Using a radiant heat test facility to study the options for the fire protection of structures involving coiled MBOR basalt fiber material

2021 ◽  
Vol 29 (6) ◽  
pp. 28-39
Author(s):  
A. N. Garashchenko ◽  
A. V. Vinogradov ◽  
I. Z. Dashtiev ◽  
N. V. Kobylkov ◽  
S. A. Terekhov
Keyword(s):  
Polymer Composite ◽  
Fire Protection ◽  
Composite Structures ◽  
Fossil Fuels ◽  
Heated Surface ◽  
Basalt Fiber ◽  
Fiber Material ◽  
Radiant Heat ◽  
Test Facility ◽  
Thermal Engineering

Introduction. Coiled MBOR basalt fiber material is used to demonstrate the potential of research into the fire protection of structures using a radiant heat test facility. Research methods. A set of high-power halogen lamps is used to simulate a high temperature impact. The heating intensity is adjusted by changing the voltage applied to the lamps, and it is controlled by the thermocouples that record the temperature of the heated surface of a fire proofing material. The studies have proven efficient for various types of fire proofing and various structures. They are especially relevant in providing rational fire protection of polymer composite structures having relatively low thermal resistance (80…120 °С) due to the fact that they are rarely tested in fired furnaces. Results and discussion. Several options of multilayered MBOR-20F fire proofing were tested. Dependences between time, on the one hand, the surface temperature of protected elements (200 × 300 × 20 mm polyurethane plates), and the temperature between the layers of the fire-proofing material, on the other hand, are presented under standard temperature conditions. Fire protection efficiency improvement by PLAZAS fire-resistant adhesive compound, applied between MBOR layers, is demonstrated. This fireproofing method is applicable not only to metal structures. It demonstrates high fireproofing properties and has a strong potential if applied to fireproof polymer composite structures and products. The measurements, taken by thermocouples in the course of a session of tests, can be used to estimate the thermophysical properties of fireproofing materials exposed to high temperatures, which are rare in most cases, although they are necessary for a thermal analysis. It is demonstrated that similar experiments can also be carried out at nonstandard heating temperatures (for example, when the combustion of fossil fuels is imitated). Conclusions. Experiments, conducted using the radiant heat test facility, and thermal engineering calculations allow to accelerate the selection of the optimal fire protection option and identification of the fireproofing thickness. Moreover, this method allows to reasonably minimize the number of costly fired furnace tests using fullscale samples of fireproofed structures and products.

Wear characterization of basalt fiber reinforced polypropylene/polylactic acid hybrid polymer composite

2021 ◽  
pp. 135065012110300
Author(s):  
Arputham Arul Jeya Kumar ◽  
Muniyandi Prakash ◽  
Abburi Lakshmankumar ◽  
Kesuboyina Haswanth
Keyword(s):  
Polylactic Acid ◽  
Polymer Composite ◽  
Basalt Fiber ◽  
Weight Fraction ◽  
The Other ◽  
Wear Loss ◽  
Specimen Preparation ◽  
Fiber Reinforced ◽  
Pin On Disc ◽  
Hybrid Polymer Composite

In this work, the wear loss of basalt fiber reinforced polypropylene/polylactic acid polymer composite was analyzed using pin-on-disc under dry sliding conditions. The polypropylene, polylactic acid, and basalt fiber (chopped fiber) are melted and mixed homogeneously using a twin-screw extruder, which is followed by an injection molding technique for specimen preparation. The specimens are named as PPB1 (polypropylene, 50%; polylactic acid, 35%; basalt fiber, 15%), PPB2 (polypropylene, 55%; polylactic acid, 30%; basalt fiber, 15%), and PPB3 (polypropylene, 60%; polylactic acid, 25%; basalt fiber, 15%) based on their weight fraction. The wear rate and coefficient of friction are measured for each sample subjected to three different loads and sliding velocities. It is observed from the wear mapping that the wear loss of sample PPB3 is relatively less when compared with the other samples. The scanning electron microscope images of the worn-out region of the sample reveal the fracture and dislocation of fibers in the matrix. The sample PPB3 shows low wear loss. It is due to the better cohesion between the fiber and the matrixes when compared with the other samples.

Ultrasonic autofocus imaging of internal voids in multilayer polymer composite structures

Ultrasonics ◽  
2022 ◽  
Vol 120 ◽  
pp. 106657
Author(s):  
Kaipeng Ji ◽  
Peng Zhao ◽  
Chaojie Zhuo ◽  
Mu Chen ◽  
Jian Chen ◽  
...  
Keyword(s):  
Polymer Composite ◽  
Composite Structures

Thermal Dispersion in Metal Foams

2011 ◽  
Author(s):  
Teresa B. Hoberg ◽  
Kenshiro Muramatsu ◽  
Erica M. Cherry ◽  
John K. Eaton
Keyword(s):  
Heat Transfer ◽  
Molecular Diffusion ◽  
Metal Foam ◽  
Heated Surface ◽  
High Surface ◽  
Metal Foams ◽  
Thermal Engineering ◽  
Transfer Model ◽  
Thermal Dispersion ◽  
Transverse Mixing

Open-cell metal foams are of interest for a variety of thermal engineering applications because of their high surface-to-volume ratio and high convective heat transfer coefficients relative to conventional fins. The tortuous flow path through the foam promotes rapid transverse mixing, a fact that is important in heat exchanger applications. Transverse mixing acts to spread heat away from a heated surface, bringing cooler fluid to the foam elements that are in direct contact with the surface. Heat is also spread by conduction in the foam ligaments. The present work addresses fully-coupled thermal dispersion in a metal foam. Dispersion of the thermal wake of a line source was measured. A conjugate heat transfer model was developed which showed good agreement with the data. The validated model was used to examine the complementary effects of the mechanical dispersion, molecular diffusion in the gas, and conduction in the solid.

