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Online since: March 2017
Authors: Leslie Joy L. Diaz, Stella Marie Hagad, Peter June M. Santiago
Properties of composite materials are often predicted from properties of its component materials.
This becomes a challenge with natural fibers because of its tendency to exhibit variability in properties that is caused by different factors [1].
Properties of the Abaca Fiber.
For an improved assessment of the mechanical properties of the fiber, Weibull analysis was performed using three different gauge lengths, i.e. 15 mm, 25 mm and 35 mm, obtained from the previously determined useful length and tensile strength distribution are shown in Fig 3.
Properties of the Abaca-fiber Reinforced Composite.
This becomes a challenge with natural fibers because of its tendency to exhibit variability in properties that is caused by different factors [1].
Properties of the Abaca Fiber.
For an improved assessment of the mechanical properties of the fiber, Weibull analysis was performed using three different gauge lengths, i.e. 15 mm, 25 mm and 35 mm, obtained from the previously determined useful length and tensile strength distribution are shown in Fig 3.
Properties of the Abaca-fiber Reinforced Composite.
Online since: February 2012
Authors: M.A. Azmah Hanim, M.Z. Shahrul Fadzli, T. Sai Hong, A. Aidy, R. Rohaizuan
So that, the properties of the candidate alloys for should be understand and must carefully apply these solders for high temperature applications step by step, in order to accomplish total lead free assembly [2].Furthermore, for high temperature solder, lack of research has been carried out to discover new alternative solder for high temperature application.
The factor that affects this phenomenon was the spallation of IMC layer.
For 97.5Bi-2.5Sb and 98.5Bi-1.5Sb solder alloys, no IMC layer formed and only mechanical joining existed at interface with some degree of mechanical grooving.
Keun : High-Temperature Lead-Free Solders: Properties and Possibilities.
Zong : Substrate Dissolution and Shear Properties of the Joints between Bi-Ag Alloys and Cu Substrates for High-Temperature Soldering Applications.
The factor that affects this phenomenon was the spallation of IMC layer.
For 97.5Bi-2.5Sb and 98.5Bi-1.5Sb solder alloys, no IMC layer formed and only mechanical joining existed at interface with some degree of mechanical grooving.
Keun : High-Temperature Lead-Free Solders: Properties and Possibilities.
Zong : Substrate Dissolution and Shear Properties of the Joints between Bi-Ag Alloys and Cu Substrates for High-Temperature Soldering Applications.
Online since: July 2008
Authors: Y.Q. Wang, Shi Chun Yang, Ming Rang Cao, Wen Hui Li, Sheng Qiang Yang
Li
e
College of Mechanical Engineering, Taiyuan University of Technology,
Taiyuan Shanxi 030024, P.
The relationships between MRR and these factors are also analyzed.
Therefore, the effects of non-electrical parameters such as thermophysical properties of workpiece material, liquid pressure, drilling depth and the tool rotation speed on MRR are discussed in detail.
Understanding and mastering these factors and rules help to provide theoretical guidance and reference for application of high-speed small hole EDM drilling.
Thermophysical properties of workpiece material used in this paper are listed in Table 2.
The relationships between MRR and these factors are also analyzed.
Therefore, the effects of non-electrical parameters such as thermophysical properties of workpiece material, liquid pressure, drilling depth and the tool rotation speed on MRR are discussed in detail.
Understanding and mastering these factors and rules help to provide theoretical guidance and reference for application of high-speed small hole EDM drilling.
Thermophysical properties of workpiece material used in this paper are listed in Table 2.
Online since: June 2017
Authors: Zhen Xue Shi, Jia Rong Li, Xiao Guang Wang, Xiao Dai Yue
Eq. 2 shows that the phase diagrams are based merely on thermodynamic parameters, while the kinetics factors are neglected.
This suggests that all the three single crystal superalloys have excellent mechanical Properties and practicability, which further proves aforementioned point.
That is because there are many papers and data about creep properties could be found.
The reasons are analyze as follows: (1) the calculation of JMatPro is based on the only thermodynamics principles rather than kinetics. (2) The actual creep properties of single crystal superalloys are also affected by practical conditions, such as device parameters, surface quality, orientation degrees, etc, and this kind of factors are not been considered in this article. (3) The data about ReneN5 is quite limited, which also influences the analyzing results.
Han, Effects of low angle boundaries on the mechanical properties of single crystal superalloy DD6, in: R.C.
This suggests that all the three single crystal superalloys have excellent mechanical Properties and practicability, which further proves aforementioned point.
