Topic
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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TL;DR: In this article, the authors describe a critical distance theory which uses local stress field information to predict the effect of stress concentrations on fracture strength in ceramics containing notches, long cracks and short cracks.
154 citations
Patent•
03 Feb 1988
TL;DR: In this paper, a table of diamond or boron nitride particles with a strong, chemically inert binder matrix and a thin metal layer bonded directly to the table in a HP/HT press is characterized by having high thermal stability at temperatures up to 1200°C.
Abstract: A composite compact adapted for high-temperature uses, such as a cutter on a rotary drill bit, which includes a relatively thick table of diamond or boron nitride particles with a strong, chemically inert binder matrix and a thin metal layer bonded directly to the table in a HP/HT press. The table is characterized by having high thermal stability at temperatures up to 1200° C. The thickness of the thin metal layer, which does not exceed one-half that of the table, is selected such that at temperatures up to 1200° C. the differential forces due to thermal expansion do not exceed the fracture strength of the table.
154 citations
TL;DR: In this article, an experimental study and theoretical analyses on the monotonic and fatigue performance in bending of a polyvinyl alcohol (PVA) fiber-reinforced engineered cementitious composite (ECC) overlay system is investigated.
154 citations
TL;DR: The results showed that filler silanation is an important factor for determining material strength and the shear punch test may prove beneficial for routine testing of composites as specimen preparation was simple, specimen quality was easy to maintain and the results are meaningful.
154 citations
TL;DR: An innovative technique to develop polyurethane foams containing nanoparticles is introduced in this article, where polymethylene polyphenylisocyanate (Part A) is mixed with nanoparticles such as SiC and TiO 2, and irradiated with a high power ultrasound liquid processor.
Abstract: An innovative technique to develop polyurethane foams containing nanoparticles is introduced. Polymethylene polyphenylisocyanate (Part A) is mixed with nanoparticles such as SiC and TiO 2 , and irradiated with a high power ultrasound liquid processor. In the next step, the modified foams containing nanoparticles are mixed with Part B (containing polyol resin systems, surfactant, and an amine catalyst) through a high-speed mechanical stirrer. The mixture is then cast into rectangular molds to make nanophased foam panels. Test coupons were later extracted from the panels to carry out morphological and mechanical characterizations. The as-prepared foams were characterized by scanning electron microscopy (SEM), X-ray diffraction, and thermo gravimetric analysis (TGA). The SEM studies have shown that the particles are in nanosize, non-agglomerated, and well dispersed in the entire volume of the foam. The foam cells are well ordered and uniform in size and shape. The TGA analyses indicate that the modified foams are thermally more stable than the parallel neat system. Quasi-static flexure tests under three-point bend configuration have also been conducted with both modified and neat foams. Test results show a significant increase (approximately in the range of 50–70%) in the flexural strength and stiffness of the nanophased foams over the neat system. This enhancement in flexural properties have been demonstrated repeatedly with multiple batches and with at least three specimens tested from each batch. Details of the fabrication procedure, synthesis, and characterization are presented in this paper.
153 citations