scholarly journals Control of Material Properties Using High Pressure Techniques.

1993 ◽  
Vol 42 (475) ◽  
pp. 455-461
Author(s):  
Akihito MATSUMURO
Keyword(s):  
High Pressure ◽  
Material Properties

Considerations on Designing Artificial Muscle Working at High Pressure

2012 ◽  
Vol 268-270 ◽  
pp. 1457-1463
Author(s):  
Li Chao Wang ◽  
Xiao Dong Wang
Keyword(s):  
High Pressure ◽  
Material Properties ◽  
Weight Ratio ◽  
Artificial Muscle ◽  
Force Output ◽  
Compact Structure ◽  
Small Power ◽  
Small Force ◽  
Working Principle ◽  
Contraction Angle

Artificial muscle is a new style of actuator with novel working principle, which owns the advantages of compact structure, high power-to-weight ratio, compliance and easy application. Pneumatic artificial muscle (PAM) is usually used in robotics, medical auxiliaries and other small force output occasions nowadays. However, it suffers problems of small power, hysteresis and poor repeatability. A kind of artificial muscle working at high pressure was researched. Different muscle styles are compared and MicKibben structure is selected while fluid media is determined. Furthermore, factors of geometry and material properties, which limit the ultimate pressure, are analyzed. Formulas and simulations verify the influence of limitation and help to calculate key parameters of 18MPa artificial muscle. Data show that it is possible in theory to design high pressure artificial muscle by overall consideration of initial diameter, initial contraction angle and material properties, initial length only influent the stroke.

High-Pressure Pipelines Repaired by Steel Sleeve and Epoxy Composition

2013 ◽  
Vol 486 ◽  
pp. 181-188 ◽  
Author(s):  
Pavol Novák ◽  
Milan Žmindák ◽  
Zoran Pelagić
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
High Pressure ◽  
Material Properties ◽  
Welded Joint ◽  
Experimental Measurements ◽  
Filling Material ◽  
Epoxy Composition ◽  
State Of Stress ◽  
Steel Sleeve

The aim of this paper is first to determine the state of stress of welded joint repaired by steel sleeve and epoxy composition. Experimental measurements are performed on samples to determine required material properties. The structural analysis by finite element method (FEM) is performed for a pressurized pipe with insufficiently welded root and installed cold sleeve. Simulated is the case of depressurized pipes that could cause a breach of cohesion between filling material and surface of pipe or sleeve with usage of cohesive finite elements. In the end the sleeve dimensions are optimized with respect to maximum integrity to the repaired sleeve.

Material properties of Ni Cr Al alloy and design of a 4 GPa class non-magnetic high-pressure cell

2002 ◽  
Vol 14 (44) ◽  
pp. 11291-11296 ◽  
Author(s):  
Yoshiya Uwatoko ◽  
Sakae Todo ◽  
Kazuhiro Ueda ◽  
Ahimusa Uchida ◽  
Masashi Kosaka ◽  
...  
Keyword(s):  
High Pressure ◽  
Material Properties ◽  
Al Alloy ◽  
High Pressure Cell ◽  
Pressure Cell

scholarly journals Role of High Pressure in Identifying Alloying Elements for Modifying Material Properties.

1998 ◽  
Vol 7 ◽  
pp. 338-340
Author(s):  
P. Ch. Sahu ◽  
N. V. Chandra Shekar ◽  
Mohammad Yousuf ◽  
K. Govinda Rajan
Keyword(s):  
High Pressure ◽  
Material Properties ◽  
Alloying Elements

Viscoelastic material properties in a high pressure environment

1998 ◽  
Author(s):  
B. Fowler ◽  
L. Rogers
Keyword(s):  
High Pressure ◽  
Viscoelastic Material ◽  
Material Properties ◽  
High Pressure Environment

Fatigue and material characteristics of a hot-formed AZ31 magnesium alloy

2015 ◽  
Vol 29 (06n07) ◽  
pp. 1540010 ◽  
Author(s):  
Chang-Min Suh ◽  
Kwang-Ho Hor ◽  
Seung-Hoon Nahm ◽  
Min-Soo Suh
Keyword(s):  
High Pressure ◽  
Fatigue Life ◽  
Fatigue Limit ◽  
Material Properties ◽  
Room Temperature ◽  
Material Structure ◽  
Processing Temperature ◽  
Optimal Temperature ◽  
Forming Process ◽  
Forming Quality

Magnesium alloys are known to be hard-forming materials at room temperature owing to their material structure. This study analyzes the optimal temperature conditions of warm-forming and the forming process by using a high-pressure laminating test and FM analysis, respectively. The effect of temperatures on the fatigue limit was examined from the collected specimens by analyzing the material properties after the fatigue test. The material formed at a temperature of 230°C shows occasional defects, but the best forming quality was obtained at 270°C. The optimal temperature for the forming process was found to be 250°C considering the material quality and thermal efficiency. The overall fatigue life of specimens decreases with an increase in the processing temperature. The fatigue limit of AZ31 formed at 250°C was approximately 100 MPa after 106 cycles.

scholarly journals A microstructure-based model for describing the material properties of Al–Zn alloys during high pressure torsion

2015 ◽  
Vol 68 ◽  
pp. 150-163 ◽  
Author(s):  
M. Borodachenkova ◽  
F. Barlat ◽  
W. Wen ◽  
A. Bastos ◽  
J.J. Grácio
Keyword(s):  
High Pressure ◽  
Material Properties ◽  
High Pressure Torsion ◽  
Zn Alloys
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