That is because there are many papers and data about creep properties could be found.
The reasons are analyze as follows: (1) the calculation of JMatPro is based on the only thermodynamics principles rather than kinetics. (2) The actual creep properties of single crystal superalloys are also affected by practical conditions, such as device parameters, surface quality, orientation degrees, etc, and this kind of factors are not been considered in this article. (3) The data about ReneN5 is quite limited, which also influences the analyzing results.
Han, Effects of low angle boundaries on the mechanical properties of single crystal superalloy DD6, in: R.C.
Online since: February 2020
Authors: Jun Feng Li, Zhi Xuan Chen, Zhao Nan Wang, Zhong Feng Tian
Welding stress and welding deformation may cause cold cracks and other defects, which are also important factors affecting the reliability of welded structures and the accuracy of components [1-2].
Fig. 2 Mechanical boundary conditions of cylinders Fig. 3 Weld section morphology Simulation of welding temperature field and stress field is a highly non-linear process, thermal physical parameters and mechanical properties of metal material changed with the temperature, so it is necessary to adopt the material properties that change with the temperature.
The material properties involved in the thermal analysis of welding include: thermal conductivity, specific heat, linear expansion coefficient, young's modulus, yield limit, etc. [6-8] Fig.4 show the relevant properties of the material.
On the other hand, there are many influencing factors in the actual measurement of welding residual stress.
Mechanical Properties of Laser-MAG Hybrid Welding on Low Alloy High Strength Steel[J].
Fig. 2 Mechanical boundary conditions of cylinders Fig. 3 Weld section morphology Simulation of welding temperature field and stress field is a highly non-linear process, thermal physical parameters and mechanical properties of metal material changed with the temperature, so it is necessary to adopt the material properties that change with the temperature.
The material properties involved in the thermal analysis of welding include: thermal conductivity, specific heat, linear expansion coefficient, young's modulus, yield limit, etc. [6-8] Fig.4 show the relevant properties of the material.
On the other hand, there are many influencing factors in the actual measurement of welding residual stress.
Mechanical Properties of Laser-MAG Hybrid Welding on Low Alloy High Strength Steel[J].
Online since: December 2012
Authors: Shu Wen Wang, Te Li Su
In previous works, the effects of parameters of the needling process, the amount of needling, needle penetration, and needle arrangement, on the structure and properties of needled fabrics are discussed.
Results and Discussion The control factors and their level values must be determined prior to experiments.
This study selected the major processing parameters that affect the control factors of needlepunched nonwoven fabrics process, including the swing rate of the cross-lapper machine, the delivery rate of the cross-lapper machine, the depth of needle penetration, and the punch density.
The strength of the needlepunched nonwoven fabrics is a key factor affecting its applications.
The results of response table showed that the punch density was the significant factor affecting the tear strength of MD/TD and tensile strength of MD/TD of the needlepunched nonwoven fabrics.
Results and Discussion The control factors and their level values must be determined prior to experiments.
This study selected the major processing parameters that affect the control factors of needlepunched nonwoven fabrics process, including the swing rate of the cross-lapper machine, the delivery rate of the cross-lapper machine, the depth of needle penetration, and the punch density.
The strength of the needlepunched nonwoven fabrics is a key factor affecting its applications.
The results of response table showed that the punch density was the significant factor affecting the tear strength of MD/TD and tensile strength of MD/TD of the needlepunched nonwoven fabrics.
Online since: August 2022
Authors: Manish Kumar, Saroj Kumar Sarangi
They have a profound effect on the desire for mechanical properties continuously varying with position in certain directions.
Nowadays, carbon nanotubes (CNT) are extensively used for research work because it has exceptional mechanical and electrical properties.
Shen [5] studied the FGCNT reinforced composites and investigated their mechanical, thermal and electrical properties.
The mechanical properties of FGCNTRC were observed to be strongly depending on the reinforced materials in specific direction.
The values of CNT efficiency factors used in this research are as explained in Table 1.
Nowadays, carbon nanotubes (CNT) are extensively used for research work because it has exceptional mechanical and electrical properties.
Shen [5] studied the FGCNT reinforced composites and investigated their mechanical, thermal and electrical properties.
The mechanical properties of FGCNTRC were observed to be strongly depending on the reinforced materials in specific direction.
The values of CNT efficiency factors used in this research are as explained in Table 1.
