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.

Direct Strength Prediction of Cold-formed Steel Members Using Numerical Elastic Buckling Solutions

Abstract: Current design of cold-formed steel members is unduly complicated. Part of this complication arises from the need to perform elastic buckling calculations by hand. Also, complications occur in determining the effective width and resulting effective properties of members. Further, as cross-sections become more optimized (e.g., through the introduction of longitudinal stiffeners) both the elastic buckling and effective width calculations become markedly more complex. In order to investigate alternatives to current design a large amount of experimental data on flexural members of varying geometry is collected. The use of numerical elastic buckling solutions for the entire member, is investigated as an alternative to current practice. Employing strength curves on the entire member, similar to the effective width strength curves for an element, it is found that a "direct strength" approach is a reliable alternative to current design. Such an approach leads to complete flexibility in cross-section geometry, thus greatly increasing the ability to optimize cold-formed steel members. Conservative limitations of the direct strength approach are also addressed.

Flexural response of concrete beams reinforced with FRP reinforcing bars

Abstract: The authors conducted an experimental and theoretical comparison between flexural behaviors of concrete beams reinforced with fiber reinforced plastic (FRP) reinforcing bars and identical conventionally reinforced ones. Comparisons were made in relation to cracking behavior, load-carrying capacities and modes of failure, load-deflection response, flexural rigidity, and strain distribution. The results revealed that perfect bond exists between FRP reinforcing bars and the surrounding concrete. Also, American Concrete Institute (ACI) Code formulas for predicting deflection response, cracking-ultimate moments, and cracked-effective moments of inertia can easily be adapted for modeling the flexural behavior of concrete beams reinforced with FRP reinforcing bars if appropriate modifications are made.

Mechanical properties of short-flax-fibre reinforced compounds

Abstract: The mechanical properties of flax/polypropylene compounds, manufactured both with a batch kneading and an extrusion process were determined and compared with the properties of Natural fibre Mat Thermoplastic (NMT) composites. The fibre length and width distributions of the fibres from the compounds were determined and used to model the expected properties of the materials, which led to reasonable predictions of the interfacial shear stress. It was found that, given their mechanical properties, flax fibres are quite effective in improving strength and stiffness of a compound and effective compatibilisation of the fibre/matrix interphase can be easily reached. The most important factor limiting the properties of the compounds lies in the intricate structure of the fibres themselves, after the interfacial strength is optimised, the internal fibre structure becomes the weakest point.

Strength, durability and shrinkage characteristics of cement stabilised soil blocks

Abstract: The paper outlines results of a comprehensive investigation undertaken to assess the influence of soil characteristics and cement content on the physical properties of stabilised soil blocks. The dry density, compressive and flexural strength, durability and drying shrinkage of over 1500 block tests are outlined in the paper. Experimental results are compared with current specifications and used to develop empirical guidelines for cement content requirements for a range of soil plasticity characteristics. An empirical relationship between compressive and flexural strength is proposed as a simple means of field assessment.