Initial Survey on Fracture Toughness of Commerical Nd2Fe14B

1994 ◽  
Vol 364 ◽  
Author(s):  
J.A. Horton ◽  
J.H. Schneibel
Keyword(s):  
Fracture Toughness ◽  
Production Methods ◽  
Energy Product ◽  
Chevron Notch ◽  
Different Types ◽  
Point Bend Test ◽  
Hard Magnet ◽  
Three Point Bend Test ◽  
Initial Survey ◽  
Point Bend

AbstractNd2Fe14B is currently the best (highest energy product) hard magnet available. Like most magnetic materials, it is rather brittle. The fracture toughness of specimens of commercially available Nd2Fe14B magnets were measured using a chevron notch three point bend test. Values ranged from nearly 2 to 5.5 MPa√m. Consistent differences were found between the five different types of materials tested. In this initial survey, insufficient tests were done for good statistics to be obtained. However, it appears that this test will allow differences in fracture toughness between alloys with different compositions and fabricated by different production methods to be measured and tracked as improvements are made.

scholarly journals Mechanical Performance of Honeycomb Sandwich Structures Using Three-Point Bend Test

2019 ◽  
Vol 9 (2) ◽  
pp. 3955-3958
Author(s):  
T. Subhani
Keyword(s):  
Mechanical Performance ◽  
Sandwich Structures ◽  
Bend Test ◽  
Core Material ◽  
Honeycomb Core ◽  
Adhesive Film ◽  
Honeycomb Sandwich ◽  
Point Bend Test ◽  
Three Point Bend Test ◽  
Point Bend

In this study, honeycomb sandwich structures were prepared and tested. Facesheets of sandwich structures were manufactured by carbon fiber epoxy matrix composites while Nomex® honeycomb was used as core material. An epoxy-based adhesive film was used to bond the composite facesheets with honeycomb core. Four different curing temperatures ranging from 100oC to 130oC were applied with curing times of 2h and 3h. Three-point bend test was performed to investigate the mechanical performance of honeycomb sandwich structures and thus optimize the curing parameters. It was revealed that the combination of a temperature of 110oC along with a curing time of 2h offered the optimum mechanical performance together with low damage in honeycomb core and facesheets.

scholarly journals Influence of Phase Composition on Sintered Microstructure of Combustion Synthesized Oxides

2007 ◽  
Vol 2007 ◽  
pp. 1-5
Author(s):  
Ibram Ganesh ◽  
J. M. F. Ferreira
Keyword(s):  
Composite Powder ◽  
Single Phase ◽  
Absorption Capacity ◽  
Synthesis Methods ◽  
Water Absorption Capacity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Point Bend Test ◽  
Three Point Bend Test ◽  
Point Bend

The effects of powders synthesis methods (urea-combustion synthesis (CS) and conventional solid-state (SS) reaction) on the sintering ability, microstructural features, and mechanical properties ofAl2O3,MgAl2O4spinel, and 20 wt.% ZrO2–MgAl2O4upon sintering at 1625C∘were investigated. X-ray diffraction (XRD), scanning electron microscopy (SEM), relative density (RD), apparent porosity and water absorption capacity, hardness, fracture toughness, and three-point bend test studies revealed the superior sintering ability of CS ZrO2-MgAl2O4composite powder as compared with one prepared by SS reaction. In contrast, single-phase powders obtained by SS reaction exhibit superior sintering ability over CS synthesized ones. The reasons for differences observed are discussed along this paper.

FEM Modelling Techniques for Three Point Bend Test of Rubber Composites

2018 ◽  
Vol 919 ◽  
pp. 257-265 ◽  
Author(s):  
Jan Kledrowetz ◽  
Jakub Javořík ◽  
Rohitha Keerthiwansa ◽  
Pavel Nekoksa
Keyword(s):  
Test Sample ◽  
Bend Test ◽  
Rubber Matrix ◽  
Vertical Force ◽  
The Matrix ◽  
Composite Models ◽  
Modelling Techniques ◽  
Point Bend Test ◽  
Three Point Bend Test ◽  
Point Bend

This paper studies different modelling methodologies for a calculation of the three point bend test. Test samples are composed of a rubber matrix and either steel or textile cords reinforcement. Prior to the bending tests, all of the used materials including the matrix and the reinforcement were measured to find out their mechanical properties. Rubber materials were described using hyperelastic models. FEM software MSC Marc/Mentat is employed as a calculation tool and its various functionalities are utilized for a description of the test composite models. The main observed outcome is a dependence of the vertical force causing the test sample deformation on the amount of the deformation. Calculated results are compared to each other and to measurements. Then, all the modelling techniques are evaluated.

Serendipity and the three point bend test

1990 ◽  
Vol 42 (1) ◽  
pp. R15-R18 ◽  
Author(s):  
M. Dagbasi ◽  
C. E. Turner
Keyword(s):  
Bend Test ◽  
Point Bend Test ◽  
Three Point Bend Test ◽  
Point Bend
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