybrid composites were investigated. Firstly, carbon fiber unidirectional prepreg, high-strength glass fiber unidirectional prepreg, and aramid fiber unidirectional prepreg were prepared by the hot-melt method, and a single prepreg layer and hybrid composites with different fibers were prepared by the autoclave method. Secondly, the tensile and compressive mechanical properties are tested and key performances such as stress-strain curve, strength, and stiffness were obtained. Finally, a theoretical model of equivalent tensile stiffness of hybrid fiber laminate composites was established and the Hashin strength criterion was introduced to evaluate the strength of the composites, the accuracy of which was verified by comparison with the measured values. The results showed that the interlayer mixing of different fiber prepregs allowed the hybrid composite to exert synergistic effects, optimize performance. The data obtained from the theoretical calculation model of the hybrid composite was close to the measured values, providing a theoretical basis for the strength design of the hybrid fiber.
2020 Vol. 63 (22): 14-22 [
Abstract
] (
196
)
HTML
New
PDF
(7103 KB) (
123
)
COVER STORY
24
A Review on Hot Tearing Models in Direct Chill Casting of Aluminum Alloys
CHEN Dongxu,WANG Junsheng, WANG Yu,ZHANG Mingshan,WANG Bing,ZHANG Chi,WANG Shuo,HAN Jiaqiang
DOI: 10.16080/j.issn1671-833x.2020.22.024
Aluminum alloys are widely used in aerospace, rail transportation, automobile lightweight and other fields. Semi-continuous direct cooling casting technology is an important method for preparing large aluminum alloy ingots. However, in this preparation process, hot tearing is a serious casting defect, and the control of hot tearing defects is a key technology for preparing high-quality large ingots. In this paper, the development overview of direct chill casting (DC casting), the formation mechanism and prediction model of hot tearing are summarized, and the calculation results of hot tearing susceptibility based on several hot tearing criterion are analyzed and compared with the casting practice. The results show that none of hot tearing criterion can quantitatively predict the occurrence of hot tearing. In terms of qualitative prediction, the RDG criterion has the greatest application potential. The future prospect of the integration of micro-macro theoretical calculations and advanced observation methods is proposed. When developing hot tearing criterion, multiphase mechanics, fracture mechanics, fluid flow and alloy thermodynamics should be linked, and the nucleation-expansionhealing complex mechanism in the three-dimensional pasty zone should be considered.
2020 Vol. 63 (22): 24-39 [
Abstract
] (
199
)
HTML
New
PDF
(5665 KB) (
455
)
FORUM
42
Application of Lasers in Additive Manufacturing
CHEN Jimin, ZHANG Chengyu
DOI: 10.16080/j.issn1671-833x.2020.22.042
In order to fully understand the influence of laser on additive manufacturing, the types of lasers widely used in additive manufacturing were reviewed, and important parameters related to additive manufacturing were analyzed for each type of laser. In addition, the advantages and limitations of each laser in additive manufacturing were inspected. For each additive manufacturing method, the latest progress of applicable lasers was introduced. The future of laser-based additive manufacturing was discussed at the end. Conclusion: CO2 and Nd:YAG lasers are still the backbone of various manufacturing technologies; Yb-fiber lasers have advantages such as higher average power, system stability, high parameter tunability, and low maintenance costs, and are gradually replacing Nd:YAG Lasers; although excimer lasers have relatively low beam quality and high cost, they can still be used for additive manufacturing that requires high-power UV laser beams; laser-based additive manufacturing must choose a laser source for additive manufacturing based on target performance.
2020 Vol. 63 (22): 42-53 [
Abstract
] (
139
)
HTML
New
PDF
(5982 KB) (
752
)
54
A Review of Microstructure and Mechanical Properties in Wire Arc Additive Manufactured Titanium Alloys
XIE Yong, WANG Fude,CONG Baoqiang,YAN Zhenyu,DONG Peng
DOI: 10.16080/j.issn1671-833x.2020.22.054
Wire arc additive manufacturing (WAAM) provides a new method for large titanium alloy components due to its low cost and short production cycle. In the present paper, the WAAM technologies was introduced briefly. Then the research progress in structure, tensile properties and fatigue crack growth of WAAMed Ti–6Al–4V was reviewed. The effects of constitutional cooling regulation (adding heterogeneous nucleation, controlling deposition parameters etc.), plastic deformation and heat treatment on structure and tensile properties was summarized. The effects of microstructure, fatigue crack growth path and residual stress on the behavior of fatigue crack growth was analyzed. Finally, the challenges of WAAMed Ti–6Al–4V were explained.
