Determination of Torque-Strain Relationship in an Impact Wrench

2011 ◽  
Author(s):  
Ryoichi Amano ◽  
Sourabh Kumar ◽  
Ryan Fargen ◽  
Michael Konkel
Keyword(s):  
Strain Relationship

scholarly journals Bias Truck Tire Deformation Analysis with Finite Element Modeling

2020 ◽  
Vol 10 (12) ◽  
pp. 4326
Author(s):  
Józef Pelc
Keyword(s):  
Incompressible Material ◽  
Axisymmetric Deformation ◽  
Thermal Shrinkage ◽  
Deformation Analysis ◽  
Truck Tire ◽  
Non Linear ◽  
Strain Relationship ◽  
Tire Modeling ◽  
Total Lagrangian Formulation

This paper presents a method for modeling of pneumatic bias tire axisymmetric deformation. A previously developed model of all-steel radial tire was expanded to include the non-linear stress–strain relationship for textile cord and its thermal shrinkage. Variable cord density and cord angle in the cord-rubber bias tire composite are the major challenges in pneumatic tire modeling. The variabilities result from the tire formation process, and they were taken into account in the model. Mechanical properties of the composite were described using a technique of orthotropic reinforcement overlaying onto isotropic rubber elements, treated as a hyperelastic incompressible material. Due to large displacements, the non-linear problem was solved using total Lagrangian formulation. The model uses MSC.Marc code with implemented user subroutines, allowing for the description of the tire specific properties. The efficiency of the model was verified in the simulation of mounting and inflation of an actual bias truck tire. The shrinkage negligence effect on cord forces and on displacements was examined. A method of investigating the influence of variation of cord angle in green body plies on tire apparent lateral stiffness was proposed. The created model is stabile, ensuring convergent solutions even with large deformations. Inflated tire sizes predicted by the model are consistent with the actual tire sizes. The distinguishing feature of the developed model from other ones is the exact determination of the cord angles in a vulcanized tire and the possibility of simulation with the tire mounting on the rim and with cord thermal shrinkage taken into account. The model may be an effective tool in bias tire design.

scholarly journals First-Principles Determination Of The Effects Of Boron And Sulfur On The Ideal Cleavage Fracture In Ni3Al

1995 ◽  
Vol 409 ◽  
Author(s):  
Sheng N. Sun ◽  
Nicholas Kioussis ◽  
Mikael Ciftan ◽  
A. Gonis
Keyword(s):  
Cleavage Fracture ◽  
First Principles ◽  
Cleavage Plane ◽  
Full Potential ◽  
Fracture Properties ◽  
Electronic Mechanism ◽  
Strain Relationship ◽  
First Time ◽  
The Ideal

AbstractThe effects of boron and sulfur impurities on the ideal cleavage fracture properties of Ni3Al under tensile stress are investigated for the first time using the full-potential linearmuffin- tin-orbital (FLMTO) total-energy method, with a repeated slab arrangement of atoms simulating an isolated cleavage plane. Results for the stress-strain relationship, ideal cleavage energies, ideal yield stress and strains with and without impurities are presented, and the electronic mechanism underlying the contrasting effects of boron and sulfur impurities on the ideal cleavage of Ni3Al is elucidated.

Simulation of the Hot Extrusion Process of Sintered WCu40 Covered with a Steel Cup

2013 ◽  
Vol 762 ◽  
pp. 520-525
Author(s):  
Qiang Lin ◽  
Zu Yan Liu ◽  
Xin Yan Su
Keyword(s):  
Powder Compact ◽  
Hot Extrusion ◽  
Extrusion Process ◽  
Extrusion Ratio ◽  
Extrusion Temperature ◽  
Optimal Parameters ◽  
Stress Strain ◽  
Strain Relationship ◽  
Relationship Of

In this paper, based on the determination of the stress-strain relationship of sintered W-40wt.%Cu by upsetting tests, the hot extrusion process of the materials covered with a steel cup has been simulated by DEFORM. The effect of the thickness of steel cup, extrusion temperature and extrusion ratio on the extrusion process has been studied, so that a group of optimal parameters could be obtained which is useful to the experiment of powder compact by extrusion with cups.

An empirical evaluation of pressuremeter test data

1981 ◽  
Vol 18 (3) ◽  
pp. 455-459 ◽  
Author(s):  
M. Arnold
Keyword(s):  
Empirical Evaluation ◽  
Radial Strain ◽  
Analytical Relationship ◽  
Foundation Design ◽  
Pressuremeter Test ◽  
Expansion Pressure ◽  
Strain Relationship ◽  
Analytical Expressions

In situ pressuremeter tests have in recent years come into wide use in the determination of the parameters to be used for foundation design. Although theoretically correct analytical expressions have been developed for the radial expansion pressure versus radial strain relationship, these are generally cumbersome and difficult to use and in practice a graphical procedure is commonly used to derive the maximum undrained shear stress and the undrained modulus value from the test data.To overcome the disadvantages that this graphical procedure involves an empirically-derived analytical relationship based on Kondner's hyperbolic stress–strain relationship is presented here, by means of which all the derived parameters can be obtained simply and without recourse to graphical construction.

Determination of Reasonable Scope of Self-Stress for Concrete Filled Steel Tubular Arch Bridge

2012 ◽  
Vol 428 ◽  
pp. 108-113
Author(s):  
Shui Xing Zhou ◽  
Ling Jun Li ◽  
Yue Ma ◽  
Lu Li
Keyword(s):  
Yield Criterion ◽  
Circumferential Stress ◽  
Steel Tube ◽  
Expansion Rate ◽  
Arch Bridge ◽  
Limit Value ◽  
Cfst Arch Bridge ◽  
Strain Relationship ◽  
Von Mises

According to the requirement of specification that steel tube of concrete filled steel tubular (CFST) arch bridge should be among elastic state in service stage, this paper obtained a maximum limit value of steel tube circumferential stress.Then based on the Von Mises yield criterion and principle of static equilibrium, the formula of the circumferential stress of steel tube and self-stress of concrete was built. The equation of restrained expansion rate and self-stress of concrete in accordance with general stress-strain relationship was established. The reasonable scope of self-stress should be controlled in MPa, which could ensure to reach the restrained expansion rate of concrete in closed condition.

Deformation Characteristics of Aluminum-Clad Stainless Steel Sheet Under Uniaxial Tension

1998 ◽  
Vol 120 (1) ◽  
pp. 179-184 ◽  
Author(s):  
T. Mori ◽  
S. Kurimoto
Keyword(s):  
Stainless Steel ◽  
Tensile Test ◽  
Rolling Process ◽  
Deformation Characteristics ◽  
Stress Strain ◽  
Steel Sheets ◽  
Clad Sheet ◽  
Strain Relationship ◽  
Relationship Of

Clad sheets are now widely used in a wide variety of industrial practices, however, determination of deformation characteristics are difficult. In this research, the unique deformation characteristics and properties of aluminum-clad stainless steel sheets produced by hot rolling process are discussed. The tensile test and characteristics of necking appearing on the clad sheet and the separate materials composing the clad sheet are examined. The results of the experiments for the stress-strain curves of the separate materials compared well with the estimated values. The stress-strain relationship of the separate materials can thus be determined from the tensile test of clad sheet.

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