Some Mechanical Properties of Sintered Fiber Metal Composites

Investigations related to polymer/metal composites are often limited to the analysis of the electrical and thermal conductivity of the materials. The presented study aims to analyze the impact of aluminum (Al) filler content (from 1 to 20 wt%) on the rarely investigated properties of composites based on the high-density polyethylene (HDPE) matrix. The crystalline structure, rheological (melt flow index and oscillatory rheometry), thermal (differential scanning calorimetry), as well as static (tensile tests, hardness, rebound resilience) and dynamic (dynamical mechanical analysis) mechanical properties of composites were investigated. The incorporation of 1 and 2 wt% of aluminum filler resulted in small enhancements of mechanical properties, while loadings of 5 and 10 wt% provided materials with a similar performance to neat HDPE. Such results were supported by the lack of disturbances in the rheological behavior of composites. The presented results indicate that a significant content of aluminum filler may be introduced into the HDPE matrix without additional pre-treatment and does not cause the deterioration of composites’ performance, which should be considered beneficial when engineering PE/metal composites.

Download Full-text

Residual Stresses in Intrinsic UD-CFRP-Steel-Laminates - Experimental Determination, Identification of Sources, Effects and Modification Approaches

Materials Science Forum ◽

10.4028/www.scientific.net/msf.825-826.369 ◽

2015 ◽

Vol 825-826 ◽

pp. 369-376 ◽

Cited By ~ 5

Author(s):

Robert Prussak ◽

Daniel Stefaniak ◽

Christian Hühne ◽

Michael Sinapius

Keyword(s):

Mechanical Properties ◽

Residual Stress ◽

Tensile Strength ◽

Epoxy Composite ◽

Thermal Residual Stress ◽

Fiber Metal Laminates ◽

Fiber Metal ◽

Impact Energies ◽

The Impact ◽

Specific Impact

This paper focuses on the reduction of process-related thermal residual stress in fiber metal laminates and its impact on the mechanical properties. Different modifications during fabrication of co-cure bonded steel/carbon epoxy composite hybrid structures were investigated. Specific examinations are conducted on UD-CFRP-Steel specimens, modifying temperature, pressure or using a thermal expansion clamp during manufacturing. The impact of these parameters is then measured on the deflection of asymmetrical specimens or due yield-strength measurements of symmetrical specimens. The tensile strength is recorded to investigate the effect of thermal residual stress on the mechanical properties. Impact tests are performed to determine the influence on resulting damage areas at specific impact energies. The experiments revealed that the investigated modifications during processing of UD-CFRP-Steel specimens can significantly lower the thermal residual stress and thereby improve the tensile strength.

Download Full-text

Composite Sandwich with Aluminum Foam Core and Adhesive Bonded Carbon Fiber Reinforced Thermoplastic Cover Layer

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.744.277 ◽

2017 ◽

Vol 744 ◽

pp. 277-281 ◽

Cited By ~ 1

Author(s):

Alexander Hackert ◽

Claudia Drebenstedt ◽

Tristan Timmel ◽

Tomasz Osiecki ◽

Lothar Kroll

Keyword(s):

Mechanical Properties ◽

Aluminum Foam ◽

New Technologies ◽

Bending Stiffness ◽

Metal Composite ◽

Fiber Reinforced ◽

Metal Composites ◽

Reinforced Plastics ◽

Composite Sandwich ◽

Fiber Reinforced Plastics

The combination of metals and fiber reinforced plastics is also known as hybrid metal composites. They offer the fusion of the good static mechanical properties of the fiber reinforced plastics and the good dynamic mechanical properties of the metal. For that reason, parts made of hybrid metal composites are predestined for the use as load relevant parts. The purpose of this study was to develop new technologies for semi finished hybrid metal composite materials. Thermoplastic Fiber-Reinforced Composites (TP-FRC) were arranged with new, isotropic, closed pore Aluminum Foam (AF) structures to an Extrinsically Combined Composite Sandwich (ECCS) by adhesive bonding. They form the basis for novel weight-optimized as well as cost-effective applications. The entire manufacturing process for the continuous semi-finished product was examined and verified according DIN EN 2563. This was done with regard to subsequent characterization by the specific bending modulus and specific bending stiffness. The examinations show a high bending stiffness and high strength structures combined with excellent damping properties at high damage tolerances. These are the most requested in automotive applications.

