Mechanical characteristics of functionally graded biodegradable implants for skull bone reconstruction

2006 ◽  
Vol 37 (6) ◽  
pp. 413-415 ◽  
Author(s):  
M. Wehmöller ◽  
K. Neuking ◽  
M. Epple ◽  
T. Annen ◽  
H. Eufinger
Keyword(s):  
Mechanical Characteristics ◽  
Functionally Graded ◽  
Biodegradable Implants ◽  
Bone Reconstruction ◽  
Skull Bone

Skull bone reconstruction after hemicraniectomy with a prefabricated implant

2003 ◽  
Vol 1256 ◽  
pp. 716-719
Author(s):  
H Eufinger ◽  
M Scholz ◽  
K Schmieder ◽  
S Weihe ◽  
M Wehmöller
Keyword(s):  
Bone Reconstruction ◽  
Skull Bone

scholarly journals Microstructure and Mechanical Properties of AISI 316L Produced by Directed Energy Deposition-Based Additive Manufacturing: A Review

2020 ◽  
Vol 10 (9) ◽  
pp. 3310 ◽  
Author(s):  
Abdollah Saboori ◽  
Alberta Aversa ◽  
Giulio Marchese ◽  
Sara Biamino ◽  
Mariangela Lombardi ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Energy Deposition ◽  
Mechanical Characteristics ◽  
Mechanical Performance ◽  
Functionally Graded ◽  
Published Data ◽  
Aisi 316L ◽  
Building Conditions ◽  
Directed Energy Deposition ◽  
Directed Energy

Directed energy deposition (DED) as a metal additive manufacturing technology can be used to produce or repair complex shape parts in a layer-wise process using powder or wire. Thanks to its advantages in the fabrication of net-shape and functionally graded components, DED could attract significant interest in the production of high-value parts for different engineering applications. Nevertheless, the industrialization of this technology remains challenging, mainly because of the lack of knowledge regarding the microstructure and mechanical characteristics of as-built parts, as well as the trustworthiness/durability of engineering parts produced by the DED process. Hence, this paper reviews the published data about the microstructure and mechanical performance of DED AISI 316L stainless steel. The data show that building conditions play key roles in the determination of the microstructure and mechanical characteristics of the final components produced via DED. Moreover, this review article sheds light on the major advancements and challenges in the production of AISI 316L parts by the DED process. In addition, it is found that in spite of different investigations carried out on the optimization of process parameters, further research efforts into the production of AISI 316L components via DED technology is required.

scholarly journals Конечно-элементное моделирование одноосного растяжения образцов из функционально-градиентного материала с использованием мультилинейной модели пластичности

2021 ◽  
Vol 91 (1) ◽  
pp. 26
Author(s):  
В.Ш. Суфияров ◽  
А.В. Орлов ◽  
Е.В. Борисов ◽  
И.А. Полозов ◽  
А.А. Попович ◽  
...  
Keyword(s):  
Mechanical Characteristics ◽  
Plastic Material ◽  
Material Model ◽  
Mechanical Effect ◽  
Functionally Graded ◽  
Bilinear Model ◽  
Graded Materials ◽  
Element Approach ◽  
Simulation Results ◽  
Level Of Agreement

In this paper, the authors suggested a finite element approach to the simulation of mechanical properties of functionally graded materials (FGM) using a multilinear plastic material model. The approach was used to simulate tensile test experiments on the homogeneous specimens manufactured at two laser power regimes and composite specimens based on the materials considered. We showed a correlation between the simulation results and the experiment. We studied the mechanical effect of geometry and size of inserts in the composite specimens and determined that changing the size and geometry of the inserts can modify the mechanical characteristics of the specimen. We found that the multilinear plastic material model provides the highest level of agreement between simulation and experimental results and, unlike the bilinear model, is more comprehensive.

