On the determination of representative stress–strain relation of metallic materials using instrumented indentation

2015 ◽  
Vol 65 ◽  
pp. 989-994 ◽  
Author(s):  
Kunkun Fu ◽  
Li Chang ◽  
Bailin Zheng ◽  
Youhong Tang ◽  
Hongjian Wang
Keyword(s):  
Metallic Materials ◽  
Instrumented Indentation ◽  
Stress Strain ◽  
Strain Relation ◽  
Stress Strain Relation

An Improved Method of Determining the Disturbed State Concept Model Parameters

2014 ◽  
Vol 919-921 ◽  
pp. 1345-1349
Author(s):  
Wei Lu ◽  
Jia Jun Pan
Keyword(s):  
Triaxial Compression ◽  
Model Parameters ◽  
Improved Method ◽  
Stress Strain ◽  
Material Parameters ◽  
Concept Model ◽  
Strain Relation ◽  
Stress Strain Relation ◽  
Disturbed State Concept

The method of postulate of relatively intact model in the disturbed concept model is reached. Because it is more difficult to assume relatively intact curve by observed experimental data, a method which could automatically calculate the stress strain relation curve of relative intact by triaxial compression test data is raised, so that the determination of material parameters becomes easier, and the improved method is verified by numerical calculation. The results show that this method can effectively determine the stress strain relation curve of relative intact.

In Vivo Determination of the Stress-Strain Relation of the Human Myometrium

1976 ◽  
Vol 55 (4) ◽  
pp. 325-331 ◽  
Author(s):  
Ingemar Joelsson ◽  
Lennart Gidlund ◽  
Bo Anzén ◽  
Axel Ingelman-Sundberg
Keyword(s):  
Human Myometrium ◽  
Stress Strain ◽  
Strain Relation ◽  
Stress Strain Relation

scholarly journals Novel Ring Compression Test Method to Determine the Stress-strain Relations and Mechanical Preperties of Metallic Materials

2021 ◽  
Author(s):  
Guang-Zhao Han ◽  
lixun Cai ◽  
Chen Bao ◽  
Bo Liang ◽  
Yang Lv ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Test Method ◽  
Metallic Materials ◽  
Compression Tests ◽  
Stress Strain ◽  
Element Analysis ◽  
Strain Relation ◽  
Stress Strain Relation ◽  
Ring Compression ◽  
Wide Range

Abstract Although there are methods for testing the stress–strain relation and strength, which are the most fundamental and important properties of metallic materials, their application to small size specimens is limited. In this study, a new dimensionless elastoplastic load–displacement (EPLD-Ring) model for compressed metal rings with isotropy and constitutive power law is proposed to describe the relation between the geometric dimensions, Hollomon law parameters, load, and displacement based on energy density equivalence. Furthermore, a novel test method for the rings is developed to obtain the elastic modulus, stress–strain relation, yield strength, and tensile strength. The universality and accuracy of the model are verified within a wide range of imaginary materials via finite element analysis (FEA), and the results show that the stress–strain relations obtained with the model are more consistent with those inputted in the FEA software. Additionally, for seven metallic materials, a series of ring compression tests with various dimensions were performed. It was found that the stress–strain relations and mechanical properties predicted by the model are in agreement with the normal tensile test results. It is believed that the new method is reliable and effective for testing the mechanical properties of small size materials and tube components.

scholarly journals Novel Ring Compression Test Method to Determine the Stress-Strain Relations and Mechanical Properties of Metallic Materials

2021 ◽  
Vol 34 (1) ◽  
Author(s):  
Guangzhao Han ◽  
Lixun Cai ◽  
Chen Bao ◽  
Bo Liang ◽  
Yang Lyu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compression Test ◽  
Test Method ◽  
Uniaxial Tensile ◽  
Metallic Materials ◽  
Ring Compression Test ◽  
Stress Strain ◽  
Strain Relation ◽  
Stress Strain Relation ◽  
Ring Compression

AbstractAlthough there are methods for testing the stress-strain relation and strength, which are the most fundamental and important properties of metallic materials, their application to small-volume materials and tube components is limited. In this study, based on energy density equivalence, a new dimensionless elastoplastic load-displacement model for compressed metal rings with isotropy and constitutive power law is proposed to describe the relations among the geometric dimensions, Hollomon law parameters, load, and displacement. Furthermore, a novel test method was developed to determine the elastic modulus, stress-strain relation, yield and tensile strength via ring compression test. The universality and accuracy of the method were verified within a wide range of imaginary materials using finite element analysis (FEA), and the results show that the stress-strain curves obtained by this method are consistent with those inputted in the FEA program. Additionally, a series of ring compression tests were performed for seven metallic materials. It was found that the stress-strain curves and mechanical properties predicted by the method agreed with the uniaxial tensile results. With its low material consumption, the ring compression test has the potential to be as an alternative to traditional tensile test when direct tension method is limited.

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