|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Biodegradable magnesium barrier membrane used for guided bone regeneration in dental surgery显示文摘Barrier membranes are commonly used as part of the dental surgical technique guided bone regeneration(GBR)and are often made of resorbable collagen or non-resorbable materials such as PTFE.While collagen membranes do not provide sufficient mechanical protection of the covered bone defect,titanium reinforced membranes and non-resorbable membranes need to be removed in a second surgery.Thus,biodegradable GBR membranes made of pure magnesium might be an alternative.In this study a biodegradable pure magnesium(99.95%)membrane has been proven to have all of the necessary requirements for an optimal regenerative outcome from both a mechanical and biological perspective.After implantation,the magnesium membrane separates the regenerating bone from the overlying,faster proliferating soft tissue.During the initial healing period,the membrane maintained a barrier function and space provision,whilst retaining the positioning of the bone graft material within the defect space.As the magnesium metal corroded,it formed a salty corrosion layer and local gas cavities,both of which extended the functional lifespan of the membrane barrier capabilities.During the resorption of the magnesium metal and magnesium salts,it was observed that the membrane became surrounded and then replaced by new bone.After the membrane had completely resorbed,only healthy tissue remained.The in vivo performance study demonstrated that the magnesium membrane has a comparable healing response and tissue regeneration to that of a resorbable collagen membrane.Overall,the magnesium membrane demonstrated all of the ideal qualities for a barrier membrane used in GBR treatment. | Patrick Rider Zeljka Peric Kacarevic Akiva Elad Drazen Tadic Daniel Rothamel Gerrit Sauer Fabien Bornert Peter Windisch David Botond Hangyasi Balint Molnar Emely Bortel Bernhard Hesse Frank Witte | 2022 | Bioactive Materials2022，7，8： | 7 |
| 2 | Crystal Plasticity Finite Element Process Modeling for Hydro-forming Micro-tubular Components显示文摘Micro-tubes manufactured by hydro-forming techniques have now been widely used in medical and microelectronics applica- tions. One of the difficulties in forming such parts is the control of localized necking in the initial stages of the deformation/forming process. A lack of microstructural information causes conventional macro-mechanics finite element(FE) tools to break down when used to investigate the localized microstructure evolution and necking encountered in micro-forming. An effort has been made to create an integrated crystal plasticity finite element(CPFE) system that enables micro-forming process simulations to be carried out easily, with the important features in forming micro-parts captured by the model. Based on Voronoi tessellation and probability theory, a virtual GRAIN(VGRAIN) system is created for generating grains and grain boundaries for micro-materials. Numerical procedures are devel- oped to link the physical parameters of a material to the control variables in a Gamma distribution. A script interface is developed so that the virtual microstructure can be input to the commercial FE code, ABAQUS, for mesh generation. A simplified plane strain CPFE modeling technique is developed and used to capture localized thinning and failure features for hydro-forming of micro-tubes. Grains within the tube workpiece, their distributions and orientations are generated automatically by using the VGRAIN system. A set of crystal viscoplasticity constitutive equations are implemented in ABAQUS/Explicit by using the user-defined material subroutine, VUMAT. Lo- calized thinning is analyzed for different microstructures and deformation conditions of the material using the CPFE modeling technique. The research results show that locations of thinning in forming micro-tubes can be random, which are related to microstructure and grain orientations of the material. The proposed CPFE technique can be used to predict the locations of thinning in forming micro-tubes. | ZHUANG Weimin WANG Shiwen BALINT Daniel LIN Jianguo | 2011 | Chinese Journal of Mechanical Engineering2011，24，1： | 4 |
