It has been suggested that different polymerisation methods, as well as the addition of glass fibre (FV) might improve the hardness of acrylic.Materials and methods: Five types of acrylic resin were tested: Vipi Wave (VW), microwave polymerisation; Vipi Flash (VF), auto-polymerisation; Lucito...
Specific gravity determined in the laboratory varied between 0.98 and 1.1, and an average of 1.05 was used. Proctor density in dry condition amounted to 0.64 g/cm3. Hardness was determined using the Shore durometer scale (Shore A). The results from fifteen smoothed surface rubber pieces tested ...
1).LEJIA produce bending tools from high speed steel high quality steel(42CrMo=SCM440=42CrMo4=4140), working surfaces are preciously grounded, standard will be whole body Total Hardening, the hardness can reach HRC47; 2).We can do surface hardening on...
ASTM D5731 (2001c) Standard method for determination of the point load strength index of rock. American Society for Testing and Materials ASTM D5873 (2005) Standard test method for determination of rock hardness by rebound Hammer method. American Society for Testing and Materials ASTM D3967 (200...
In summary, with the large differences in the cultivation methods of postgraduate students of different qualification types, the impact on students may vary in different aspects. Up to now, few researches have explored the impact of the pandemic on the learning activities of postgraduate students ...
In summary, with the large differences in the cultivation methods of postgraduate students of different qualification types, the impact on students may vary in different aspects. Up to now, few researches have explored the impact of the pandemic on the learning activities of postgraduate students ...
When viewed as an ensemble training method, it samples a much richer set of architectures than >existing methods such as dropout or stochastic depth. We propose a parameterization that reveals connections to exiting >architectures and suggests a much richer set of architectures to be explored. We ...
Given that the strength and hardness of the PDC core bit are significantly superior to those of the rock, we assume the bit to be rigid and neglect wear during the drilling process; (2) The rock is considered a continuous, homogeneous, isotropic elastic–plastic medium, and the temperature ...
Additionally, frequency effects due to strain rate and environmental influences need to be considered in all high frequency testing methods. However, compared with other high frequency testing techniques, ultrasonic testing is the most suitable method for investigations in the VHCF regime [7]. In the...
Chocolate exhibits a complex material response under the varying mechanical loads present during oral processing. Mechanical properties such as Young’s modulus and fracture stress are linked to sensorial attributes such as hardness. Apart from this link with hardness perception, these mechanical properties...