检索结果-南通市图书馆

Design,fabrication,and dynamic mechanical responses of fiber-reinforced composite lattice materials

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Mechanical System Dynamics 2023年第3期3卷 213-228页

作者： Jian Xiong Cheng Gong Qianqian Wu Li Ma Jinshui Yang Linzhi Wu Center for composite Materials and Structures Harbin Institute of TechnologyHarbinChina National Key Laboratory of Science and Technology on Advanced composites in Special Environments Harbin Institute of TechnologyHarbinChina

fiber-reinforced composites are a popular lightweight materials used in a variety of engineering applications,such as aerospace,architecture,automotive,and marine construction,due to their attractive mechanical *** lattice materials from fiber-reinforced composites is an efficient approach for developing ultra-lightweight structural systems with superior mechanical proper-ties and multifunctional *** contrast to corrugated,foam,and honeycomb core materials,composite lattice materials can be manufactured with various architectural designs,such as woven,grid,and truss ***,lattice materials with open-cell topology provide multifunctional advantages over conventional closed-cell honeycomb and foam structures and are thus highly desirable for developing aerospace systems,hypersonic vehicles,long-range rockets and missiles,ship and naval structures,and protective *** objective of this study is to review and analyze dynamic mechanical behavior performed by different researchers in the area of composite lattice materials and to highlight topics for future research.

关键词： fiber-reinforced composite lattice structures sandwich structures dynamic mechanical behavior

Dynamic crack growth in a fiber-reinforced composite plate

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science Bulletin 2005年第15期 31-35页

作者： LIU Kaixin, LIU Weifu, Zhang Jinxiang, LI Rong, ZHANG Guohua & FU Bin State Key Laboratory for Turbulence and Complex Systems and De-partment of Mechanics and Engineering Science, Peking University, 100871, China

This paper reports an experiment on the failure of a precracked plate made of unidirectional glass-epoxy fi-ber-reinforced composites subjected to three-point bending impact load. In the experiment, the whole process of crack growth was recorded by using high-speed photographic technique, in which a transmitted light path was adopted. Moreover, a new phenomenon of dynamic fracture has been observed. Based on the results, some preliminary studies have been carried out on the rate and path of the crack growth, as well as the failure mode.

关键词： orthotropic fiber-reinforced composite high-speed photography dynamic fracture.

From common biomass materials to high-performance tissue engineering scaffold: Biomimetic preparation, properties characterization, in vitro and in vivo evaluations

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Bioresources and Bioproducts 2024年第2期9卷 185-196页

作者： Zongpu Xu Fang He Jing Yu Zhangze Yang Yu Zhu Rong Liao Ruyin Lyu Mei Yang Liangjun Zhu Mingying Yang Institute of Applied Bioresources College of Animal SciencesZhejiang UniversityHangzhou 310058China Key Laboratory of Silkworm and Bee Resource Utilization and Innovation of Zhejiang Province Zhejiang UniversityHangzhou 310058China Department of Neurosurgery the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China

Converting common biomass materials to high-performance biomedical products could not only reduce the environmental pressure associated with the large-scale use of synthetic materials,but also increase the economic *** as a very promising candidate has drawn considerable attention owing to its abundant sources and remarkable ***,pure chitosan materials usually exhibit insufficient mechanical properties and excessive swelling ratio,which seriously affected their in vivo stability and integrity when applied as tissue engineering ***,simultaneously improving the mechanical strength and biological compatibility of pure chitosan(CS)scaffolds becomes very ***,inspired by the fiber-reinforced con-struction of natural extracellular matrix and the porous structure of cancellous bone,we built silk microfibers/chitosan composite scaffolds via ice-templating *** biomimetic strategy achieved 500%of mechanical improvement to pure chitosan,and meanwhile still maintaining high porosity(>87%).In addition,the increased roughness of chitosan pore walls by embedded silk microfibers significantly promoted cell adhesion and *** importantly,after subcutaneous implantation in mice for four weeks,the composite scaffold showed greater struc-tural integrity,as well as better collagenation,angiogenesis,and osteogenesis abilities,suggesting its great potential in biomedicine.

关键词： Chitosan Biomimetic strategy fiber-reinforced composite Mechanical property Biocompatibility

Prediction model for determining the optimum operational parameters in laser forming of fiber-reinforced composites

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Manufacturing 2020年第2期8卷 242-251页

作者： Annamaria Gisario Mehrshad Mehrpouya Atabak Rahimzadeh Andrea De Bartolomeis Massimiliano Barletta Department of Mechanical and Aerospace Engineering Sapienza University of RomeVia Eudossiana 1800184 RomeItaly Department of Mechanical and Industrial Engineering The University of Roma TreVia Vito Volterra 6200146 RomeItaly Department of Mechanical Engineering University of BathBath BA27AYUK

composite materials are widely employed in various industries,such as aerospace,automobile,and sports equipment,owing to their lightweight and strong structure in comparison with conventional materials.I aser material processing is a rapid technique for performing the various processes on composite *** particular,laser forming is a flexible and reliable approach for shaping fiber-metal laminates(FML.s),which are widely used in the aerospace industry due to several advantages,such as high strength and light *** this study,a prediction model was developed for determining the optimal laser parameters(power and speed)when forming FML *** neural networks(ANNs)were applied to estimate the process outputs(temperature and bending angle)as a result of the modeling *** this purpose,several ANN models were developed using various ***,the achieved results demonstrated the advantage of the models for predicting the optimal operational parameters.