Electromagnetic absorption and thermoelastic analysis of a functionally graded wave absorber

2016 ◽  
Vol 12 (3) ◽  
pp. 534-542 ◽  
Author(s):  
Hongyan Tian ◽  
Jianbing Sang ◽  
Rihan Ao ◽  
Shujun Hou
Keyword(s):  
Electromagnetic Wave ◽  
Material Property ◽  
Mechanical Characteristics ◽  
Functionally Graded ◽  
Impedance Match ◽  
Gradual Change ◽  
Content Type ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Absorbing Materials

Purpose As a good absorbing material candidate, a functionally graded wave absorber can be tailored to satisfy the impedance match principle by gradually changing material property. The paper aims to discuss these issues. Design/methodology/approach The electromagnetic wave absorption properties are discussed. An analysis model is proposed to provide an insight into its mechanical characteristics during wave absorption. Considering the energy-converting and thermal deformation properties, the thermoelastic behaviors of an absorber are analyzed by numerical method. The effects of material and geometrical properties are discussed in detail. Findings The results demonstrate that absorbing effect of graded composite is enhanced. Good performance of low reflectance and high absorption with gentle thermal stress distribution can be obtained by proper designing of the gradient absorber. Originality/value Functionally graded materials exhibit a progressive compositional gradient change along certain dimension of structures, which can be used as absorbing materials for the gradual change of material property tailored to satisfy the principle of impedance match. The design of functionally graded absorbing materials usually should consider not only the electromagnetic performance, but also the mechanical properties simultaneously. Therefore, few investigations have addressed the mechanical characteristics of absorbers. This paper presents some studies on the electromagnetic, especially mechanical behaviors during electromagnetic wave absorption. It is helpful to provide mechanical reference for designing an absorber.

Control of Mechanical Properties of Functionally Graded Dual-Nanoparticle-Reinforced Composites

2018 ◽  
Vol 941 ◽  
pp. 2037-2040
Author(s):  
Han Sang Kwon ◽  
Je Hong Park ◽  
Kwon Hoo Kim ◽  
Marc Leparoux ◽  
Jean Francois Silvain ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Mechanical Characteristics ◽  
Functionally Graded ◽  
Matrix Composites ◽  
Reinforced Composites ◽  
Layered Composites ◽  
Graded Materials ◽  
Al Matrix Composites ◽  
Al Matrix Composite ◽  
Al Matrix

Functionally graded aluminium (Al) matrix composite materials reinforced with carbon nanotubes (CNT) and silicon carbide nanoparticles (nSiC) or nanodiamond (nD) were fabricated using a powder-metallurgical route. The nSiC and nD were not only used as a reinforcement but also as an active solid mixing agent for dispersing the CNT in the Al powder. Dual-nanoparticle-reinforced functionally graded multiple-layered composites were found to exhibit different mechanical characteristics. In particular, the hardnesses of the CNT-and nSiC-reinforced composites were dramatically increased, being up to eight times greater (330 HV) than that of bulk pure Al. In the case of the combination of the CNT and nD nanoparticles, the reinforced Al matrix composites exhibited the highest flexural strength (about 760 MPa). This functionally graded dual-nanoparticle approach could also be applied to other nanoreinforced systems, such as ceramics or complex hybrid-matrix materials. Keywords: Carbon nanotubes (CNT), nanosilicon carbide (nSiC), nanodiamond (nD), functionally graded materials (FGM), Powder metallurgy

scholarly journals Dental Anthropology-A Revolutionary Tool in Forensic Science

2021 ◽  
pp. 97-106
Author(s):  
Anura Saher Raza ◽  
Amit Reche ◽  
Kumar Gaurav Chhabra ◽  
Priyanka Paul Madhu ◽  
Drishti Dixit
Keyword(s):  
Genetic Structure ◽  
Forensic Science ◽  
Cultural Factors ◽  
Morphological Properties ◽  
Bone Reconstruction ◽  
Skull Bone ◽  
Dental Anthropology ◽  
Indirect Identification ◽  
Distinct Morphology ◽  
Development And Evolution

Dental anthropology is a field of physical anthropology that studies the origin, development, and evolution of anthropoid dentitions, as well as their relationship to social, physical, and cultural factors. Teeth have their own distinct morphology and physiology, which is in stark contrast to the body's genetic structure. Teeth are also unique among the resistant elements of archaeological and fossil remains in that they have been exposed on the body's surface throughout their lives. As a result, dental anthropology may be assessed in the mouth cavity of living humans using similar methods to those used for prehistoric relics. As a result, it's no surprise that practising dental surgeons have historically ranked well among dental anthropologists. This review’s initial purpose is to provide an overview of the morphological and non-morphological properties of animate dentitions that aid in the indirect identification of prehistoric remains and the understanding of their cultural, social, and physical relationships, as well as to assist forensic odontologists with craniofacial identification and skull bone reconstruction.

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