Search results

Introduction New developments in advanced high strength steels (AHSS) have helped to reduce weight, improve fuel efficiency, and increase the crashworthiness of vehicles through enhanced mechanical properties [1].
However, to obtain reliable spot welds, the parameters affecting and its relationship with the quality of spot welds is very much essential.
Experimental work From the trials done in our laboratory; the predominant factors which are having greater influence on quality of resistance spot welds were identified.
These are the primary process parameters contributing to the heat input and subsequently influencing the tensile shear properties of resistance spot welded DP980 steel joints.
Chen, The Effects of welding parameters on mechanical properties and microstructure of resistance spot welded DP600 joints, J.

The Study on Deposition Process and Mechanical Properties of Deposited Cu Thin Films Using Molecular Dynamics Jen-Ching Huang 1, 2 a, Yi-Chia Liao3, Huail-Siang Liu3 and Fu-Jen Cheng4 1 Department of Mechanical Engineering, Tungnan University, Taiwan 2 Research Center for Micro/Nanotechnology, Tungnan University, Taiwan 3 Institute of Mechanical Engineering, Tungnan University, Taiwan 4 Department of Electrical Engineering, Tungnan University, Taiwan a jc-huang@mail.tnu.edu.tw Keywords: Deposition Process, Young's modulus, Surface roughness, Copper, Molecular dynamics.
This paper studies the deposition process and mechanical properties of Cu thin films deposited on single crystal copper substrates with various surface roughnesses by molecular dynamics (MD).
Therefore, the substrate temperature and the substrate surface roughness were changed to study the influence of process parameters on the mechanical property of deposited Cu thin films.
Therefore, the attraction between atoms is an important factor in thin film formation.
a) b) c) Fig. 6 Surface morphology of Cu film of various deposition atoms (a) 512 atoms (b) 1024 atoms (c) 1536 atoms Conclusions This paper study the nanoscale mechanical properties of Cu thin films deposited on single crystal copper substrates with various surface roughness by MD.

To investigate the possible effects of the curing temperature on the mechanical properties of the Hysol 9466, two test series for this adhesive have been carried out.
The static tests for the two different kinds of curing of Hysol 9466 give the same elastic properties (elastic modulus E ≈ 1.99 GPa and proof stress Rp0.2 ≈ 52 MPa).
Dynamic scale factor - compression tests.
Fig. 5 shows the k factor as a function of the actual strain rate.
Dynamic scale factor - tensile tests.

The effects of the double combination box girder segment of the negative moment area structure stress properties.
Introduction Steel - concrete composite box girder structure, because of its excellent structure, reasonable layout, give full play to the mechanical properties of the steel tensile strength and compressive strength of concrete [1-2].
With the conduct and in-depth study of bridge construction, composite box girder negative moment area of the mechanical properties of the problem and stability [3], has become a key factor restricting the development of the large-span direction.
Therefore, when you investigate the effect of a combination of cross-section of the double negative moment area of the mechanical properties were compared under different additional thickness of the concrete floor, the lower flange on the bottom plate of concrete compressive stress sharing role and top concrete slab tensile stress lowering effect.
The discussion of the rationality of filling thickness must also be taken into account for the structural properties play an important role in the stability problems.

With fast development of output, light-weighting and high performance of automobile, 17Cr2Ni2Mo steel, as an important vehicle-used gear steel, has to improve properties to fulfill the development.
The performance of 17Cr2Ni2Mo steel is affected by quenching process parameters.
Introduction With fast development of output, light-weighting and high performance of automobile, 17Cr2Ni2Mo steel, as an important vehicle-used gear steel, has to improve properties to fulfill the development.
According to the functional model of key factors, the effect of key factors and their interaction to response values are analyzed quantitatively.
In order to research the effect of austenitizing temperature and holding time on the quenching hardness and tensile strength of 17Cr2Ni2Mo steel, the central composite design of two factors and five levels is carried out by using the austenitizing temperature and holding time as the design factors.

But due to the complexity of CT dimensional measurements, several influencing factors affect the accuracy of the method.
The precision and accuracy of dimensional measurements by CT are affected by several factors including the object of investigation and the measurement parameters.
One particularly significant factor related to the measured object is its surface quality, which plays a critical role in affecting the reliability of CT measurements.
Understanding its influence among other factors is essential for effectively utilizing CT in metrology.
Turgut, Experimental and statistical investigation of mechanical properties and surface roughness in additive manufacturing with selective laser melting of AlSi10Mg alloy, J Braz.

Finally, the sound absorption coefficient and mechanical properties of the samples were examined.
It can be seen that the incorporation of expanded perlite is detrimental to the improvement of the mechanical properties of the material.
After mixed with the material, it can absorb the water affecting its workability and thereby the strength will be decreased[2].
Therefore, admixtures should be not only selected from the perspective of improving the absorption properties and overall factors should be taken into consideration. 3.1.3 Microstructure analysis Fig. 4 shows the pore morphology of expanded perlite and ceramic within the samples observed by SEM.
From the figure, it can be seen that, the sample with foaming agent has most significant sound absorption property at the trough of the absorption coefficient curve for the material. 3.3.2 Mechanical properties Fig. 12 shows the bending strength and compressive strength of the above-mentioned two samples on the 28th day.

Theses findings show the main factors that affects the intake process and the results will be used as a baseline to improve the intake system.
It is known that a clean and efficient engine requires a lean fuel to air ratio, meaning a fuel to air ratio that is more than 1.0, because a lean fuel to air ratio allows for low throttling losses at part load, high compression ratio and favourable thermodynamic properties as the air combusts.
Studies have been done in finding the factors that affects the flow rate of the inlet system.
Desantes [3] found out that these factors are the pulsations of the pressure in the intake system, the residue from the combustion that is left and impedes the airflow, and the different surfaces and of the different parts in the inlet system.
The factors that are focused on are the different pressure, different valve opening and the different configuration of the inlet system.

Additionally, the microstructure of the solid phase related to neck growth and solid phase continuity strongly affects the mechanical properties [2-3].
Unfortunately, reports on the processing and mechanical properties of boride are very limited.
Mechanical properties and mechanisms.
This indicated that high compaction pressures improve the mechanical properties of porous TiB2 ceramics.
The high mechanical properties are related to the growth of the neck growth by surface diffusion in high temperature.

Aggregate is one of the key components in RMC to bear loads, its gradation design determines the overall mechanical properties of the composite directly.
How to minimize vibration during manufacturing process is now an important factor that affects machining precision.
Compared to cast iron and steel, RMC has ten times the vibration alleviating properties, which is suitable for machine tool bed.
As one of the key components in RMC to bear loads, the dosage of aggregate can be more than 85% of the total weight, its own mineralogy performance and skeleton structure corresponding to different aggregate gradation influence the mechanical properties of the composite directly.
Simulation of porosity In order to highlight the issue of aggregate gradation, some complicated factors originating from the heterogeneous property are minimized.