Residual stress influences on the sensitivity of ultrasonic sensor having composite membrane structure

2006 ◽  
Vol 125 (2) ◽  
pp. 242-248 ◽  
Author(s):  
Seungmock Lee ◽  
Tsunehisa Tanaka ◽  
Koji Inoue
Keyword(s):  
Residual Stress ◽  
Composite Membrane ◽  
Membrane Structure ◽  
Ultrasonic Sensor ◽  
Stress Influences

Studying the nonlinear properties and strain-rate sensitivity of SiC short fiber-reinforced Al matrix composites

2017 ◽  
Vol 24 (4) ◽  
pp. 521-529
Author(s):  
Junjie Ye ◽  
Yuanying Qiu ◽  
Yumin He ◽  
Juan Ma ◽  
Xinglong Zhang ◽  
...  
Keyword(s):  
Residual Stress ◽  
Composite Structures ◽  
Early Stage ◽  
Strain Analysis ◽  
Prediction Method ◽  
Short Fiber ◽  
Thermal Residual Stress ◽  
Fiber Reinforced ◽  
Nonlinear Properties ◽  
Stress Influences

AbstractStress-strain analysis has been an interesting issue for the mechanical design of composite structures. In this paper, a three-dimensional mechanical model based on generalized method of cells is presented to study the thermal residual stress and loading rates influence on the mechanical responses of short fiber-reinforced (SFR) composites. The effects of the fiber shape on the elastic constant of the SFR were investigated. To verify the prediction method, the calculated elastic modulus was compared with the results of finite element method. On this basis, a unified constitutive model is used to acquire the nonlinear properties of matrix materials. For comparison, SFR composites with and without consideration of thermal residual stress influences on the nonlinear responses are both considered. The results show that the distinct difference for SFR composites can be found at an early stage of loading. Meanwhile, the thermal residual stress influences on the mechanical behaviors present two characteristic stages.

The Formation and Behaviour of Residual Stresses with Finished Surfaces

2016 ◽  
Vol 686 ◽  
pp. 63-67
Author(s):  
Frantisek Holešovsky ◽  
Radek Lattner ◽  
Martin Novák ◽  
Milan Dian
Keyword(s):  
Residual Stress ◽  
High Pressures ◽  
Load Capacity ◽  
Ground Surface ◽  
Plastic Deformations ◽  
Workpiece Surface ◽  
Dimension Stability ◽  
Machine Parts ◽  
Stress Influences

The single tool grains affect the workpiece surface during grinding in the separated areas of deformation. The elastic and consequently plastic deformations occur at the engagement of grains. The friction of grain and material likewise the friction of elementary chip and grain acts simultaneously. These phenomena are accompanied with an origination of great amount of heat and high pressures and that is the reason for residual stress origin and formation in the ground surface. The residual stress is an important factor in influencing usable properties of machine parts. The stress influences not only the dynamical load capacity of surface but the durability and quality of design units as well. This stress is considered as the source of so called technological notches, having an influence on corrosion resistance, wear resistance, and dimension stability of machine parts.

Influence of composite membrane structure on pervaporation

1991 ◽  
Vol 61 ◽  
pp. 19-30 ◽  
Author(s):  
W. Gudernatsch ◽  
Th. Menzel ◽  
H. Strathmann
Keyword(s):  
Composite Membrane ◽  
Membrane Structure

Effects of Residual Stress on Interfacial Bonding Strength of WC Coating

2009 ◽  
Vol 16-19 ◽  
pp. 10-14
Author(s):  
De Jun Kong ◽  
F. Yuan ◽  
Hong Miao
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Bonding Strength ◽  
Flame Spraying ◽  
X Ray Diffraction ◽  
X Ray ◽  
Interfacial Bonding Strength ◽  
Stress Influences ◽  
Micro Structures ◽  
Coating Stress

The residual stresses of WC coating prepared by flame spraying and laser re-melting were measured quantitatively with X-ray diffraction (XRD) stress tester, and its micro-structures were observed with SEM, and the effects of residual stress on bonding strength of coating interface were analyzed. The experimental results are shown that residual stresses of WC coating are all tensile, and the effects of coating thickness on its residual stress is obvious, and residual stress is verse ratio with its thickness; Coating stress influences its cracking, tensile stress speeds its cracking, which causes its bonding strength decrease; The stress state is improved by decreasing its thickness, and its bonding strength can be increased.

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