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Through the mechanical properties experiments and analyses of ordinary marine concrete and marine concrete with fly ash added, it was thought that the proper content of SAP added could release free water for cement particles to continue hydrating during the curing stage, guarantee adequate water.
Fig. 1 Water absorption and release demonstration of SAP Compared with concrete of land, marine concrete which was used in sea water environment would suffer from the stress of mechanics, frost, wind, seawater and other natural factors, it was easy to fail.
Experiments of appropriate content of SAP added of marine concrete 2.1 Mechanical performance experiments of ordinary marine concrete First, the amount of cement was set at 360kg/m3, sand rate was 37%.
When pore water was drained, the relative humidity of internal cement slurry would be changed, thus affecting the continuation of cement hydration directly.
So, fly ash added would affect the strength development when SAP added, leading to the appropriate content of SAP were different from ordinary marine concrete.

Straightening process is a nonlinear process, and affected by many factors.
But many internal or external factors may be the direct cause of deformation of metal bars.
In this study, an expert system is developed for the prediction of stroke for precision straightening based on the previous research. [1, 2] Straightening Technology of Expert System Straightening process is a nonlinear process, and affected by many factors.
But in the process of theoretical calculation, application of simplified calculation and the uncertainty of material properties would greatly limit the accuracy of the mathematical model.
The property of material and parameters can be obtained as follows: The elastic modulus E = 190089 MPa, yield stress σt = 382MPa, and span 2l = 200 mm, and the cross section is shown as Fig.6.

The front billet temperature is found to be the most significant factor affecting the variation.
Introduction The mechanical and geometrical properties of extruded aluminum sections depend on a number of parameters in the extrusion process, including flow and temperature evolution in the container and die.
Simulation models, which achieve sufficiently accurate quantification of the flow conditions in the container and die, can be very useful tools when understanding how to control problematic effects on shape and mechanical properties.
Three level factorial design with three factors, front billet temperature (ºC), billet taper (ºC/billet length), and ram speed (mm/sec) was implemented.
There is also a direct relationship between the temperature and the material properties of the extruded section.

But the process of the metal wear is complicated because of the characteristics of the influenced factors[2-5].
The main factors that affect the wear performance are choosed from the point of environmental factors, working conditions and material properties.
The factors include PB value of the lubricant ,which is the main character of the lubricant of resisting wear ;the hardness (H)of materials ,which can represent the surface property of the parts; the load(P) and velocity (v)of the samples, which determine the working condition of the samples.
As there four main factors are considered ,so the prediction modal includes four variables and the wear volume is the dependent variable.
As we know that there is interactive effect between the influencing factors ,so the relation set (Eq.2) is needed in order to establish the function between mean wear volume and the four factors

The benefit of the numerical process modelling is to reduce the expensive production trials and to provide understanding of the most important factors affecting the metallurgical industrial processes.
To achieve correct temperatures, the effective heat transfer coefficient (EHTC) and emissivity factor must be accurate.
Emissivity factor tests were carried out in the same manner but without rolling, air cooling only.
Material mechanical properties at rolling temperatures were determined by Gleeble™ thermo-mechanical simulator and IDS thermodynamic-kinetic-empirical software.
Archives of Civil and Mechanical Engineering, (2022) 22(3), 1-17

Mechanical Vibration 28.
Changes Heating effect on material of metal mesh If we reduce heating effect, then this may avoid expansion caused by heating but may cause material to be heated insufficiently 30: Object-affected harmful factors (Reduce heating effect) 39: Productivity (Material heated insufficiently) *22 Blessing in disguise 35 Parameter Changes 13 The other way round **24 Intermediary/ Mediator Material distorted unevenly Material expand unevenly Impurities in material If we remove the impurities problem, then there will be less misalignment but this incurs higher cost and disrupts production. 30: Object-affected harmful factors (Remove impurities in material) 39: Productivity (Disrupt production) 22 Blessing in disguise 35 Parameter Changes 13 The other way round 24 Intermediary/ Mediator Uneven temperature inside the furnace If we control the heat distribution in the furnace then material expands evenly but some monitoring system need to be used which slow down productivity 17: Temperature
(Controlled heat distribution) 39: Productivity (Slow down productivity) 15 Dynamics 28 Mechanical substitution 35 Parameter Changes Heating effect on semi- processed materials If we reduce heating effect, then this may avoid expansion caused by heating but may cause material to be heated insufficiently 30: Object-affected harmful factors (Reduce heating effect) 39: Productivity (Material heated insufficiently) 22 Blessing in disguise 35 Parameter Changes 13 The other way round 24 Intermediary/ Mediator Vibration of the metal mesh belt Imbalances of the conveyor belt moving mechanism If we remove the imbalances of the moving conveyor mechanism then it will be more stable but the conveyor will be more complicated (high cost). 14: Stability of the object (Remove imbalances) 36: Device Complexity (the conveyor will be more complicated) 2 Taking Out 35 Parameter changes 22 Blessing in Disguise Metal mesh conveyor belt and material have different expansion properties
The fixtures will be designed to fix the semi-processed material from misalignment by preventing the metal mesh conveyor belt from expanding unevenly as well as insulate or counteract the heated air from affecting the metal mesh conveyor belt.
The fixture material should not be affected by heat.

Mass of the specimens is the factor that affected the density and the mass is decrease with the increasing of fiber content.
Mechanical Properties and Fracture Behaviour of Coconut Fibre-Based Green Composites.
Materials and Mechanical Properties of Pretreated Coir-based Green Composites, Composites:Part B, 40, 633
Mechanical and dynamic properties of coconut fibre reinforced concrete.
Improvement of the mechanical properties of jute fiber reinforced cement mortar: A statistical approach.

Moreover, it is assumed that the materials of the base metal and weld metal have the same mechanical properties.
Herein, the MD model is simplified to Fe-C alloy system since Fe and C atoms are the major determinants affecting the mechanical properties of carbon steel.
The standard outputs of simulations include the mechanical properties and the atomic structure evolution in failure process.
Results and Discussion The Mechanical Properties of Various Microregions.
The decrease of mechanical properties of materials shows a time effect.

Introduction Because of excellent mechanical properties, Cu-20Ni-20Mn alloy are widely used in many industries, such as mining industry and electrical equipment [1].
However, the grain will grow up during solution heat treatment, which results in the changes of the mechanical properties.
Mechanical behavior.
According to their result, the value of kHP is generally affected by texture.
Mackay, Optimization of the solution heat treatment process to improve mechanical properties of 319 Al alloy engine blocks using the billet casting method.

Surface roughness influence the performance of mechanical component and production cost because its affects factors such as friction, tolerance and more [7].
These high quality epoxy resin bonded glass fabric laminates offer very high mechanical strength and low moisture absorption, combined with excellent electrical properties, under both dry and humid conditions.
The dimension of the workpiecesis 30 mm x 300mm.The mechanical property of e glass fiber is tabulated in Table 1.
Table 1.PROPERTIES OF GFRP PROPERTIES GFRP DENSITY 2.6 g/cm3 TENSILE STRENGTH 3400MPa MODULUS OF ELASTICITY 73000 THERMAL COEFFICIENT 5x 10-6/°C SOFTENING TEMPERATURE 850 °C Fig 1.
The surface roughness are mainly affected by feed rate.