Download Full-text

Enhancing the Mechanical Properties of Hot Roll Bonded Al/Ti Laminated Metal Composites (LMCs) by Pre-Rolling Diffusion Process

Metals ◽

10.3390/met9070795 ◽

2019 ◽

Vol 9 (7) ◽

pp. 795 ◽

Cited By ~ 4

Author(s):

Cheng Zhang ◽

Shouxin Wang ◽

Hanxue Qiao ◽

Zejun Chen ◽

Taiqian Mo ◽

...

Keyword(s):

Mechanical Properties ◽

Electron Microscope ◽

Diffusion Process ◽

Energy Dispersive Spectrometer ◽

Tensile Tests ◽

Optical Microscope ◽

Interfacial Structure ◽

Metal Composites ◽

Diffusion Temperature ◽

Scanning Electron

In this study, the traditional hot rolling to fabricate Al/Ti laminated metal composites (LMCs) was improved by using a pre-rolling diffusion process. The effect of the pre-rolling diffusion on microstructure and mechanical properties of Al/Ti LMCs were investigated by various methods, such as optical microscope (OM), scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and tensile tests. The results show that, with increasing diffusion temperature, the thickness in diffusion layer was increased and the mechanical properties of LMCs were improved obviously, which was attributed to the optimized interfacial structure after diffusion process. In addition, the formation of TiAl3 intermetallic compounds (IMCs) was detected in the bonding interface, which played an important role in improving the mechanical properties for Al/Ti LMCs. The predicted results of stress-strain curves from rule of mixture (ROM) indicated that, there existed an extra interfacial strengthening in Al/Ti LMCs beside the mechanical properties provided by the contribution of constituent layers. The pre-rolling diffusion process is effective for the optimization of interfacial structure and improvement of mechanical properties in Al/Ti LMCs.

Download Full-text

The effect of an elastomer interlayer thickness variation on the mechanical properties of Fiber-Metal-Laminates

Composite Structures ◽

10.1016/j.compstruct.2019.03.042 ◽

2019 ◽

Vol 219 ◽

pp. 90-96 ◽

Cited By ~ 5

Author(s):

Matthias M. Stoll ◽

Vincent Sessner ◽

Manuel Kramar ◽

Jakob Technau ◽

Kay A. Weidenmann

Keyword(s):

Mechanical Properties ◽

Thickness Variation ◽

Interlayer Thickness ◽

Fiber Metal Laminates ◽

Fiber Metal

Download Full-text

The Deformation Characteristics, Fracture Behavior and Strengthening-Toughening Mechanisms of Laminated Metal Composites: A Review

Metals ◽

10.3390/met10010004 ◽

2019 ◽

Vol 10 (1) ◽

pp. 4 ◽

Cited By ~ 1

Author(s):

Kuan Gao ◽

Xin Zhang ◽

Baoxi Liu ◽

Jining He ◽

Jianhang Feng ◽

...

Keyword(s):

Mechanical Properties ◽

Metal Matrix Composites ◽

Metal Matrix ◽

Fracture Behavior ◽

Tensile Fracture ◽

Matrix Composites ◽

Deformation Characteristics ◽

Toughening Mechanisms ◽

Metal Composites ◽

Fracture Elongation

Multilayer metal composites have great application prospects in automobiles, ships, aircraft and other manufacturing industries, which reveal their superior strength, toughness, ductility, fatigue lifetime, superplasticity and formability. This paper presents the various mechanical properties, deformation characteristics and strengthening–toughening mechanisms of laminated metal matrix composites during the loading and deformation process, and that super-high mechanical properties can be obtained by adjusting the fabrication process and structure parameters. In the macroscale, the interface bonding status and layer thickness can effectively affect the fracture, impact toughness and tensile fracture elongation of laminated metal matrix composites, and the ductility and toughness cannot be fitting to the rule of mixture (ROM). However, the elastic properties, yield strength and ultimate strength basically follow the rule of mixture. In the microscale, the mechanical properties, deformation characteristics, fracture behavior and toughening mechanisms of laminated composites reveal the obvious size effect.

