Search results

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

According to the deep analysis of material's mechanical properties test data, the author makes a study on the strength mechanism of the concrete material.
However, due to the varieties in material production process and material shape as well as the influence of the mechanical properties and aggregate size, the strength mechanism of them is different.
The development process of failure modes and mechanical factors in all periods (the rising period, the declined curve unable to measure because of loading equipment) are similar to ordinary concrete.
When filled with high fluidity self-compacting concrete, it will rely on the interface bonding to ensure its overall mechanical properties.
The results show that, The large size aggregate self-compacting rock-fill concrete remains essentially is concrete, thus, compared with formal concrete, mechanical properties of it shows some similarity.

It is shown that the external (outer) surface layers that form around disperse filler particles is one of the factor responsible their mechanical properties.
A solution of this problem requires comprehensive investigations of the structure and properties of epoxycomposite materials, methods of improving mechanical characteristics, study of the effect of operating conditions on the behavior under loading [4, 5].
Niihara, Mechanical property improvement of carbon fiber reinforced epoxy composites by Al2O3 filler dispersion, Mat.
Asi, Mechanical properties of glass-fiber reinforced epoxy composites filled with Al2O3 particles, Journal of Reinforced Plastics and Composites 28 (2009) 2861-2867
Psakhie Modeling mechanical behaviors of composites with various ratios of matrix-inclusion properties using movable cellular automaton method, Defence Technology 11 (2015) 18-34.

The best choice to use the correct properties is that we measure them by ourselves.
A great number of experimental techniques have been developed to determine material properties.
The static elastic properties are determined from the stress-strain curve.
Table 1 shows the material properties of the specimens.
The main factors affecting the use of the measured vibro-acoustic signals which is the noise content have been eliminated by using Z-stem filtering technique.

Introduction Vibration problems exist widely in engineering practice, factors such as earthquakes, wind load, mechanical high speed operation, etc will lead to different degrees of building structure vibration.
Principles and mechanical properties of fluid viscous damper Structure and energy dissipation principle of rod type viscous fluid damper.
Therefore, the discussion of the vibration properties of energy dissipation structure is required to establish realistic mechanical model.
Therefore, “can damping force be larger” is affected by supporting stiffness K.
Therefore, the phase of damping force and velocity is affected by supporting stiffness K.

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.

The rheological properties of special self-compacting concrete paste played a major role on its performance.
Therefore, under certain conditions, it can be simplified to the study of rheological properties of cement paste.
In this paper, by using R/S-SST rheometer produced by American Brookfield company continuous online detection of ultra low speed, with the yield stress changes over time to characterize the development and change of cement paste structure after mixing water, and the rheological properties model of cement paste through time was established, combined with the hydration heat curve test, discussed the control factors of rheological properties of loss with time.
Cement initial rheological properties is associate with cement hydration heat characteristics, structure formation and development, physical and mechanical properties.
Marsh, Properties and treatment of rotary mud, petroleum development and technology, Transactions of the AIME, (1931) 234–251

Saunders [2] considered that the formability of TWBs mainly depends on the weld-line’s moving distance, and the weld-line movement mainly depends on the influence of the boundary conditions and material properties.
Zhou jie [4] et al. were studied the weld-line movement with different thickness combination or different strength combination during forming process, it is concluded that the mechanical properties of the base metal play an important role with the draw bead, but without the draw bead, different strength combination of the base metal play a leading role.
So what other factors affect the weld-line movement during the forming process and how they influence the movement are questions deserving research.
Analyzing the influence factors of square cup The orthogonal experiment arrangement and results There are many factors affect the square cup’s weld-line movement during the stamping process, each set of factors contain a lot of levels, if have a comprehensive test, will encounter excessive number of trials and other issues.
(c) (b) (a) (f) (e) (d) Fig. 3 The relationship between the influence factors and the target value 3.

Introduction With the in-depth research on rock dynamic mechanical, it is found that the mechanical properties of the rock under dynamic loading are significantly different from the static loading of the mechanical responses.
The experiment result of rock materials in impact loading mechanical properties is study of rock structure.
Meanwhile, the mechanical properties of rock material also depended on the external loading condition, such as loading rata, magnitude of load and coupling conditions.
The rock will be influenced by various physical or chemical fluids so that its own mechanism of organizational structure will be destroyed, and its physical and mechanical properties will be affected.
Vol.2 (1984), P.1-9 (in Chinese) [2] Litian Xin, Xiang He and Min Su: Mechanical properties of rock under impact loading.

The requirement of chemical compositions and physical properties of 9Ni steel is shown in Table 1 and Table 2.
Fig. 6 The result of maximum hardness test Matched Welding Consumables of 9Ni Steel To selecting matched welding consumables for general commercial steels, several factors should be considered as follows. 1) Excellent weldability. 2) Chemical compositions similar to that of base metal to avoid the various problems caused by dissimilar metal welding; 3) Mechanical properties equal to that of base metal; 4) Same level of Special properties of base metal (such as wear resistance and corrosion resistance).
Compared with CVN test, CTOD test has the following advantages: 1) CTOD can evaluate the toughness of welded joints more precisely; 2) CTOD results can directly demonstrate the toughness at the crack tip; 3) CTOD can reveal how the factors such as the residual stress, the geometry of weld joints, and etc, influence the toughness.
References [1] LI Jianmin, WANG Peizhan, LIU Dongfeng, Investigation on Microstructure and Mechanical Properties of 9Ni Steel for LNG Storage Tank during Service, Journal of Taiyuan University of Technology
[2] YANG Yue-hui, CAI Qing-wu, WU Hui-bin, Effect of quenching, lamellarizing and tempering process on properties of 9Ni steel, TRANSACTIONS OF MATERIALS AND HEAT TREATMENT. 30(3:2009)92-95