关键词： Laser forming(LF) fiber-reinforced composite fiber-metal laminates(FMLs) Glass laminate aluminum reinforced epoxy(GLARE) Artificial neural networks(ANNs)

NUMERICAL SIMULATION OF 2D fiber-reinforced compositeS USING BOUNDARY ELEMENT METHOD

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2005年第11期26卷 1515-1522页

作者：孔凡忠郑小平姚振汉 HUANG Dun Department of Engineering Mechanics Tsinghua University Beijing 100084 P. R. China 不详

The boundary dement method was improved for the 2D elastic composites with randomly distributed inclusions. This problem can be reduced to a boundary integral equation for a multi-connected domain. Further, considering the matrices of the tractions and displacements for each group of the identical inclusion were the same, an effective computational scheme was designed, since the orders of the resulting matrix equations can be greatly reduced. Numerical examples indicate that this boundary element method scheme is more effective than the conventional multi-domain boundary element method for such a problem. The present scheme can be used to investigate the effective mechanical properties of the fiber-reinforced composites.

关键词： inclusion boundary element method 2D elasticity fiber-reinforced composite

INTERFACIAL DEBONDING OF COATED-fiber-reinforced compositeS UNDER TENSION-TENSION CYCLIC LOADING

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2000年第4期16卷 347-356页

作者：石志飞周利民 School of Civil Engineering Northern Jiaotong UniversityBeijing 100044China Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHong KongChina

A new degradation function of the friction coefficient is *** on the double shear-lag model and Paris formula,the interracial damage of coated- fiber-reinforced composites under tension-tension cyclic loading is *** effects of strength and thickness of the coating materials on the debond stress,debond rate as well as debond length are simulated.

关键词： interfacial debonding cyclic loading coating fiber-reinforced composite

ANALYTICAL SOLUTIONS FOR ELASTOSTATIC PROBLEMS OF PARTICLE-AND fiber-reinforced compositeS WITH INHOMOGENEOUS INTERPHASES

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2005年第3期26卷 336-344页

作者：段慧玲王建祥黄筑平黄红波 LTCS and Department of Mechanics and Engineering Science Peking UniversityBeijing 100871 P.R.China

By transforming the governing equations for displacement components into Riccati equations, analytical solutions for displacements, strains and stresses for Representive Volume Elements (RVEs) of particle_ and fiber_reinforced composites containing inhomo geneous interphases were obtained. The analytical solutions derived here are new and general for power_law variations of the elastic moduli of the inhomogeneous interphases. Given a power exponent, analytical expressions for the bulk moduli of the composites with inho mogeneous interphases can be obtained. By changing the power exponent and the coefficients of the power terms, the solutions derived here can be applied to inhomogeneous interphases with many different property profiles. The results show that the modulus variation and the thickness of the inhomogeneous interphase have great effect on the bulk moduli of the composites. The particle will exhibit a sort of “size effect”, if there is an interphase.

关键词： inhomogeneous interphase particle-reinforced composite fiber-reinforced composite analytical solution bulk modulus

Exact simulation for direction-dependent large elastic strain responses of soft fibre-reinforced composites

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2023年第9期44卷 1497-1510页

作者： Huifeng XI Guicheng ZHAO OBRUHNS Siyu WANG Heng XIAO School of Mechanics and Construction Engineering MOE Key Lab of Disaster Forecast and Control in EngineeringJinan UniversityGuangzhou 510632China Institute of Mechanics Ruhr-University BochumBochum D-44780Germany

An explicit form of the elastic strain-energy function for direction-dependent large elastic strain behaviors of soft fiber-reinforced composites is first presented based upon a decoupled approach for simulating complex nonlinear coupling *** this form,the exact closed-form solutions are then obtained for the uniaxial tension responses in the fiber and cross-fiber *** such exact solutions,the issue of simultaneously simulating strongly coupling nonlinear responses in the fiber and cross-fiber directions may be reduced to the issue of separately treating each decoupled uniaxial stress-strain response,thus bypassing usual complexities and uncertainties involved in identifying a large number of strongly coupled adjustable *** numerical examples given are in good agreement with the experimental data for large strain responses.

关键词： soft solid fiber-reinforced composite large elastic strain transverse isotropy strain-energy function logarithmic strain decoupling approach

A fiber-BRIDGING MODEL WITH STRESS GRADIENT EFFECTS

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2000年第2期16卷 164-172页

作者：孙毅李涛 Department of Space Technology and Mechanics Harbin Institute of Technology Harbin China 150001 LNM Institute of Mechanics Chinese Academy of Sciences Beijing China 100080

A fiber-bridging model with stress gradient effects is proposed for unidirectional fiber-reinforced composites. The stress gradient terms are introduced by solving a micromechanical model under a non-uniform stress loading. It is shown that the stress gradient effect is significant on both the fiber-bridging stress distribution and the value of the critical load of fiber failure.

关键词： micromechanics gradient theory fiber-reinforced composite