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Showing 1 to 14 of 14 for “"flexural testing"”.
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Large strain flexural testing of thin composite laminates
… strain range common to deployable structures. Flexural behavior is characterized by the moment vs. curvature response therefore requiring a bending test. A special test fixture is developed to allow flexural testing of thin plates at large strains. Reaching large strains during the test …
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Design and fabrication of meso-scale flexural testing apparatus for evaluating aligned CNT composite flexures
… thesis, is to design, fabricate and assemble a testing apparatus optimized for evaluating aligned CNT based composites. Using existing literature on composites and present limitations on their growth, functional requirements are set down for the testing apparatus. Several designs are …
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Development of a biofidelic cranial bone surrogate using additive manufacturing
… mechanical, impact and blast, and biomedical testing. Such surrogate models often attempt to mimic the properties of bone to achieve best results. This research focuses on using additive manufacturing to develop a 3D printed cranial bone surrogate that closely replicates the mechanical, …
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Epoxy-Based, Rapid Setting Polymer Concretes for use in Military Airfield Repairs
… Manual M 3-270-01.08-2. This manual defines testing protocol to be used for rapidsetting rigid repair materials intended for use on rigid airfield pavement spall repairs. These tests include various ASTM standards for compressive strength, flexural strength, slant-shear bonding strength, …
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Development and Structural Performance Assessment of Low-Carbon Concrete Using Recycled Concrete Aggregates and Secondary Materials
… concrete materials. Extensive materials testing and analysis of existing literature found that RCA sources possess up to 21% lower bulk specific gravity (BSG) and over 200% higher water absorption values relative to natural aggregate sources. The effect of RCA within experimental within …
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Characterisation and refinement of properties of glass fibre reinforced polyester polymer concrete for use in manhole components
… polymer concrete manhole components. The main testing procedure involved flexural testing of beam specimens. Preliminary tests were carried out to measure strength, toughness, strain rate sensitivity, and the effect of different reinforcing materials. Accelerated degradation tests were then …
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Analytical Modeling of the Repair Impact-Damaged Prestressed Concrete Bridge Girders
… cementitious matrix (FRCM) overlays. The flexural strength of four AASHTO Type III girders, three of which were intentionally damaged and repaired, was evaluated. Six experimental tests were performed on these girders: one undamaged girder test and five repair method tests. Nonlinear beam …
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Carbon Fiber Reinforced Polymer Retrofits to Increase the Flexural Capacity of Deteriorated Steel Members
… HM strand sheets perform in small scale tensile testing and large scale flexural testing (laboratory and in situ testing). During the laboratory testing, these HM strand sheets were compared against normal modulus (NM) CFRP plates to draw conclusions on these different retrofitting materials …
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Experimental and Numerical Investigation of the Mechanical Properties of Novel Bamboo-Timber and Bamboo Composites for Sustainable Construction
… tests were conducted using a universal testing machine (UTM). The mechanical tests consist of compression parallel to the grain, compression perpendicular to the grain, and flexure in accordance with ISO 22157 and ASTM D143 (with adjustments) in order to determine the modulus of …
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Retrofit of Reinforced Concrete Beams using Externally Bonded and Unbonded Fiber Metal Laminate
This research investigates the flexural behavior of reinforced concrete (RC) beams retrofitted with fiber metal laminate (FML), an advanced hybrid material composed of alternating layers of metal and fiber-reinforced polymer (FRP) composites bonded through a thermoplastic or thermoset polymeric …
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Fresh Mix Properties and Flexural Analysis with Digital Image Correlation of Additively Manufactured Cementitious Materials
… quality control (QA/QC) methods via standardized testing procedures are of the upmost importance. However, QA/QC methods for these applications have yet to be established. This thesis aims to implement existing ASTM standards to characterize additive manufactured cementitious composites and to …
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Characterization of syntactic foams and their sandwich composites: modeling and experimental approaches
… core sandwich composites for compressive and flexural properties. Flexural tests are carried out in three and four point bending and short beam shear configurations. Syntactic foams are tested in three different specimen sizes and orientations to characterize them as per the recommendations of …
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Thermal regulation of vascularized fiber-reinforced polymer matrix composites
… a PMC is above the Tg, while the rest is below. Flexural testing in a environmental chamber demonstrates up to 90% stiffness retention in a 325 °C environment using active cooling, compared to complete structural deterioration of the non-cooled PMCs. Under these conditions, the outer surfaces are …
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Scaling Effects on Damage Development, Strength, and Stress-Rupture Life on Laminated Composites in Tension
The damage development and strength of ply-level scaled carbon/epoxy composite laminates having stacking sequence of [+Tn/-Tn/902n]s where constraint ply angle, T, was 0, 15, 30, 45, 60, and 75 degrees, and size was scaled as n=1,2,3, and 4, is reported in Part I. X-radiography was used to monitor …