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A Stoneley wave method to detect interlaminar damage of metal layer composite pipe
Bing LI,Lei QIANG,Tong LU,Xu GENG,Minghang LI
《机械工程前沿(英文)》 2015年 第10卷 第1期 页码 89-94 doi: 10.1007/s11465-015-0323-4
The interlaminar defect is a major form of damage in metal layer composite pipes which are widely used in petroleum and chemical industry. In this paper, a Stoneley wave method is presented to detect interlaminar damage in laminated pipe structure. Stoneley wave possesses some good characteristics, such as high energy and large displacement at the interface and non-dispersive in the high-frequency, so the sensitivity of detecting interlaminar damage can be improved and the higher frequency can be used in damage detection compared with Lamb waves. Additionally, as the frequency increases, the wavelength of the Stoneley wave reduces. Thus, its ability to detect small defects at the interface is enhanced. Finite element model of metal layer composite pipe with interlaminar damage is used to simulate wave propagation of Lamb waves and Stoneley wave, respectively. The damage location is calculated by using the Stoneley wave signal obtained from finite element model, and then the results are compared with the actual damage locations. The simulation examples demonstrate that the Stoneley wave method can better identify the interlaminar damage in laminated pipe structure compared with Lamb waves.
Free vibration analysis of laminated FG-CNT reinforced composite beams using finite element method
T. VO-DUY, V. HO-HUU, T. NGUYEN-THOI
《结构与土木工程前沿(英文)》 2019年 第13卷 第2期 页码 324-336 doi: 10.1007/s11709-018-0466-6
关键词: free vibration analysis laminated FG-CNTRC beam finite element method first-order shear deformation theory composite material
Major applications of heat pipe and its advances coupled with sorption system: a review
Yang YU, Guoliang AN, Liwei WANG
《能源前沿(英文)》 2019年 第13卷 第1期 页码 172-184 doi: 10.1007/s11708-019-0610-6
关键词: heat pipe sorption system heat transfer solid sorption heat pipe
Thermal buckling behavior of laminated composite plates: a finite-element study
Houdayfa OUNIS,Abdelouahab TATI,Adel BENCHABANE
《机械工程前沿(英文)》 2014年 第9卷 第1期 页码 41-49 doi: 10.1007/s11465-014-0284-z
In this paper, the thermal buckling behavior of composite laminated plates under a uniform temperature distribution is studied. A finite element of four nodes and 32 degrees of freedom (DOF), previously developed for the bending and mechanical buckling of laminated composite plates, is extended to investigate the thermal buckling behavior of laminated composite plates. Based upon the classical plate theory, the present finite element is a combination of a linear isoparametric membrane element and a high precision rectangular Hermitian element. The numerical implementation of the present finite element allowed the comparison of the numerical obtained results with results obtained from the literature: 1) with element of the same order, 2) the first order shear deformation theory, 3) the high order shear deformation theory and 4) the three-dimensional solution. It was found that the obtained results were very close to the reference results and the proposed element offers a good convergence speed. Furthermore, a parametrical study was also conducted to investigate the effect of the anisotropy of composite materials on the critical buckling temperature of laminated plates. The study showed that: 1) the critical buckling temperature generally decreases with the increasing of the modulus ratio EL/ET and thermal expansion ratio αT/αL, and 2) the boundary conditions and the orientation angles significantly affect the critical buckling temperature of laminated plates.
关键词: thermal buckling laminated composite plates anisotropy critical buckling temperature finite-element method high precision rectangular Hermitian element
Stochastic analysis of laminated composite plate considering stochastic homogenization problem
S. SAKATA,K. OKUDA,K. IKEDA
《结构与土木工程前沿(英文)》 2015年 第9卷 第2期 页码 141-153 doi: 10.1007/s11709-014-0286-2
关键词: stochastic homogenization multiscale stochastic analysis microscopic random variation laminated composite plate
Design and analyses of open-ended pipe piles in cohesionless soils
Yuan GUO,Xiong (Bill) YU
《结构与土木工程前沿(英文)》 2016年 第10卷 第1期 页码 22-29 doi: 10.1007/s11709-016-0314-5
Error compensation for tool-tip trace during cutting of laminated paper for rapid prototyping
Yucheng DING, Changhe LI, Dichen LI, Guoxin YU
《机械工程前沿(英文)》 2009年 第4卷 第2期 页码 111-119 doi: 10.1007/s11465-009-0020-2
关键词: rapid prototyping laminated object manufacturing knife-cutting tracing error
《结构与土木工程前沿(英文)》 页码 1357-1369 doi: 10.1007/s11709-023-0996-4
关键词: fiber orientation composite laminates stiffness degradation analytical approaches finite element analysis
Group-based multiple pipe routing method for aero-engine focusing on parallel layout
《机械工程前沿(英文)》 2021年 第16卷 第4期 页码 798-813 doi: 10.1007/s11465-021-0645-3
关键词: multiple pipe routing optimization algorithm aero-engine pipe grouping parallel layout
A review of nondestructive examination technology for polyethylene pipe in nuclear power plant
Jinyang ZHENG, Yue ZHANG, Dongsheng HOU, Yinkang QIN, Weican GUO, Chuck ZHANG, Jianfeng SHI
《机械工程前沿(英文)》 2018年 第13卷 第4期 页码 535-545 doi: 10.1007/s11465-018-0515-9
Polyethylene (PE) pipe, particularly high-density polyethylene (HDPE) pipe, has been successfully utilized to transport cooling water for both non-safety- and safety-related applications in nuclear power plant (NPP). Though ASME Code Case N755, which is the first code case related to NPP HDPE pipe, requires a thorough nondestructive examination (NDE) of HDPE joints. However, no executable regulations presently exist because of the lack of a feasible NDE technique for HDPE pipe in NPP. This work presents a review of current developments in NDE technology for both HDPE pipe in NPP with a diameter of less than 400 mm and that of a larger size. For the former category, phased array ultrasonic technique is proven effective for inspecting typical defects in HDPE pipe, and is thus used in Chinese national standards GB/T 29460 and GB/T 29461. A defect-recognition technique is developed based on pattern recognition, and a safety assessment principle is summa-rized from the database of destructive testing. On the other hand, recent research and practical studies reveal that in current ultrasonic-inspection technology, the absence of effective ultrasonic inspection for large size was lack of consideration of the viscoelasticity effect of PE on acoustic wave propagation in current ultrasonic inspection techno-logy. Furthermore, main technical problems were analyzed in the paper to achieve an effective ultrasonic test method in accordance to the safety and efficiency requirements of related regulations and standards. Finally, the development trend and challenges of NDE test technology for HDPE in NPP are discussed.