2020 Vol. 63 (22): 54-62 [
Abstract
] (
159
)
HTML
New
PDF
(56564 KB) (
161
)
63
Room and Elevated Temperature Tensile Properties of IN718 Alloy Fabricated by Selective Laser Melting
QIU Changyue, HE Bei, CHEN Haoxiu, TANG Haibo
DOI: 10.16080/j.issn1671-833x.2020.22.063
The IN718 alloys were fabricated by selective laser melting forming technique. The formation mechanism of solidi-fication structure and the behavior of phase transformation during heat treatment were investigated. The tensile fracture mechanism of IN718 alloy at room and high temperature after heat treatment was analyzed. The results show that the microstructure of sample is dendrite along building direction. Nanoscale Laves phase is distributed among the dendrites. The grain morphology has no obvious change after standard heat treatment. A large number of γ′, γ′′ and acicular δ phase dispersive precipitate. The content of Laves phase decreases and the hardness is about 40% higher than as-deposited samples. After heat treatment, the tensile strength of samples perpendicular to the building direction is higher than forgings. The plasticity of samples parallel to the building direction is better than forgings. The tensile strength is comparable to forgings at high temperature. The fracture mechanism of selective laser melted IN718 alloy after heat treatment is a through-granular ductile fracture mode of micropore aggregation.
2020 Vol. 63 (22): 63-69 [
Abstract
] (
268
)
HTML
New
PDF
(15060 KB) (
158
)
70
Design and Simulation of Support and Partition for SLM Forming of Aircraft Grid Parts
WANG Haoyu,RONG Peng,XU Weiwei,GAO Chuanyun,YU Wenjun,PANG Shengyong
DOI: 10.16080/j.issn1671-833x.2020.22.070
Grid part is a kind of key functional structure in a certain type of UAV. Grid Parts have complex shapes and high-precision control requirements, and are very suitable for laser selective melting (SLM) manufacturing. In this paper, the additive simulation software developed by Huazhong University of Science and Technology is used to simulate and analyze the SLM forming process of grid parts, and design and optimize the partition printing strategy of supports and key plastic deformation positions. The results show that the key plastic deformation positions in the SLM forming process can be quickly obtained through simulation, and the deformation of the key accumulation layer can be reduced by about 60% through the zone design; by comparing the simulation results after support removal with the test results, the deformation trend and the deformation value between two are in good agreement, the maximum deformation is in the middle grid area, and the deformation is about 2.0mm.
2020 Vol. 63 (22): 70-75 [
Abstract
] (
180
)
HTML
New
PDF
(11637 KB) (
123
)
APPROACHING SCIENCE
76
Based on Mechanical Engineering, Serve for Aeronautics and Astronautics
2020 Vol. 63 (22): 76-77 [
Abstract
] (
123
)
HTML
New
PDF
(1662 KB) (
143
)
RESEARCH
78
Influence of Interface Defect on High Cycle Fatigue Behaviour of Titanium Alloy Diffusion Bonding Joint
DENG Wujing, SHAO Jie, CHEN Wei,LI Zhiqiang, LI Xiaohua
DOI: 10.16080/j.issn1671-833x.2020.22.078
Joints of Ti–6Al–4V alloy with non-defect、ϕ2mm diameter、ϕ4mm diameter and penetrating defect were artificially fabricated by diffusion bonding (DB) process. The effects of interface defects on high-cycle fatigue properties of bonding joints are quantificationally investigated using the tension-compression fatigue tests (R=–1) while the defect plane is parallel to the load axis. Results indicate that the high cycle fatigue (HCF) limit of joints with non-defect and ϕ2mm diameter have simultaneously reached to 410MPa, while HCF limit of joints with penetrating defect alloy has fallen to 315MPa. Compared with other defect couples, joints with ϕ4mm DB defect shows a larger scatter of life that HCF strength doesn’t converge. Meanwhile defects have influenced on fatigue initiation location that fatigue crack of couples with nondefect mainly initiate from out-surface and fatigue crack of couples with penetrating defect mainly initiate from subsurface. Fatigue samples with ϕ4mm defect initiated surface exhibited longer fatigue life; While almost all samples with defect-induced crack initiation exhibited a much shorter fatigue life.
