PS01 Estimation Method for Elastic Plastic Stress-strain Response Based on Hardness Tests Using Triangular Pyramid Indenters

2013 ◽  
Vol 2013 (0) ◽  
pp. _PS01-1_-_PS01-3_
Author(s):  
Yuki SAITO ◽  
Takafumi KOMORI ◽  
Shota HASUNUMA ◽  
Takeshi OGAWA
Keyword(s):  
Estimation Method ◽  
Strain Response ◽  
Stress Strain ◽  
Elastic Plastic ◽  
Triangular Pyramid ◽  
Hardness Tests ◽  
Plastic Stress

Prediction of the Elastic—Plastic Stress/Strain Response for Injection-Molded Long-Fiber Thermoplastics

2008 ◽  
Vol 43 (3) ◽  
pp. 217-246 ◽  
Author(s):  
BA Nghiep Nguyen ◽  
Satish K. Bapanapalli ◽  
Vlastimil Kunc ◽  
Jay H. Phelps ◽  
Charles L. Tucker
Keyword(s):  
Strain Response ◽  
Stress Strain ◽  
Elastic Plastic ◽  
Long Fiber Thermoplastics ◽  
Injection Molded ◽  
Plastic Stress

ELASTIC, PLASTIC, CRACKING ASPECTS OF THE HARDNESS OF MATERIALS

2013 ◽  
Vol 27 (08) ◽  
pp. 1330004 ◽  
Author(s):  
R. W. ARMSTRONG ◽  
W. L. ELBAN ◽  
S. M. WALLEY
Keyword(s):  
Amorphous Materials ◽  
Hardness Test ◽  
Polycrystalline Materials ◽  
Stress Strain ◽  
Elastic Plastic ◽  
Dislocation Mechanics ◽  
Hardness Tests ◽  
Order Of Magnitude ◽  
Strain Relationship ◽  
Elastic And Plastic Deformation

The hardness properties of materials are tracked from early history until the present time. Emphasis is placed on the hardness test being a useful probe for determining the local elastic, plastic and cracking properties of single crystal, polycrystalline, polyphase or amorphous materials. Beginning from connection made between individual hardness pressure measurements and the conventional stress–strain properties of polycrystalline materials, the newer consideration is described of directly specifying a hardness-type stress–strain relationship based on a continuous loading curve, particularly, as obtained with a spherical indenter. Such effort has received impetus from order-of-magnitude improvements in load and displacement measuring capabilities that are demonstrated for nanoindentation testing. Details of metrology assessments involved in various types of hardness tests are reviewed. A compilation of measurements is presented for the separate aspects of Hertzian elastic, dislocation-mechanics-based plasticity and indentation-fracture-mechanics-based cracking behaviors of materials, including elastic and plastic deformation rate effects. A number of test applications are reviewed, most notably involving the hardness of thin film materials and coatings.

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