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Flexural strength

About: Flexural strength is a research topic. Over the lifetime, 52123 publications have been published within this topic receiving 846504 citations. The topic is also known as: bending strength & modulus of rupture.


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Journal ArticleDOI
TL;DR: A weak correlation between ash content and the mechanical behavior of the compact bone specimens, particularly Young's modulus, was found, but it could not statistically justify formulation of a more complex multivariate power model incorporating both density and ash content.

208 citations

Journal ArticleDOI
TL;DR: In this paper, the performance of short randomly oriented banana and sisal hybrid fiber reinforced polyester composites was investigated with reference to the relative volume fraction of the two fibers at a constant total fiber loading of 0.40 Vf.
Abstract: The mechanical performance of short randomly oriented banana and sisal hybrid fiber reinforced polyester composites was investigated with reference to the relative volume fraction of the two fibers at a constant total fiber loading of 0.40 volume fraction (Vf), keeping banana as the skin material and sisal as the core material. A positive hybrid effect is observed in the flexural strength and flexural modulus of the hybrid composites. The tensile strength of the composites showed a positive hybrid effect when the relative volume fraction of the two fibers was varied, and maximum tensile strength was found to be in the hybrid composite having a ratio of banana and sisal 4 : 1. The impact strength of the composites was increased with increasing volume fraction of sisal. However, a negative hybrid effect is observed when the impact strength of the composites is considered. Keeping the relative volume fraction of the two fibers constant, that is, banana : sisal = 0.32 : 0.08 (i.e., 4 : 1), the fiber loading was optimized and different layering patterns were investigated. The impact strength of the composites was increased with fiber loading. Tensile and flexural properties were found to be better at 0.40 Vf. In the case of different layering patterns, the highest flexural strength was observed for the bilayer composites. Compared to other composites, the tensile properties were slightly higher for the composite having banana as the skin material and sisal as the core material. Scanning electron micrographs of the tensile and impact fracture surfaces of the hybrid composites having volume fraction 0.20 and 0.40 Vf were studied. The experimental tensile strength and tensile modulus of hybrid composites were compared with those of theoretical predictions. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 1699–1709, 2005

208 citations

Journal ArticleDOI
TL;DR: In this article, the authors present tests on square and circular stainless steel tubular beams and quantify the increase in bending strength resulting from cold-work during the fabrication process using the concept of affinity factors.
Abstract: The paper presents tests on square and circular stainless steel tubular beams. An important part of the test program was to quantify the increase in bending strength resulting from cold‐work during the fabrication process. Tension and compression tests on coupons cut from finished tubes were also included in the test program. Stress‐strain curves for shear were obtained using the coupon test results and the concept of affinity factors. A design method is proposed for stainless steel tubular beams. The method incorporates the increase in strength produced by the cold‐rolling process and is validated by comparing it to the test strengths. Design rules are proposed for the bending and shear strengths and for combined bending and shear. The design procedure proposed is an extension of that described in the ASCE Specification for the Design of Stainless Steel Structural Members. The paper describes a simple noniterative method for calculating deflections of stainless steel tubular beams. The method is suitable...

207 citations

Journal ArticleDOI
TL;DR: In this article, microfibrillar reinforced composites (MFC) based on blends from recycled poly(ethyleneterephthalate) (PET), polypropylene (PP) and a compatibilizer (ethylene-glycidyl methacrylate (E-GMA)) were prepared under industry-relevant conditions by melt extrusion, followed by continuous cold drawing.

207 citations

Journal ArticleDOI
TL;DR: The results suggested that the LTD procedures and the polishing treatment used did not reduce the flexural strength of zirconia bars, and aging or "finishing" treatments had no significant negative effects on flexural strengths.
Abstract: Statement of problem Yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramic material has been reported to possess exceptionally high flexural strength; however, the strength of Y-TZP ceramics can be affected by surface treatments performed by dental laboratory technicians and by intraoral conditions. Purpose This study investigated the influence of low-temperature-degradation (LTD) treatment, airborne-particle abrasion, and polishing on the flexural strength and structural stability of a Y-TZP ceramic material. Material and methods By sectioning zirconia ceramic blocks (Vita In-Ceram YZ blocks) into 25 × 4 × 2-mm bars, 310 specimens were fabricated and divided into 9 groups: Group C, as-sintered (control); group B24h, boiled in water for 24 hours; group B7d, boiled in water for 7 days; group H6h, stored in humidified air at 250°C for 6 hours; group H24h, stored in humidified air at 250°C for 24 hours; group H7d, stored in humidified air at 250°C for 7 days; group P, polished; group A, airborne-particle abraded; and group AB, airborne-particle abraded and boiled for 7 days. The flexural strengths (MPa) of all specimens were determined by using a 3-point bending test. The variability was analyzed by using Weibull statistics. Pairwise differences among the 9 groups were evaluated by using confidence intervals (95%) for scale and shape parameters. From every block used, 8 specimens were obtained and every specimen was marked according to the location of its origin from the original block. Surfaces of the specimens were evaluated by using scanning electron microscopy (SEM) at various magnifications. X-ray diffraction analysis was performed to identify possible tetragonal-to-monoclinic phase transformations. Energy dispersive spectroscopy (EDS) was used to obtain information on the chemical composition. Results Aging or “finishing” treatments had no significant negative effects on flexural strengths. Mean flexural strengths ranged from 796.7 to 950.2 MPa. Group A exhibited the highest mean flexural strength (950.2 MPa). Weibull modulus values ranged between 5.6 and 9.3. Tetragonal-to-monoclinic phase transformation was detected for a specimen boiled for 24 hours. More tetragonal-to-monoclinic phase transformation was detected for specimens boiled for 7 days and stored in humidified air at 250°C for 7 days. The SEM examination of fractured surfaces revealed sintering defects, and EDS analysis showed less yttria concentration on Y-TZP specimens that were boiled for 7 days. Conclusion Within the limitations of this study, the results suggested that the LTD procedures and the polishing treatment used did not reduce the flexural strengths of zirconia bars. Airborne-particle abrasion increased the flexural strength of specimens.

207 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20243
20233,785
20226,968
20213,940
20203,386
20193,138