Search results

Smith d Department of Mechanical Engineering, Imperial College London South Kensington, Exhibition Road, London, SW7 2BX, UK a y.kayamori@imperial.ac.uk, bs.hillmansen@imperial.ac.uk c s.crofton@imperial.ac.uk, droderick.smith@imperial.ac.uk Keywords: Ductile Crack Propagation, SENT Specimen, CTOA, Dynamic Fracture, Global constraint factor, finite element analysis Abstract.
On average, it was observed that higher crack speeds affected the constant values of the critical CTOA by slightly reducing them.
Load was applied at three different strain rates in order to evaluate the effects of strain rate and temperature on mechanical properties.
C Si Mn P S 0.14 0.19 1.33 0.017 0.003 where T is the absolute temperature, α and β are factors, ε � is the strain rate, and r0 is the strain rate-temperature parameter at a static strain rate and an ambient temperature. σ and σ0 are the yield stress or tensile strength at r and r0, respectively.
On average, higher crack speeds affected the constant CTOA by slightly reducing them, as shown in Fig. 6.

It reveals the mechanical behavior and the inherent law of the dam under different physical properties and different conditions of geo-grid.
It affects significant for the degree and direction of disturbance that based on the System-Mutation-Theory.
Mechanical Properties and Layout Scheme of Geo-grid The mechanical properties of geo-textile grid and geotechnical contact surface are shown in Fig.1.
Numerical Simulations In order to verify the stability characteristics of the tailings, a dam in Liaoning is set as material properties.
The dam safety factor of 1.00 can be calculated by typing solve fos in the command line.

Introduction Fabric shape style refer to fabric appearance effect under certain forming conditions due to gravity [1].The traditional evaluation methods generally characterized by mechanical properties, firstly, it usually used static and dynamic drape tester or fabric style instrument to measure physical and mechanical property indicators, then combined with the main factor analysis, regression analysis, fuzzy clustering, grey correlation, artificial neural network and other methods to establish correlation between index data and fabric shape style, investigated the main factors influencing fabric shape style.
In the 1970 s, the study of correlation between mechanical properties and fabric style continuous developed and improved.
Mechanics of elastic performance of texile materials, Part Ⅴ: Aa study of the factors affecting the drape of fabrics -The development of a drape meter.Textile Res, 1950(08)
Relationship between drape-ability and mechanical properties of fabrics [J].
Relation between drape coefficients and mechanical properties of fabrics [J].

However, the design and analysis of steel-concrete beam-columns is a complex task involving many factors.
In the design of CFSTs, it is essential to understand the influence of these factors on the behavior of steel-concrete members.
In order to investigate the various factors affecting the behavior of HC FCS columns, Mohanad M. et al. (2023) [3] conducted a parametric finite element study and verified it using a three-dimensional numerical model.
Parameter studies underscored the influence of external steel tube properties and concrete shell thickness on column torsional behavior.
For slender sections, the bending strength under the same material properties is mainly affected by the effective elastic modulus.

It is difficult to analyze because the touch grinding between sucker rod and oil tube is uncertain random factors.
In addition, there are environmental factors, such as corrosion influence is also one of sucker rod column short-lived reasons.
The static load part is related with oil well production parameters , such as the diameter of rod, diameter of pump, submergence depth, pump setting depth and well liquid density;As dynamic load part relates to the above factors , but also to the well liquid properties which contains pumping stroke length, stroke times and well liquid viscosity, containing gas ratio.
Comprehensive considerating above all factors affect on sucker rod, this paper adopt 6 factors as influence variables .They are sucker rod stroke, sucker rod flush times, the diameter of the sucker rod, pump diameter, submergence depth, pump set depth.
It is reasonable that take sucker rod stroke, stroke frequency, sucker rod diameter , pump diameter, submergence depth,  downhole pump depth asthe main factors which affecting sucker rod suspension load.The maximum relative error of sucker rod maximum suspension load is 4% which can meet the demand of actual producing wells.It provides a new method to predict sucker rod suspension load by BP artificial neural network improved from LM.

The quick optimization of product performance is realized by Design Explorer of ANSYS workbench [5], which mainly help designers identify the impacts of those uncertain factors on the parts before the product designing and using, and also determine how best to improve the reliability of the product.
The Optimization Calculation of Static Strength Of Rod For simplicity, the following assumptions are needed: first, assuming that the whole possession space in rod is filled with matter without any vacant land; second, assuming that the mechanical properties of material has nothing to do with its position in the rod, that is to say the rod is uniform; third, assuming that the mechanical properties of material are the same in all directions, that is to say the rod is isotropic.
For rod length L and width b, they should be selected as bigger range as possible without affecting the normal movement.
[6] Mechanical Editers Group.
Material selected handbook for Mechanical Engineering [M].

These oils are not only affecting the process but also effecting the mechanical properties of the vulcanizate.
Table 1 The effects of incorporation of oil on increasing aromaticity on rheological and mechanical properties [4].
Hardness properties.
Rebound Resilience Properties.
This is probably due to other significant factors such as filler interaction and bonded rubber oil structural integration.

The mechanical properties of the coatings were analyzed with Nanoindentor.
Research topics related to these coatings include their high dissolution rate, bioactivity and adhesion strength that affect the long-term stability [2].
The biological and physico-chemical properties of apatite can be improved by doping with ions usually present in natural bone apatite, such as Mg2+, Zn2+, F-, etc.
Mechanical properties Hardness and Young’s modulus of the MHA coatings are shown in Fig.2.
Many factors can affect the mechanical properties of apatite coatings, such as deposition methods, firing parameters and post-treatment, etc [7, 8].

Probability theory determines how the uncertainties in crack size, loads, and material properties, when modelled accurately, affect the integrity of cracked structures.
The methods can account for random loads, material properties, and crack geometry.
The important parameters used in linear elastic fracture mechanics are the stress intensity factors in various modes.
The load, crack size and material properties were treated as statistically independent random variables.
The load and critical stress intensity factors, KIc were treated as statistically independent random variables.

And the mechanical properties were measured.
The microstructure and mechanical properties canimprove during this process.
In medium carbon ferritic-pearlite steels, the pearlite morphology has a great impact on the final mechanical properties.
The influence factors of precipitation strengthening are mainly the particle size and volume fraction of precipitates.
The measured microstructural parameters and mechanical properties are listed in Table 2.