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It is expected to find a value large enough to have a small penetration, without affecting significantly the behaviour of the analysis.
Table 3: Comparison between different penetration limit factors - Contact between two cylinders.
The material properties are E = 210 GPa and ν = 0.3.
Table 6 shows the results for different stiffness factors in terms of the number of iterations and computational time.
Moreover, the stiffness matrix can become ill-conditioned, affecting the convergence and also leading to higher amounts of computational time.

[4], in their study on fly ash-based geopolymers have reported that the type of alkaline activator was the significant factor affecting the mechanical strength of geopolymers.
However, very limited information available on the properties of geopolymer produced using WPSA-based binder.
Table 1 shows the chemical properties of WPSA obtained in MNI using XRF analysis.
Synthesis and mechanical properties of metakaolinite-based geopolymers, Colloids and Surfaces A – Physicochemical and Engineering Aspects
Influence of pozzolan from various by-product materials on mechanical properties of Development and properties of low-calcium high-strength concrete.

On the other hand, math approach all alone is not enough as there is no way to account for all factors.
In general, it's physical properties are much like that of the normal steel.
Table 1 shows the physical properties of the rubber.
The direction of the cord and its physical properties can greatly vary, however, in case of vulcanization.
The properties of composite material used in this investigation are shown in Fig. 5.

Discarded bead wires’ properties.
Results and Discussion Rheological Properties.
Obviously, it can be observed that he addition of DBW into SCC affected the rheological properties adversely.
Hardened Properties.
Hajibandeh, Experimental investigation on effects of hybrid fibers on rheological, mechanical, and durability properties of high-strength SCC, Const. and Build.

It is shown that taking into account the bimodularity of the material significantly affects the maximum tensile and compressive stresses.
Multi-modularity of concrete depends on many factors: aggregate, age, temperature, etc.
The strength of the elements of building structures is determined by the mechanical characteristics of concrete, including the difference in the elastic modulus in tension from the elastic modulus in compression.
Voyiadjis, Alexander Zolochevsky, Thermodynamic modeling of creep damage in materials with different properties in tension and compression, International Journal of Solids and Structures. 37(issue 24) (2000) 3281-3303
Andreev, Layered structure mechanical properties assessment by dynamic tests, MATEC Web of Conferences. 117 (2017) 00018 [12] A.

Due to the nature of SLM manufacturing, as-built parts have some peculiarities: anisotropy of mechanical and structural properties, high surface roughness, and complications powder evacuation from small size channels.
Factors causing residual stresses in parts manufactured through SLM are the deformation in various sections of an object due to different thermal gradients and temperature-dependent properties of material; volumetric changes arising during heating and solidification or due to phase transformation, or from differences in the material properties of the multi-material SLM objects.
Wauthle, Assessing and comparing influencing factors of residual stresses in selective laser melting using a novel analysis method, in: Proc.
Loureiro, Properties and applications of titanium alloys: a brief review.
Stucker, Microstructures and mechanical properties of Ti6Al4V parts fabricated by Selective Laser Melting and Electron Beam Melting, JMEP 22/12 (2013) 3873-3883

Research on Mechanical Property of Top Drive Casing Running Tool’s Slips Faguang Jiang1, a, Zheng Liang1, b, Guanghui Zhao1, c , Yonghong Yan2, d and Pan Wang2, e 1 Mechatronic Engineering College, Southwest Petroleum University, Chengdu, 610500, China 2 Baoji Oilfield Machinery Co., LTD, Baoji, 721002, China ajiangfg@126.com, bliangz_2242@126.com, cwy_zgh@yahoo.com.cn, dhys_ yyh@ bomco·cn, ewp2080@126.com Keywords: Slips, Shell Theory, Casing, Contact Mechanics, Finite Element Method Abstract.
The slips system’s parameters, such as the axial thrust, slips length, teeth form, teeth interval, etc., directly affect the performance and safety of casing running tools.
Here, we found the mechanical analysis model between slip and casing and gain the minimum primitive axis thrust of slips.
So, we develop systematic analysis and research of slips’ structural and mechanical property to offer reference to design slips systems. 1.
f1—— Friction factor between slips and slips bowl.

For example, Wang Min predicted the quality of welded joints by the neural network, and experimental results also are desirable [5]; Buffa G [6] established a neural network prediction model of the weld grain; Dong Junhui[7] used an adaptive fuzzy neural network to predict mechanical properties of welded joints successfully, in which the tensile strength of welded joints, bending strength and elongation and other mechanical properties were more accurately predicted.
In order to facilitate research and minimize the impact of nonlinear factors, this paper only established the neural network model between the welding parameters and temperature field.
During this process, the factors which affect the quality of weld include: thickness, shape of friction stir, rotation speed, the amount of the pressure, welding speed and thermal conditions.
Mechanical property prediction of welding joint based on artificial neural network for titanium alloy [J], Aeronautical Manufacturing Technology. 2009, 16:79-81
Mechanical property prediction of welding joint based on fuzzy-artificial neural network [J].

Introduction Titanium and its alloys have perfect corrosion resistance, excellent mechanical properties and good compatibility with bone and not rejected by the living organisms.
They pointed out that deposition parameters alter properties and structure of PLD-HA films.
These effects have tremendous impacts on the resultant surface properties.
HA powders in dielectric liquid lead intense secondary sparking and therefore liable to transient surface properties.
The operational parameters such as pulse on duration and current are the key factors.

Fig.1 The mining stope structure Theoretical calculations of safety thickness of stope roof There are many factors that affect the stability of the orebody roof.
Internal factors include roof thickness and completeness, excavation span and morphology, rock strength, fracture status.
Meanwhile, external factors include the size of the load, the frequency of the load, temperature and humidity, etc.
Based on the theory of beam and slab and consider the weight of the roof stress, the change of lateral pressure along the vertical direction, structure surface properties, the structural plane and the extruding structure surface tensile, shear strength under the control of mining safety thickness of roof are analyzed.
Fig.3 Vertical displacement contour (Profile) Fig.4 Vertical displacement contour (Surface) Fig.5 The ground subsidence contour Fig.6 The plastic zone map Conclusion The main factors are incorporated into the improved formula, such as the weight of the roof stress, the change of lateral pressure along the vertical direction and structure surface properties, the calculation of safety thickness range of roof is more reasonable.