Stress-Strain Behavior of Carbon Nanotube Under Compressive Loading

2016 ◽  
Vol 22 (11) ◽  
pp. 3777-3780
Author(s):  
Ashish Kumar Srivastava ◽  
Dinesh Kumar
Keyword(s):  
Carbon Nanotube ◽  
Compressive Loading ◽  
Stress Strain ◽  
Strain Behavior

scholarly journals Mechanical Strength Evaluation of Elastic Materials by Multiphysical Nondestructive Methods: A Review

2020 ◽  
Vol 10 (5) ◽  
pp. 1588 ◽  
Author(s):  
Huiting Huan ◽  
Lixian Liu ◽  
Andreas Mandelis ◽  
Cuiling Peng ◽  
Xiaolong Chen ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Optical Radiation ◽  
Defect Formation ◽  
State Of The Art ◽  
Compressive Loading ◽  
Stress Strain ◽  
Strength Evaluation ◽  
Strain Behavior ◽  
Stress Strain Relation ◽  
The Stability

The main purpose of industrial nondestructive testing (NDT) is to diagnose the stability, reliability and failure probability of materials, components and structures. Industrial component mechanical strength is one of the most important properties NDT is used to characterize. Subtle but perceptible changes in stress-strain behavior can be reliable indicators of defect formation. A detailed review on the state-of-the-art NDT methods using optical-radiation, photoacoustic, and photothermal techniques for mechanical strength evaluation and defect pre-diagnosis is presented in this article. Mechanical strength is analyzed in terms of the deformation/strain field, the stress-strain relation, and the residual stress in an elastic material subjected to tensile or compressive loading, or impact. By introducing typical NDT experiments, the history and features of each methodology are revisited and typical applications are discussed. This review also aims to be used as a reference toward further research and development of NDT technologies characterizing mechanical strength of materials and components.

scholarly journals Nonlinear stress-strain behavior of carbon nanotube fibers subject to slow sustained strain rate

2013 ◽  
Vol 103 (13) ◽  
pp. 131902 ◽  
Author(s):  
Gengzhi Sun ◽  
Dong Wang ◽  
John H. L. Pang ◽  
Jun Liu ◽  
Lianxi Zheng
Keyword(s):  
Carbon Nanotube ◽  
Strain Rate ◽  
Stress Strain ◽  
Strain Behavior ◽  
Nonlinear Stress ◽  
Carbon Nanotube Fibers

Tensile and Bending Behavior of Sintered Alloys: Experimental Results and Modeling

1998 ◽  
Vol 120 (3) ◽  
pp. 248-255 ◽  
Author(s):  
L. Bertini ◽  
V. Fontanari ◽  
G. Straffelini
Keyword(s):  
Compressive Loading ◽  
Analytical Models ◽  
Uniaxial Tensile ◽  
Stress Strain ◽  
Element Analysis ◽  
Strain Behavior ◽  
Bending Behavior ◽  
Sintered Alloys ◽  
Sintered Materials ◽  
Plastic Stress

Sintered materials show a different stress-strain behavior when subjected to tensile or compressive loading, the response to compression being characterized by a higher elastic modulus, yield stress, and strain hardening rate. These differences tend to make the bending behavior somewhat more complex to analyze, particularly in the elasto-plastic field, as compared to conventional materials, having equal mechanical properties under tension and compression. As a consequence, the use of widely applied test techniques, such as the Three Point Bending (TPB), becomes more difficult for sintered materials, due to the lack of reliable analytical models capable of evaluating elasto-plastic stress-strain distribution as a function of applied load and deflection. In the present investigation, the results of uniaxial tensile-compressive and bending tests conducted on sintered ferrous alloys characterized by different microstructures and porosity are reported and briefly discussed. Then an analytical model, specifically aimed to analyze the elasto-plastic monotonic behavior of a TPB specimen made with a material having different tensile and compressive properties, is presented. Its predictions as regards load-deflection curves and elasto-plastic stress-strain distributions are compared with the results of TPB tests and of numerical (Finite Element) analysis, showing a fairly good agreement.

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