Surface Fractal Analysis for Estimating the Fracture Energy Absorption of Nanoparticle Reinforced Composites

Abstract

In this study, the fractal dimensions of failure surfaces of vinyl ester based nanocomposites are estimated using two classical methods, Vertical Section Method (VSM) and Slit Island Method (SIM), based on the processing of 3D digital microscopic images. Self-affine fractal geometry has been observed in the experimentally obtained failure surfaces of graphite platelet reinforced nanocomposites subjected to quasi-static uniaxial tensile and low velocity punch-shear loading. Fracture energy and fracture toughness are estimated analytically from the surface fractal dimensionality. Sensitivity studies show an exponential dependency of fracture energy and fracture toughness on the fractal dimensionality. Contribution of fracture energy to the total energy absorption of these nanoparticle reinforced composites is demonstrated. For the graphite platelet reinforced nanocomposites investigated, surface fractal analysis has depicted the probable ductile or brittle fracture propagation mechanism, depending upon the rate of loading.

Experimental and finite element modeling of vinyl ester nanocomposites under blast and quasi‐static flexural loading

“…Moreover, tremendous drop in mechanical properties (energy absorption) is more pronounced with adding xGnP rather than that associated with nanoclay reinforcement. On the contrary, another study reported 10% improvement in impact energy absorption with addition of 2.5 wt % graphite platelets to brominated resin 7…”

“…Bromination outcome on punch shear characteristics for laminated face sheets and sandwich composites of vinyl ester nanocomposites was investigated using Dynatup 8250 drop‐weight impact instrument 7. Test results showed that more than 10% improvement in impact energy absorption with addition of 2.5 wt % graphite platelets to brominated resin.…”

Simulation of Interaction Process in the System STM Probe – Sample With a Complex Relief: Recommendations on the Standard Technological Mode

“…Возможность выхода из строя зонда СТМ, приводящее к искажению визуальной картины поверхности образца и изменения параметров проводимости между образцом и зондом, существенно ограничивает применение СТМ для изучения больших площадей образца с высоким разрешением. Исходя из вышеизложенного, можно с уверенностью утверждать, что результаты моделирования процесса взаимодействия зонда СТМ с поверхностью образца будут способствовать получению точной измерительной информации о геометрических параметрах поверхности образца и электрических характеристиках наноструктур и острия, что находит важное практическое применение при изучении, например, фрактальных структур, обладающих принципиально новыми физико-химическими свойствами [20][21][22][23][24][25].…”

Fabrication of Modified MMT/Glass/Vinylester Multiscale Composites and Their Mechanical Properties

“…Thermoset polymer vinylester is among the most widely used polymers due to its excellent barrier and thermal properties, chemical stability, corrosion resistance, light weight, low cost, and ease of processing [27][28][29]. Pure vinylester is brittle; to overcome this limitation, the resin is reinforced or reacted with various fillers or modifiers [30,31]. The most often used filler material with pure vinylester is glass fiber.…”