| 3 | Investigation of FE Model Size Definition for Surface Coating Application显示文摘An efficient prediction mechanical performance of coating structures has been a constant concern since the dawn of surface engineering. However, predictive models presented by initial research are normally based on traditional solid mechanics, and thus cannot predict coating performance accurately. Also, the high computational costs that originate from the exclusive structure of surface coating systems (a big difference in the order of coating and substrate) are not well addressed by these models. To fill the needs for accurate prediction and low computational costs, a multi-axial continuum damage mechanics (CDM)-based constitutive model is introduced for the investigation of the load bearing capacity and fracture properties of coatings. Material parameters within the proposed constitutive model are determined for a typical coating (TiN) and substrate (Cu) system. An efficient numerical subroutine is developed to implement the determined constitutive model into the commercial FE solver, ABAQUS, through the user-defined subroutine, VUMAT. By changing the geometrical sizes of FE models, a series of computations are carried out to investigate (1) loading features, (2) stress distributions, and (3) failure features of the coating system. The results show that there is a critical displacement corresponding to each FE model size, and only if the applied normal loading displacement is smaller than the critical displacement, a reasonable prediction can be achieved. Finally, a 3D map of the critical displacement is generated to provide guidance for users to determine an FE model with suitable geometrical size for surface coating simulations. This paper presents an effective modelling approach for the prediction of mechanical performance of surface coatings. | CHEN Yanhong ZHUANG Weimin WANG Shiwen LIN Jianguo BALINT Daniel SHAN Debin | 2012 | Chinese Journal of Mechanical Engineering2012，25，5： | 3 |
| 4 | Investigation of deformation and failure features in hot stamping of AA6082: Experimentation and modelling显示文摘 | Mohamed S. Mohamed Alistair D. Foster Jianguo Lin Daniel S. Balint Trevor A. Dean | 2011 | International Journal of Machine Tools and Manufacture2011，，1： | 2 |
| 5 | A controlled Poisson Voronoi tessellation for grain and cohesive boundary generation applied to crystal plasticity analysis显示文摘 | Pan Zhang Morad Karimpour Daniel Balint Jianguo Lin Didier Farrugia | 2012 | Computational Materials Science2012，，： | 1 |
| 6 | 轴流转桨式水轮机中两相空化流的数值模拟与分析显示文摘水轮机的空化流动以及空化发展对效率影响的研究通常通过试验来进行。而在开发新转轮的设计和优化当中,数值计算是非常重要的手段。本文提出了一种进行水力机械两相空化流计算的适用性强、可靠、精确的计算方法,尤其适用于轴流转桨式水轮机。通过气泡相体积分数的数值定量描述空化的发展状况。此数值只有通过数值计算才能获得,而且可以很方便地比较相同空化数下不同设计方案的空化性能。 | Daniel BALINT 王磊(译) 李任飞(校) | 2008 | 国外大电机2008，，2： | 0 |
| 7 | Biodegradable magnesium fixation screw for barrier membranes used in guided bone regeneration显示文摘An ideal fixation system for guided bone(GBR)regeneration in oral surgery must fulfil several criteria that includes the provision of adequate mechanical fixation,complete resorption when no longer needed,complete replacement by bone,as well as be biocompatible and have a good clinical manageability.For the first time,a biodegradable magnesium fixation screw made of the magnesium alloy WZM211 with a MgF2 coating has been designed and tested to fulfill these criteria.Adequate mechanical fixation was shown for the magnesium fixation screw in several benchtop tests that directly compared the magnesium fixation screw with an equivalent polymeric resorbable device.Results demonstrated slightly superior mechanical properties of the magnesium device in comparison to the polymeric device even after 4 weeks of degradation.Biocompatibility of the magnesium fixation screw was demonstrated in several in vitro and in vivo tests.Degradation of the magnesium screw was investigated in in vitro and in vivo tests,where it was found that the screw is resorbed slowly and completely after 52 weeks,providing adequate fixation in the early critical healing phase.Overall,the magnesium fixation screw demonstrates all of the key properties required for an ideal fixation screw of membranes used in guided bone regeneration(GBR)surgeries. | Zeljka Peric Kacarevic Patrick Rider Akiva Elad Drazen Tadic Daniel Rothamel Gerrit Sauer Fabien Bornert Peter Windisch David Botond Hangyasi Balint Molnar Till Kammerer Bernhard Hesse Emely Bortel Marco Bartosch Frank Witte | 2022 | Bioactive Materials2022，7，8： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员