Two different test systems were designed to evaluate the tribological behavior of five engineerin... more Two different test systems were designed to evaluate the tribological behavior of five engineering plastics (Polyamide-PA grades and Ultra High Molecular Weight Polyethylene-UHMW-PE) and a fully degradable bio-composite (Polylactic Acid-PLA/hemp fibers) targeted to agricultural machinery abrasive conditions. Pin-on-plate tests were performed with different loads, sliding velocity and abrasive particles. The material response was further investigated in a slurry containing abrasive test system with different sliding velocities and distances, abrasive media compositions and impact angles. The abrasive wear, the change of the 3D surface roughness parameters, the friction force and contact temperature evolution were also analyzed as a function of the materials' mechanical properties (H, E, σ y , σ c , ε B , σ F , σ M) and the dimensionless numbers derived from them. Using the IBM SPSS 25 software, multiple linear regression models were used to statistically evaluate the measured data and to examine the sensitivity of the material properties and test system characteristics on the tribological behavior. For both test setups, the system and material characteristics influencing the dependent variables (wear, friction, heat generation) and the dimensionless numbers formed from the material properties were ranked using standardized regression coefficients derived from the regression models. The abrasion sensitivity of the tested materials were evaluated taking into account a wide range of influencing parameters.
IOP Conference Series: Materials Science and Engineering
To improve the performance of the Agricultural machinery, several composite materials were sugges... more To improve the performance of the Agricultural machinery, several composite materials were suggested as replacements of critical fast-wearing steel parts. Three possible replacements were selected (PA6E, PA6G, and PA66GF30) and examined by a pin-on-plate system with sliding abrasive cloths. The results were compared according to the pin-on-plate system with a combined property (H/E) of these materials. Then to see how the friction affected these specimens, 3D microscopic photos of the worn surfaces were taken. As results, an inverse relationship between the wear rate and H/E property for these materials, an increasing of H/E factor leads to a decrease in the wear rate. While for the 3D microscopic PA6G was the most outstanding worn surface.
Friction which happens between plants and soil particles with the agricultural machine parts lead... more Friction which happens between plants and soil particles with the agricultural machine parts leads to substantial losses due to wear these parts. Nowadays, polymer matrix composites are playing a great role as a replacement of some critical fast-wearing steel due to their high properties, and this replacement leads to increase the machine reliability besides better corrosion resistance and lighter construction. Five types of composite materials were suggested to replace these steel parts. We chose ESD PA6 G, HD1000, PA6E, PA6G and PA66GF30 as test materials. And two kinds of testing methods were done to test these materials. First one is a pin-on-plate test with sliding abrasive clothes, the second one is a sand slurry test which uses standard abrasive particles. In the pin-on-plate abrasive wear system, we found that PA6G was the best choice of the used polymers because it had the lowest wear rate.
International Journal of Engineering and Management Sciences
To choose the proper material for agricultural machinery we tested several materials with abrasiv... more To choose the proper material for agricultural machinery we tested several materials with abrasive cloth on the pin-on-plate test device. After having the pre-results, we launched more complex abrasive testing (slurry-pot) simulating more realistic mode with soils to investigate the abrasive wear mechanism and resistance of the selected up-to-date polymeric structural materials. for this, we developed a modified slurry-pot test machine that ensures the comparability of the materials over a wide range of conditions. Through this device, several parameters could be controlled like speed, the soil particle’s hit angle on the tested surface.
Two different test systems were designed to evaluate the tribological behavior of five engineerin... more Two different test systems were designed to evaluate the tribological behavior of five engineering plastics (Polyamide-PA grades and Ultra High Molecular Weight Polyethylene-UHMW-PE) and a fully degradable bio-composite (Polylactic Acid-PLA/hemp fibers) targeted to agricultural machinery abrasive conditions. Pin-on-plate tests were performed with different loads, sliding velocity and abrasive particles. The material response was further investigated in a slurry containing abrasive test system with different sliding velocities and distances, abrasive media compositions and impact angles. The abrasive wear, the change of the 3D surface roughness parameters, the friction force and contact temperature evolution were also analyzed as a function of the materials' mechanical properties (H, E, σ y , σ c , ε B , σ F , σ M) and the dimensionless numbers derived from them. Using the IBM SPSS 25 software, multiple linear regression models were used to statistically evaluate the measured data and to examine the sensitivity of the material properties and test system characteristics on the tribological behavior. For both test setups, the system and material characteristics influencing the dependent variables (wear, friction, heat generation) and the dimensionless numbers formed from the material properties were ranked using standardized regression coefficients derived from the regression models. The abrasion sensitivity of the tested materials were evaluated taking into account a wide range of influencing parameters.
IOP Conference Series: Materials Science and Engineering
To improve the performance of the Agricultural machinery, several composite materials were sugges... more To improve the performance of the Agricultural machinery, several composite materials were suggested as replacements of critical fast-wearing steel parts. Three possible replacements were selected (PA6E, PA6G, and PA66GF30) and examined by a pin-on-plate system with sliding abrasive cloths. The results were compared according to the pin-on-plate system with a combined property (H/E) of these materials. Then to see how the friction affected these specimens, 3D microscopic photos of the worn surfaces were taken. As results, an inverse relationship between the wear rate and H/E property for these materials, an increasing of H/E factor leads to a decrease in the wear rate. While for the 3D microscopic PA6G was the most outstanding worn surface.
Friction which happens between plants and soil particles with the agricultural machine parts lead... more Friction which happens between plants and soil particles with the agricultural machine parts leads to substantial losses due to wear these parts. Nowadays, polymer matrix composites are playing a great role as a replacement of some critical fast-wearing steel due to their high properties, and this replacement leads to increase the machine reliability besides better corrosion resistance and lighter construction. Five types of composite materials were suggested to replace these steel parts. We chose ESD PA6 G, HD1000, PA6E, PA6G and PA66GF30 as test materials. And two kinds of testing methods were done to test these materials. First one is a pin-on-plate test with sliding abrasive clothes, the second one is a sand slurry test which uses standard abrasive particles. In the pin-on-plate abrasive wear system, we found that PA6G was the best choice of the used polymers because it had the lowest wear rate.
International Journal of Engineering and Management Sciences
To choose the proper material for agricultural machinery we tested several materials with abrasiv... more To choose the proper material for agricultural machinery we tested several materials with abrasive cloth on the pin-on-plate test device. After having the pre-results, we launched more complex abrasive testing (slurry-pot) simulating more realistic mode with soils to investigate the abrasive wear mechanism and resistance of the selected up-to-date polymeric structural materials. for this, we developed a modified slurry-pot test machine that ensures the comparability of the materials over a wide range of conditions. Through this device, several parameters could be controlled like speed, the soil particle’s hit angle on the tested surface.
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