关键词: polyethylene pipe nuclear power plant ultrasonic inspection nondestructive testing safety assessment
Calculation method of load distribution on pipe threaded connections under tension load
Shoujun CHEN, Lianxin GAO, Qi AN
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 241-248 doi: 10.1007/s11465-011-0219-x
This paper presents a new calculation method that can calculate the load distribution on pipe threaded connections under tension load. On the basis of elastic mechanics, the new method was developed by analyzing each thread tooth, and a new deformation and covariant equation by making a mechanics analysis on each thread tooth was obtained. Compared with the traditional method proposed by the previous references, the new deformation and covariant equation could be used to describe the relation between the previous and the next thread tooth. By applying the new method on the sample of P-110S pipe threaded connection, the obtained results show that the load on thread tooth mainly concentrates on the four or five threads engaged and the middle teeth were not utilized well to bear the loads. The model offers a new way to calculate the loads carried on the thread teeth under tension load.
关键词: load distribution calculation method pipe threaded connections tension load
NC flame pipe cutting machine tool based on open architecture CNC system
Xiaogen NIE, Yanbing LIU
《机械工程前沿(英文)》 2009年 第4卷 第2期 页码 147-152 doi: 10.1007/s11465-009-0025-x
关键词: flame pipe cutting flame incision tracks CNC open architecture CNC system
Branch-pipe-routing approach for ships using improved genetic algorithm
Haiteng SUI,Wentie NIU
《机械工程前沿(英文)》 2016年 第11卷 第3期 页码 316-323 doi: 10.1007/s11465-016-0384-z
Branch-pipe routing plays fundamental and critical roles in ship-pipe design. The branch-pipe-routing problem is a complex combinatorial optimization problem and is thus difficult to solve when depending only on human experts. A modified genetic-algorithm-based approach is proposed in this paper to solve this problem. The simplified layout space is first divided into three-dimensional (3D) grids to build its mathematical model. Branch pipes in layout space are regarded as a combination of several two-point pipes, and the pipe route between two connection points is generated using an improved maze algorithm. The coding of branch pipes is then defined, and the genetic operators are devised, especially the complete crossover strategy that greatly accelerates the convergence speed. Finally, simulation tests demonstrate the performance of proposed method.
关键词: branch pipe ship industry piping system optimization algorithm
Assessment of glass fiber-reinforced polyester pipe powder in soil improvement
《结构与土木工程前沿(英文)》 2021年 第15卷 第3期 页码 742-753 doi: 10.1007/s11709-021-0732-x
关键词: shallow foundation sandy soil bearing capacity soil improvement pipe powder
Dynamic prediction of moving trajectory in pipe jacking: GRU-based deep learning framework
《结构与土木工程前沿(英文)》 页码 994-1010 doi: 10.1007/s11709-023-0942-5
关键词: dynamic prediction moving trajectory pipe jacking GRU deep learning
标题 作者 时间 类型 操作
A Stoneley wave method to detect interlaminar damage of metal layer composite pipe
Bing LI,Lei QIANG,Tong LU,Xu GENG,Minghang LI
期刊论文
Free vibration analysis of laminated FG-CNT reinforced composite beams using finite element method
T. VO-DUY, V. HO-HUU, T. NGUYEN-THOI
期刊论文
Major applications of heat pipe and its advances coupled with sorption system: a review
Yang YU, Guoliang AN, Liwei WANG
期刊论文
Thermal buckling behavior of laminated composite plates: a finite-element study
Houdayfa OUNIS,Abdelouahab TATI,Adel BENCHABANE
期刊论文
Stochastic analysis of laminated composite plate considering stochastic homogenization problem
S. SAKATA,K. OKUDA,K. IKEDA
期刊论文
Error compensation for tool-tip trace during cutting of laminated paper for rapid prototyping
Yucheng DING, Changhe LI, Dichen LI, Guoxin YU
期刊论文
Optimization of the mechanical performance and damage failure characteristics of laminated composites
期刊论文
A review of nondestructive examination technology for polyethylene pipe in nuclear power plant
Jinyang ZHENG, Yue ZHANG, Dongsheng HOU, Yinkang QIN, Weican GUO, Chuck ZHANG, Jianfeng SHI
期刊论文
Calculation method of load distribution on pipe threaded connections under tension load
Shoujun CHEN, Lianxin GAO, Qi AN
期刊论文
NC flame pipe cutting machine tool based on open architecture CNC system
Xiaogen NIE, Yanbing LIU
期刊论文