Search results

Influence Factors of Reheat Crack Chemical Composition of Material.
The increased thickness of joint has obvious effect on the reheat cracks for both metallurgical factors and mechanical factors. 1) Reduce the material toughness and the critical plastic deformability of welded joint [28]. 2) Increase HAZ strain with the increased welding layer [9]. 3) Increase residual stress of joint for increased temperature difference during PWHT [29].
Problems Needing Further Researches Reheat Cracking Mechanism and Influence Factors of Steel T23.
Systematic research on the influence of increased wall thickness on the metallurgical and mechanical factors of reheat crack occurrence will contribute to the development and optimization of welding process and obtain widely applicable measures for mitigating reheat cracks in the joint of thick-walled weldment.
T/P23, 24, 911 and 92, New grades for advanced coal-fired power plants—Properties and Experience, Int.

The results showed that the spinning technology with suction groove can be significantly improved ramie yarn properties: hairiness and breaking strength etc.
Four factors and three levels orthogonal test analysis method is adopted for compact yarn.
Yarn properties are compared and analyzed between conventional yarn and compact yarn, for example: hairiness, breaking strength, elongation etc.
A B C D Y Spindle speed r/min Twisting T/m Negative pressure /kPa Traveler /# Hairiness index of 4mm length 1 1 1 1 1 15.12 2 1 2 2 2 18.48 3 1 3 3 3 19.91 4 2 1 2 3 19.17 5 2 2 3 1 23.32 6 2 3 1 2 23.77 7 3 1 3 2 19.95 8 3 2 2 3 22.58 9 3 3 1 1 19.09 Range analysis In the Table 3, the spindle speed and twisting are the most important factor affecting the condensing effect and has the most obvious effect on yarn quality.
The negative pressure and traveler are general factor, but there is little difference among them.

This oversight could lead to under or over-conservatism in design predictions, affecting the reliability and economic viability of UHPC structures.
Several critical factors must be considered when evaluating model uncertainty in capacity models.
=Maximum This statistical description includes minimum, maximum, and quartile values for UHPC geometric properties like beam depth and width, as well as material properties such as fiber volume percentage and compressive strength.
A simple linear regression analysis between the bending capacity Mc the influential basic variables revealed some preliminary insights into factors affecting the flexural capacity of UHPC elements.
Azizinamini, “Experimental and numerical study on mechanical properties of Ultra High Performance Concrete (UHPC),” Constr.

Austenite grain size is an important microstructure parameter when processing steels as it provides the initial condition for the austenite decomposition that determines the final microstructure and thus properties of the steel.
The laser-ultrasonic system is attached to a Gleeble 3500 thermo-mechanical simulator.
As indicated in Fig. 6, introducing a correction factor of 1.5 to the C-Mn steel calibration mitigates this problem.
For example, grain growth is markedly affected when precipitates dissolve.
The increased amount of solutes in the matrix affects the elastic constants and this may be recorded with the velocity data.

Ti-6Al-4V has wide range of application in alloys due to its superior mechanical properties such as corrosion resistance, high tensile strength and toughness.
The variations of the parameters affecting the cutting quality concludes the surface integrity [14].
Table 2: Control factors of WEDM Parameter Unit Test I Test II Pulse-off time µs 1 5 Peak current Ampere 4 6 Wire tension N 6 16 Wire feed mm/min 4 12 Surface Characterization.
Copper increases the hardness of titanium and the existence of zinc has no effects on the mechanical properties.
Weaver, “Crystallography, Compositions, and Properties of White Layer by Wire Electrical Discharge Machining of Nitinol Shape Memory Alloy,” Mater.

Under a simple and economical condition, PVB with 14.2% of butyraldehyde group and good alcohol-solubility were prepared, the PVB film forms quickly after the volatilization of ethyl alcohol, and it has good diaphaneity, high tensile strength, and excellent mechanical properties.
As literature shows the physical and chemical properties of PVB such as solubility, miscibility, solution viscosity, mechanical properties, and the reaction capability with other reactants are connected with the composition of above three groups.
The mechanical properties are also excellent that the highest tensile strength of the PVB film can reach 50.9MPa.
Conclusions It confirmed that butyl aldehyde was an important structural factor which affected alcohol-soluble of the PVB in this experiment.
The PVB film forms quickly after the volatilization of ethyl alcohol, and it has good diaphaneity, high tensile strength, and excellent mechanical properties.

The main negative factors that affected the compressive strength of CM containing RAP as a fine aggregate replacement are revealed.
The development of mechanical properties of cement mortar modified with asphalt is important for the subsequent construction steps and volume stability of ballastless track structures.
Table 1 Properties of aggregates.
The influence factors studied were the mix proportions (RAP replacement, water to cement ratio) and curing time.
Burdette, Mechanical properties of concrete containing recycled asphalt pavements, Mag.

Factors such as center of gravity, wheelbase geometry, and weight distribution must be carefully considered to ensure safe maneuvering, especially during cornering or on inclined surfaces [17, 18].
This center can be located based on the distance from the rear axle and is essential for ensuring stability and proper balance. 2.6 Strength and Material Properties.
Static Structural analysis of aluminum alloyed tricycle body Tables 1 and 2 shows the simulated capacity of the aluminum alloy for the body of the tricycle, and the properties of aluminium respectively Table 1.
Simulated capacity of the aluminum alloy for the body of the tricycle Property (units) Minimum Maximum Average Deformation (mm) 0 7.6677 × 10-5 1.2793 × 10-5 Stress (Pa) 1.0701 1.7211 × 104 1.1882 × 103 Strain (mm/mm) 5.4236 × 10-11 2.5615 × 10-7 1.8064 × 10-8 Safety factor 15 15 15 Table 2.
Journal of Mechanical Engineering and Automation, 9(2), (2019) 47–53

Plasma treatment, well known as a dry process with less or without waste water or wet chemicals, can be used to modify surface fabrics in the nanometer scale, range from several hundred to several thousand angstroms, without affecting their bulk properties. [2] Many kinds of gases can be used in plasma process such as Ar, O2, N2, CO2, etc. [3-6] Ions and neutral species in plasma would collide with the molecules on the surface lead to chemical interaction with surface molecules, generating new functional groups and radicals.
Tensile strength is a mechanical property to measure the maximum force that material can withstand before rupture.
Considering the weight loss results in last section, although changing in tensile properties might result from the effect of increasing in fiber-to-fiber friction due to increased roughness, it is more reasonable to believe that the loss of material are responsible for strength reduction.
The elongation at break of the fiber is also an indicator on the durability of the fabric and is an important factor which associated with the tensile properties.
The exposure time plays an important role in the change of mechanical properties of fabric while the operating pressure having less prominent effects.

Power and Dissipation Factor measurement are done to investigate the insulator properties, winding and bushing conditions [21][22].
Accuracy- Power and Dissipation Factor measurement, Common Electrical Tests, and FRA are regularly used to point out the abnormalities from the core, winding and bushing for mechanical deformation detection.
Ghani, “Parameters Affecting the Lifetime of Transformer Oil in Distribution Transformers : Parameter Monitoring of 50 Transformers from the Athens Area,” no.
Liso, “Research of electrophysical properties of oil-paper insulation,” IEEE, no. 1, pp. 0–3, 2014
Onal, “A Study for Examining Dissipation Factors of Various Insulations and Test Transformers in the Wide Range of Frequency,” vol. 5, no. 5, 2012