In this paper, an efficient method to characterize the mode II fracture toughness KIIC for materials with preferred interfaces such as wood, fiber composite materials and bonded materials based on the Iosipescu fixtur...
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In this paper, an efficient method to characterize the mode II fracture toughness KIIC for materials with preferred interfaces such as wood, fiber composite materials and bonded materials based on the Iosipescu fixture is developed. A simple formula for calculating KIIC is verified numerically. Our method is easy to implement and is free of friction thereby offering a more reasonable value of KIIC than previous methods. A calibration chart for composite materials is generated. Finite element analysis along with cohesive elements is used to validate experimental load-displacement curves by testing bonded polymers.
An integrated experimental and numerical analysis is carried out to study the interfacial shear strength of bonded materials. Two types of shear tests, namely the losipescu shear test, and the short-beam shear test ar...
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Experiments and complimentary simulations are presented to demonstrate the size-dependent infiltration and detection of variable length nucleic acids in porous silicon with controllable pore diameters in the range of ...
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We describe a fast and efficient method for recognition and quality control of the largearea graphene layers based on image processing algorithms. Results show that our technique is accurate and has potential for indu...
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X-ray microfluorescence imaging technique has been used as a significant tool in order to investigate minerals contents in some kinds of materials. The aim of this study was to evaluate the elemental distribution of c...
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X-ray microfluorescence imaging technique has been used as a significant tool in order to investigate minerals contents in some kinds of materials. The aim of this study was to evaluate the elemental distribution of calcium and zinc in bone substitute materials (nanohydroxyapatite spheres) and cortical bones through X-Ray Microfluorescence analysis with the increment of Synchrotron Radiation in order to evaluate the characteristics of the newly formed bone and its interface, the preexisting bone and biomaterials by the arrangement of collagen fibers and its birefringence. The elemental mapping was carried out at Brazilian Synchrotron Light Laboratory, Campinas - Sao Paulo, Brazil working at D09-XRF beam line. Based on this study, the results suggest that hydroxyapatite-based biomaterials are biocompatible, promote osteoconduction and favored bone repair.
Although a high electric energy density was recently reported for defect-modified poly(vinylidene fluoride) (PVDF) copolymers at millisecond discharge, they usually deliver less energy at a high pulse rate. In this wo...
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