Design and Modeling of Lightweight Polymer Composite Structures

2020 ◽  
pp. 193-224 ◽  
Author(s):  
Akarsh Verma ◽  
Naman Jain ◽  
Avinash Parashar ◽  
Vinay K. Singh ◽  
M. R. Sanjay ◽  
...  
Keyword(s):  
Polymer Composite ◽  
Composite Structures

Multilayered Ferromagnetic Polymer Composite Structures for High-Density Power Inductors

2016 ◽  
Vol 52 (11) ◽  
pp. 1-5 ◽  
Author(s):  
Dibyajat Mishra ◽  
P. Markondeya Raj ◽  
Joel Tishler ◽  
Teng Sun ◽  
Erik Shipton ◽  
...  
Keyword(s):  
Polymer Composite ◽  
Composite Structures ◽  
High Density ◽  
Power Inductors

scholarly journals ВИДИ МЕТРОЛОГІЧНИХ ХАРАКТЕРИСТИК І СКЛАДУ РОБІТ З ЇХ ВИЗНАЧЕННЯ НА ОСНОВНИХ СТАДІЯХ ІСНУВАННЯ КОМПОЗИТНИХ КОНСТРУКЦІЙ АГРЕГАТІВ ПОВІТРЯНИХ СУДЕН ТРАНСПОРТНОЇ КАТЕГОРІЇ

2021 ◽  
pp. 146-157
Author(s):  
М. Н. Журибеда
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Metrological Support ◽  
Composite Structures ◽  
Metrological Characteristics ◽  
Polymer Composite Materials ◽  
Production Operation ◽  
Complex Criterion ◽  
Design Production ◽  
Technical Products

It is shown that the development of the concept of metrological support for the creation of composite structures of aircraft aggregates of the transport category and their support at all stages of the existence of an aircraft should be based on the formation of a complex criterion for the effectiveness of the use of polymer composite materials. It is noted that the effectiveness of a structure made of polymer composite materials is provided by various methods, methods and technical means of metrology. The structure of a complex of studies aimed at developing the concept of metrological support is discussed, the first point of which is to analyze the types of metrological characteristics and the scope of work to determine them at the main stages of the existence of composite structures of aircraft aggregates of the transport category. Based on the analysis of numerous publications on the problem of metrological support of the main stages of creating technical products, the main types of measurements of the metrological characteristics of composite structures of aircraft aggregates of the transport category have been established, and the composition of the nomenclature of works on metrological support of the main stages of the existence of these structures has been determined. 12 main types of measurements of parameters have been identified, on which the whole variety of production physical quantities and the description of the properties and characteristics of structures of aircraft aggregates made of polymer composite materials are based. The composition of the main works on the metrological support of the four stages of the existence of the aircraft is revealed: design, production, operation and disposal of composite structures formed into systems of sequential blocks for performing these works. It is shown that the tasks of metrological support at the facility manufacturers should be solved during the technological preparation of serial production and testing of the installation series of products, and also take into account the peculiarities of aircraft operation and disposal of composite structural elements in terms of work safety and economic efficiency of their results. An enlarged sequence has been established for organizing work on metrological support for measuring the properties of composite structures of aircraft aggregates at aviation enterprises. The results presented in the first approximation provide a solution to practically important aspects of the problem under discussion.

scholarly journals Impact Properties of Nanomodified Basalt Fiber Reinforced Polymer Composites

2019 ◽  
Vol 9 (1) ◽  
pp. 5839-5844
Keyword(s):  
Polymer Composite ◽  
Impact Load ◽  
Basalt Fiber ◽  
Optical Microscope ◽  
Fiber Reinforced Polymer ◽  
Low Velocity Impact ◽  
Fiber Reinforced ◽  
Basalt Fibre ◽  
Reinforced Polymer ◽  
Basalt Fiber Reinforced Polymer

Basalt fibre reinforced polymer composite is a newly versatile material that has good potential to be used in many applications due to its high specific modulus and strength properties. This paper is aimed to evaluate the response and properties of BFRP composite when it is subjected to low-velocity impact loading. The BFRP laminates were fabricated using vacuum bagging method. The effects of 5, 10 and 15wt% nanosilica particles on density, impact load and energy absorbed were investigated using a drop weight impact test. The damage characteristics of the samples were examined using an optical microscope. The addition of 15wt% nanosilica into Basalt fiber reinforced polymer composite significantly improved the energy absorption properties of the specimens. This suggests that the nanomodified BFRP composite has better damage resistance properties when compared to the pure system.

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