A Method for Estimating the Mechanical Properties of a Solid Material Subjected to Significant Compressional Forces - Part I: Numerical Theoretical Solution for a Single Thick Plate

2003 ◽  
Author(s):  
Andrew J. Hull
Keyword(s):  
Mechanical Properties ◽  
Thick Plate ◽  
Solid Material ◽  
Theoretical Solution

Preliminary Experimental Study of Warm Ultrasonic Impact-assisted Laser Metal Deposition

2021 ◽  
pp. 1-15
Author(s):  
Hanyu Song ◽  
Minglang Li ◽  
Muxuan Wang ◽  
Benxin Wu ◽  
Ze Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Solid Material ◽  
Metal Deposition ◽  
Laser Metal Deposition ◽  
Ultrasonic Impact Treatment ◽  
Post Process ◽  
Underlying Mechanisms ◽  
Manufacturing Time

Abstract A preliminary experimental study on “warm ultrasonic impact-assisted laser metal deposition” (WUI-LMD) is reported, and such a study is rare in literatures to the authors' knowledge. In WUI-LMD, an ultrasonic impact treatment (UIT) tip is placed near laser spot for in-situ treatment of laser-deposited warm solid material, and the UIT and LMD processes proceed simultaneously. Under the conditions investigated, it is found that in-situ UIT during WUI-LMD can be much more effective in reducing porosity than a post-process UIT. Possible underlying mechanisms are analyzed. WUI-LMD has a great potential to reduce defects and improve mechanical properties without increasing manufacturing time.

Investigation on the effects of the joint type on the driven out bead in the welded pipes produced by high-frequency induction welding

2020 ◽  
pp. 146442072097343
Author(s):  
M Ghaffarpour ◽  
D Akbari ◽  
H Moslemi Naeini
Keyword(s):  
Mechanical Properties ◽  
Weld Joint ◽  
High Frequency ◽  
Weld Zone ◽  
Welding Process ◽  
Solid Material ◽  
Outer Diameter ◽  
Metallurgical Properties ◽  
Semi Solid ◽  
High Frequency Induction

In this paper, the effects of the joint type on the driven-out bead of the roll-formed pipes, welded by high-frequency induction welding process are studied. The main goal is to predict and reduce the volume of the bead driven out in the weld seam. Moreover, it aims to move the semi-solid bead during welding to the outer diameter of the pipe. This study has two prior aims: to produce a defect-free joint and to improve the mechanical and metallurgical properties. In order to optimize the weld joint, various joint types have been investigated by experimental tests and simulation. Lastly, destructive tests were used to determine if the desired mechanical properties of the weld joint were obtained. The metallurgical properties and the derivation of the semi-solid material in the weld zone have both been investigated in terms of microstructure. According to the results, the proper joint type improves the mechanical properties by 5% and reduces the volume of the weld bead about 45%.

Theoretical Solution for Thick Plate Resting on Pasternak Foundation by Symplectic Geometry Method

2013 ◽  
Vol 81 (3) ◽  
Author(s):  
Yang Zhong ◽  
Liu Heng
Keyword(s):  
Symplectic Geometry ◽  
Thick Plate ◽  
Solution Process ◽  
Theory Of Elasticity ◽  
Theoretical Solution ◽  
Rectangular Plates ◽  
Pasternak Foundation ◽  
Variable Separation ◽  
State Equations ◽  
Hamilton System

Based on the analogy of structural mechanics and optimal control, the theory of the Hamilton system can be applied in the analysis of problem solving using the theory of elasticity and in the solution of elliptic partial differential equations. With this technique, this paper derives the theoretical solution for a thick rectangular plate with four free edges supported on a Pasternak foundation by the variable separation method. In this method, the governing equation of the thick plate was first transformed into state equations in the Hamilton space. The theoretical solution of this problem was next obtained by applying the method of variable separation based on the Hamilton system. Compared with traditional theoretical solutions for rectangular plates, this method has the advantage of not having to assume the form of deflection functions in the solution process. Numerical examples are presented to verify the validity of the proposed solution method.