Download Full-text

A review of mechanical drilling on fiber metal laminates

Journal of Composite Materials ◽

10.1177/0021998320957743 ◽

2020 ◽

pp. 002199832095774

Author(s):

Eduardo Pires Bonhin ◽

Sarah David-Müzel ◽

Manoel Cléber de Sampaio Alves ◽

Edson Cocchieri Botelho ◽

Marcos Valério Ribeiro

Keyword(s):

Mechanical Properties ◽

Cutting Parameters ◽

Burr Formation ◽

Drilling Process ◽

Machining Parameters ◽

Specific Mass ◽

Fiber Metal Laminates ◽

Dimensional Error ◽

Main Method ◽

Fiber Metal

The use of fiber metal laminates (FML) in aeronautics components has been increased in the last years, mainly due to the gain in mechanical properties combined with low specific mass. However, in the assembly of these materials on the structures to which they will be attached, mechanical screwing is still the main method used, which requires the performance of drilling processes. Something it is very complicated for these materials and can cause damage that compromises the performance. Therefore, this work aims to approach and summarize the evolution of the mechanical drilling process on FML developed in the last years. By the work, the main problems that occur during the drilling of these materials are punctually approached, such as delamination, burr formation, dimensional error, poor roughness, and tool wear. In addition, it is presented how these problems are affected by the machining parameters (cutting parameters, geometry, material/coating tool, and cutting environment), as well as suggestions for minimizing process problems. Thus, the article intends to provide as much information as possible available in the literature, seeking to help researchers gain a comprehensive view of the mechanical drilling of fiber metal laminates.

Download Full-text

Effect of initial texture and microstructure of Mg on mechanical properties of Mg – Stainless steel laminated metal composites

Materials Characterization ◽

10.1016/j.matchar.2017.03.006 ◽

2017 ◽

Vol 127 ◽

pp. 171-178 ◽

Cited By ~ 4

Author(s):

Alireza Sadeghi ◽

Nobuhiko Kyokuta ◽

Junya Inoue ◽

Toshihiko Koseki

Keyword(s):

Mechanical Properties ◽

Stainless Steel ◽

Metal Composites ◽

Initial Texture

Download Full-text

The Mechanical Properties of Fiber Metal Laminates Based on 3D Printed Composites

Materials ◽

10.3390/ma13225264 ◽

2020 ◽

Vol 13 (22) ◽

pp. 5264

Author(s):

Bharat Yelamanchi ◽

Eric MacDonald ◽

Nancy G. Gonzalez-Canche ◽

Jose G. Carrillo ◽

Pedro Cortes

Keyword(s):

Mechanical Properties ◽

3D Printing ◽

High Velocity ◽

Mechanical Performance ◽

High Velocity Impact ◽

Low Velocity ◽

Fiber Metal Laminates ◽

Velocity Impact ◽

3D Printed ◽

Fiber Metal

The production and mechanical properties of fiber metal laminates (FMLs) based on 3D printed composites have been investigated in this study. FMLs are structures constituting an alternating arrangement of metal and composite materials that are used in the aerospace sector due to their unique mechanical performance. 3D printing technology in FMLs could allow the production of structures with customized configuration and performance. A series of continuous carbon fiber reinforced composites were printed on a Markforged system and placed between layers of aluminum alloy to manufacture a novel breed of FMLs in this study. These laminates were subjected to tensile, low velocity and high velocity impact tests. The results show that the tensile strength of the FMLs falls between the strength of their constituent materials, while the low and high velocity impact performance of the FMLs is superior to those observed for the plain aluminum and the composite material. This mechanism is related to the energy absorption process displayed by the plastic deformation, and interfacial delamination within the laminates. The present work expects to provide an initial research platform for considering 3D printing in the manufacturing process of hybrid laminates.

Download Full-text