Online since: March 2007
Authors: Song Xiao Hui, Xu Jun Mi
In
this study, we have selected Ti-6Al-2Zr-1Mo-1V (referred to as TA15 below), which has good
workability and excellent weldability as well as a mechanical property comparable to Ti-6-4 ELI, as a
medium-strength titanium alloy for investigation of its damage tolerance behavior.
Mechanical testing and examination of crack propagation rate are carried out along with metallographic observations to reveal the effect of heat treatment on the microstructure and properties.
Fig. 1 Microstructure of alloy plate with different heat treatments a)-treatment No.1; b) -treatment No.2; c) -treatment No.3; d) -treatment No.4 c) d) a) b) Shown in Table 2 and Fig. 2 are the mechanical properties of the TA15 ELI alloy following different heat treatment.
UTS/MPa YS/MPa EL/% RA/% aKU/J/cm 2 KIC(KQ)/ MPa m (T-L Orientation) 1 902 867 14 29 60 101.5 2 895 860 14 32 58 100.0 3 888 848 15 25 62 113.5* 4 883 845 13 26 59 114.0* *value of KQ Table 2 Mechanical properties of TA15 alloy with different heat treatments fracture toughness(KIC(KQ)≥100MPa m ).
Further researches of this alloy are necessary to elucidate the effect on its damage tolerance of such factors as different working processes (beta treatment etc.)
Mechanical testing and examination of crack propagation rate are carried out along with metallographic observations to reveal the effect of heat treatment on the microstructure and properties.
Fig. 1 Microstructure of alloy plate with different heat treatments a)-treatment No.1; b) -treatment No.2; c) -treatment No.3; d) -treatment No.4 c) d) a) b) Shown in Table 2 and Fig. 2 are the mechanical properties of the TA15 ELI alloy following different heat treatment.
UTS/MPa YS/MPa EL/% RA/% aKU/J/cm 2 KIC(KQ)/ MPa m (T-L Orientation) 1 902 867 14 29 60 101.5 2 895 860 14 32 58 100.0 3 888 848 15 25 62 113.5* 4 883 845 13 26 59 114.0* *value of KQ Table 2 Mechanical properties of TA15 alloy with different heat treatments fracture toughness(KIC(KQ)≥100MPa m ).
Further researches of this alloy are necessary to elucidate the effect on its damage tolerance of such factors as different working processes (beta treatment etc.)
Online since: November 2012
Authors: Chobin Makabe, Tatsujiro Miyazaki, Md. Shafiul Ferdous
Introduction
Fatigue failure is the dominant failure phenomena in various mechanical components that are subjected to cyclic loading even at below yielding stress.
The mechanical properties are: 449 MPa tensile strength, 283 MPa lower-yield strength, and 69% reduction of area.
The position of stop-hole affects slightly on the fatigue crack growth behavior.
Therefore, applying the stop-hole was not affect on the improvement of the fatigue life of the specimen with narrow width.
The stress concentration factor, Kt and stress intensity factor, KI was calculated to analyze the effect of stop-holes on fatigue crack growth behavior.
The mechanical properties are: 449 MPa tensile strength, 283 MPa lower-yield strength, and 69% reduction of area.
The position of stop-hole affects slightly on the fatigue crack growth behavior.
Therefore, applying the stop-hole was not affect on the improvement of the fatigue life of the specimen with narrow width.
The stress concentration factor, Kt and stress intensity factor, KI was calculated to analyze the effect of stop-holes on fatigue crack growth behavior.
Online since: July 2013
Authors: Zhe Nan Tang, Xiu Yun Du
The effects of various geometric parameters and thermal properties on the overall temperature have been analyzed.
Some work computed mechanical stress [3-4], electrical properties and reliability in structures.
Finite element simulations demonstrate that the presence of metal-filled TSVs influences thermal properties.
Since effects of BEOL and BCB are much significant to affect temperature distributions, two major parameters of material properties are selected as main factors to be analyzed, which are BEOL conductivity and BCB thickness.
Balasubramanian, et al, A study of thermo-mechanical stress and its impact on through-silicon vias, Journal of Micromechanics and Micro engineering. 18 (2008) 075018-075031
Some work computed mechanical stress [3-4], electrical properties and reliability in structures.
Finite element simulations demonstrate that the presence of metal-filled TSVs influences thermal properties.
Since effects of BEOL and BCB are much significant to affect temperature distributions, two major parameters of material properties are selected as main factors to be analyzed, which are BEOL conductivity and BCB thickness.
Balasubramanian, et al, A study of thermo-mechanical stress and its impact on through-silicon vias, Journal of Micromechanics and Micro engineering. 18 (2008) 075018-075031