Investigation on Friction Conditions during a Severe Bending Deformation on a Thick Plate

2016 ◽  
Vol 716 ◽  
pp. 176-183
Author(s):  
Antonello D'Annibale ◽  
Mohamad El Mehtedi ◽  
Antoniomaria Di Ilio ◽  
Filippo Gabrielli ◽  
Lorenzo Panaccio
Keyword(s):  
Mechanical Properties ◽  
Mechanical Model ◽  
Thick Plate ◽  
Low Carbon Steel ◽  
Experimental Tests ◽  
Stress And Strain ◽  
Low Carbon ◽  
Bending Process ◽  
Steel Aisi ◽  
Machining Operations

In this paper, the friction behaviour in a severe bending process of a thick plate was investigated, taking into account both dry and lubricated conditions. Early experimental tests were performed to obtain mechanical properties of the low carbon steel AISI 1006, to be used as input in FE solver. Besides a 3D thermo-mechanical model based on FEM was developed to predict stress and strain distributions and final component dimensions. The second experimental series was composed of a coining process and a forming operation to reach the size of the final part. The analysis and the control of the friction conditions has permitted to obtain a product of higher quality that permitted to avoid all the secondary machining operations previously required.

Reinforcing Effect of Montmorillonite Nanoclay on Mechanical Properties of High Density Polyethylene Nanocomposites

2014 ◽  
Vol 591 ◽  
pp. 60-63 ◽  
Author(s):  
N. Venkatesan ◽  
G.B. Bhaskar ◽  
Kaliyaperumal Pazhanivel ◽  
K. Poyyathappan
Keyword(s):  
Mechanical Properties ◽  
High Density Polyethylene ◽  
Solid Material ◽  
High Density ◽  
Polymer Materials ◽  
Good Surface ◽  
Melt Compounding ◽  
Standard Specimens ◽  
Twin Screw ◽  
Good Surface Finish

In recent years, many researches focused on the polymer materials to study the characteristics and to enhance the mechanical properties of the nanocomposites in order to understand the factors which lead to the desired dispersion of nanoclay in the polymer matrix. The samples used in this work were prepared through melt compounding, using high-density polyethylene and organo-modified clay of montmorillonite (MMT). During manufacturing of MMT/HDPE nanocomposites, a silane modifier and polyethylene grafted with maleic anhydride (compatibilizer) were added to get good surface finish and to act as bonding agent respectively. In addition, the compatibilizer will help in attaining better intercalation. Using a Plastograph-Mixer through twin-screw extruder, the high density polyethylene and different weight percentages (0, 1, 2, 3, 4 wt. %) of MMT are mixed and subsequently the composite is produced in the form of solid material. ASTM standard specimens for various tests are produced using injection molding machine with respective dies. The prepared experimental specimens for various tests like tensile, flexural, impact and shore-hardness are tested for its respective strengths. From this investigation, it is concluded that the addition of MMT nanoclay in HDPE has significantly influenced the mechanical properties of the composites.

Effect of Intermediate Thermomechanical Treatment on Microstructure and Mechanical Properties of 2A97 Al-Li Alloy

2019 ◽  
Vol 960 ◽  
pp. 70-77
Author(s):  
Juan Yu ◽  
Zheng Lu ◽  
Yan Cai Xiong ◽  
Guo Ai Li ◽  
Zhao Hui Feng
Keyword(s):  
Mechanical Properties ◽  
Thermomechanical Treatment ◽  
Tensile Testing ◽  
Transverse Direction ◽  
Thick Plate ◽  
High Energy ◽  
Short Transverse ◽  
Compression Deformation ◽  
Δ Phase ◽  
Alloy Increase

Effect of intermediate thermomechanical treatment on tensile properties at short-transverse direction, fracture mechanism and microstructure of 2A97 Al-Li alloy thick plate were studied by tensile testing, SEM, EBSD and TEM.The results show that with the increasing of compression deformation, the strength and elongation of the alloy increase first and then decrease slightly. The fracture mode of the alloy changes from quasi-cleavage fracture to high energy ductile fracture. When the compression deformation rises to 20%, the elongated structure are replaced by a more uniform and equiaxial structure. The distribution of δ phase distribute more homogeneously in the grains.

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