Details
| Title | Materials Physics and Mechanics. – 2022. |
|---|---|
| Organization | Санкт-Петербургский политехнический университет Петра Великого ; Институт проблем машиноведения РАН |
| Imprint | Санкт-Петербург, 2022 |
| Collection | Общая коллекция |
| Document type | Other |
| File type | |
| Language | Russian |
| Rights | Свободный доступ из сети Интернет (чтение, печать, копирование) |
| Additionally | New arrival |
| Record key | RU\SPSTU\edoc\76107 |
| Record create date | 5/28/2025 |
| Network | User group | Action |
|---|---|---|
| ILC SPbPU Local Network | All |
|
| Internet | All |
|
- 2 A.B.D. Nandiyanto, S.N. Hofifah, S. Anggraeni.pdf
- CD = Wc/Vc, (1)
- RD =Wr/Vr, (2)
- RR = CD/RD, (3)
- (2) Percentage moisture content (PMC) was determined by calculating the initial mass of briquettes immediately after molding (W1), and the mass of briquettes after complete drying (W2)[45]. PMC is calculated with Eq. (4).
- PMC = [(W1-W2)/W2] X 100%. (4)
- (3) Water boiling test (WBT) is a test used to determine the efficiency of briquette combustion. It was carried out by burning the briquette sample, the heat from the combustion was used to boil 100 mL of water in a beaker. The increase in water tempe...
- (4) Burning rate (BR) is the combustion rate which was calculated by the ratio of the mass lost when combustion with the total time used [46], calculated using Eq. (5).
- BR =Q/T, (5)
- where Q is the mass of briquette burnt out (g) and T is the total burning time (min).
- (5) Specific fuel consumption (SFC) shows the ratio of the mass of the briquettes burned to the amount of water to boil [46] and it is determined using Eq. (6).
- SFC =Q/V, (6)
- where Q is the mass of burning briquettes (g) and V is the volume of boiling water (mL).
- (6) Percentage of water resistance index (PWRI) test was conducted by immersing the briquettes in water with a temperature of 27ºC for 30 seconds[47]. PWRI is calculated using Eq. (7) and (8).
- PWA = [(Q2-Q1)/Q1] X 100, (7)
- PWRI = 100% - PWA, (8)
- where PWA is the percentage of water absorbed, Q1 is the initial mass of briquettes (g), and Q2 is the final mass of briquettes (g).
- (7) Percentage of durability index (DI). To analyze DI, the mass of the briquettes was measured. The briquettes were put into a plastic bag, while the air in the plastic was removed. The briquettes were dropped from a height of 2 m onto a solid surfac...
- DI = Q2/Q1X100, (9)
- where Q1 is the mass before being put together (g), and Q2 is the mass after being dropped (g).
- (8) Mechanical test. To analyze the mechanical characteristics of the briquettes, we carried out a compressive test and a puncture test [29,28]. The compressive test was performed using a screw stand test instrument (Mode I ALX-J, China) equipped with...
- Effect of particle size
- Density. Figure 1(a) shows the density in terms of CD, RD, and RR of the briquettes under varying particle sizes. The CD value varied from 1.10 to 1.38 g/cm3. The highest CD value was obtained at the medium particle size of medium sizes. The lowest CD...
- Percentage moisture content (PMC). Figure 1(b) shows the results of PMC analysis on briquettes with different particle sizes. The PMC values ranged from 48 to 56%. Results showed that the relative moisture of the briquettes increased with the smaller ...
- Percentage of water resistance index (PWRI). PWRI is an analysis that shows the percentage of water content absorbed by the briquette with the effect of particle size (Fig. 1(b)). The highest PWRI was obtained for briquettes with large particles, whil...
- Percentage of durability index (DI). The sample showed good DI values ranging between 96.5 and 97.9% (Fig. 1(b)). The highest DI was obtained when using briquettes from small particles, while the lowest DI was obtained from large particles. The smalle...
- Burning rate (BR). Figure 1 (c) shows the effect of particle size on the BR of combustion. The BR value obtained ranged from 0.55 to 0.78 g/min. The largest BR was shown by the briquettes with large particles, and the smallest BR was indicated by the ...
- Variations of composition
- Density. Figure 2 (a) shows the CD, RD, and RR of the briquettes with varying particle sizes. The density is an important parameter that can affect the quality of briquettes. In general, higher densities result in better briquette quality [56]. The hi...
- Percentage moisture content (PMC). The PMC values ranging from 50 to 56% are shown in Figure 3 (b). The highest PMC value was obtained from briquettes with compositions of 50/50/30 and 60/40/30 and the lowest PMC values were obtained from briquettes w...
- Percentage of water resistance index (PWRI). The results of PWRI varied between 82 and 91% are shown in Fig. 3(b). The PWRI indicates the resistance of the briquette to the water. The good have high PWRI. Thus, they are not easily destroyed when absor...
- Burning rate (BR). The results of BR shown in Fig. 3(c) ranged from 0.55 to 0.84 g/min. The highest value was indicated by the material ratio of 10/90/30 and the lowest value was indicated by the material ratio of 50/50/30. The BR value is affected by...
- Specific fuel consumption (SFC). Based on Figure 2 (d), the SFC value varied between 0.066 and 0.097 g/mL. Briquettes with a larger ANS composition showed a higher SFC. The lowest SFC value was obtained at the variation of the raw material composition...
- Table 4 shows the results of the puncture test. The hard and compact briquettes make the needle more difficult to puncture so that the average puncture test result will be small. Conversely, briquettes that are not hard and porous make it easier for t...
- 7 A.N. Anoshkin, P.V. Pisarev et al..pdf
- 1. Introduction
- 7. Conclusions
- 8 D.I. Panov, X. Zhang, V.A. Spiridonov_et al..pdf
- 1. Introduction
- 2. Experimental setup and methodology
- 3. Results and discussion
- 4. Conclusions
- 12 G.F. Sarafanov, Yu.G. Shondin.pdf
- 1. Introduction
- 2. The model of unstable deformation in alloys
- 3. The Portevin-Le Chatelier effect
- 13 Puneet Bansal, Vandana Gupta.pdf
- 5. Boundary conditions
- 4. The energy ratios are numerically calculated and plotted graphically and sum of energy ratios of reflected, and transmitted waves and interference between transmitted waves is proved to be unity which shows that there is no dissipation of energy.
- 5. Significant effect of fractional orders and phase lag models has been observed on energy ratios.
- 6. This problem of reflection and transmission of waves has applications in many fields like geophysics, seismology, non-destructive evaluation, etc.
- Appendix 1
- MPM_2022_instructions.pdf
- Submission of papers:
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