2020 Vol. 63 (22): 78-83 [
Abstract
] (
130
)
HTML
New
PDF
(20532 KB) (
85
)
84
An Industrial Robot Positioning Method Based on Guidance of Multi-Line Structured Light Vision
YU Jun,LI Shuanggao,LI Gen,ZHU Kui
DOI: 10.16080/j.issn1671-833x.2020.22.084
In order to realize the three-dimensional positioning function of the industrial robot to target objects with weak texture and no obvious positioning feature points, a multi-line structured light vision guided industrial robot positioning method is proposed and the positioning accuracy is analyzed experimentally. Multi-line structured light measurement module consisting of industrial camera and laser is used as the vision senor of the positioning system. Firstly, a multi-line structured light positioning feature points extraction algorithm based on corner detection is proposed, and the three-dimensional information of feature points is reconstructed by stereo vision principle. Secondly, the reconstructed positioning feature points are registered with the discrete points of the theoretical model, and combined with the calibration parameters, the relative poses of the end are solved. Finally, a closed-loop attitude control system based on pose feedback is established. Experimental results show that the proposed method has high positioning accuracy, and it can meet the requirements of industrial applications.
2020 Vol. 63 (22): 84-91 [
Abstract
] (
142
)
HTML
New
PDF
(14942 KB) (
658
)
92
Application of FRP Composite Tubes in Aerospace Field and Developments of Manufacturing Technology: A Review
WANG Qiaoling,WEI Dong,LI Guangjun,LI Heng,WEN Youyi
DOI: 10.16080/j.issn1671-833x.2020.22.092
The properties of the tube components are the significant factors affecting the reliability of aircraft. The rapid development of domestic large aircraft and military aircraft has put forward higher requirements for lightweight, high efficiency and high reliability of aircraft. The structure of integral multi bend and compact complex structure are the future development direction of the tube system. Composite materials have been widely used in aircraft because of their excellent comprehensive properties. The demands of high performance and lightweight integrated manufacturing of tubes used on aircraft can be satisfied by replacing metal tubes with fiber reinforced polymer (FRP) composite tubes. At present, FRP composite tubes have been gradually applied in a small amount of aircrafts and which have broad market prospects in the future. The manufacturing process of FRP composite tubes mainly involve the selection of materials, the selection of manufacturing process methods and equipment, and the optimization of process parameters, and each link plays a crucial role in the forming quality of the FRP composite tubes. In this paper, the global market and application of FRP tubes are introduced, and the comparison of performance between resin and fiber reinforced materials, as well as the manufacturing process characteristics of the commonly used FRP tubes are analyzed. On this basis, the development and the research status of filament winding technology in the manufacturing of FRP tubes in recent years are reviewed and the future development trend is prospected.
2020 Vol. 63 (22): 92-101 [
Abstract
] (
169
)
HTML
New
PDF
(13135 KB) (
113
)
Notices
·
'Aeronautical Manufacturing technology ' is included in EI database
·
China Science Citation Database (CSCD)
·
Chinese S&T Journal Citation Reports (CJCR)
·
World Journal Clout Index (WJCI) Report of Scientific and Technological Periodicals
·
Supported in China Science and Technology Journal Excellence Action Plan
·
Aeronautical Manufacturing Technology ranked No. 3 in Chinese S&T Journal Citation Reports (CJCR)
·
High Quality Sci-tech Journal Classification Catalogue in Aerospace Field （2023）
·
A Guide to the Core Journals of China (hosted by Peking University Library)
Download
Copyright Transfer Agreement
Links
AVIC Manufacturing Technology Institute
AVIC
Copyright © Editorial Board of Aeronautical Manufacturing Technology
Supported by:
Beijing Magtech
