scholarly journals The Research Committee Report on Evaluation of Delayed Fracture Properties for Spring Steels Second Activity Part 2 —Grasping Delayed Fracture Pattern of Coil Spring and Establishing Test Method Used Test Piece Reproduced it—

2021 ◽  
Vol 2021 (66) ◽  
pp. 87-95
Author(s):  
Keyword(s):  
Test Piece ◽  
Fracture Pattern ◽  
Test Method ◽  
Committee Report ◽  
Coil Spring ◽  
Research Committee ◽  
Delayed Fracture ◽  
Fracture Properties ◽  
Spring Steels

Development of a New Laboratory Test Method for Spring Steels

1972 ◽  
Vol 94 (1) ◽  
pp. 223-227 ◽  
Author(s):  
S. T. Furr
Keyword(s):  
Laboratory Test ◽  
Laboratory Investigation ◽  
Testing Equipment ◽  
Test Method ◽  
Coil Spring ◽  
Standard Equipment ◽  
Laboratory Test Method ◽  
Spring Steels ◽  
Loss Resistance ◽  
Practical Tool

Existing methods for evaluating spring steels in terms of load-loss resistance for automotive coil spring applications are very time-consuming and require special spring-making and spring-testing equipment. Over the years, the impracticalness of these methods has been an obstacle to the development of better spring steels. The present study shows how the torsional Bauschinger test can be used to predict the relative loadloss resistance of spring steels through correlations which were worked out during the laboratory investigation. Advantages of the torsional Bauschinger test are: (a) small, straight specimens are used, (b) the test takes only a few minutes, and (c) standard equipment is employed (a standard torsion tester). Results to date indicate that this test method will serve as a practical tool for providing the kind of information needed to develop improved spring steels.

Studies on effect of steel fiber and coarse aggregate on fracture properties of self compacting concrete using wedge splitting test

2019 ◽  
Vol 11 (6) ◽  
pp. 751-767
Author(s):  
Raja Rajeshwari B. ◽  
Sivakumar M.V.N.
Keyword(s):  
Fracture Energy ◽  
Coarse Aggregate ◽  
Peak Load ◽  
Mouth Opening ◽  
Test Method ◽  
Crack Mouth Opening Displacement ◽  
Fine Aggregate ◽  
Content Type ◽  
Fracture Properties ◽  
Splitting Test

Purpose Fracture properties depend on the type of material, method of testing and type of specimen. The purpose of this paper is to evaluate fracture properties by adopting a stable test method, i.e., wedge split test. Design/methodology/approach Coarse aggregate of three different sizes (20 mm, 16 mm and 12.5 mm), three ratios of coarse aggregate, fine aggregate (CA:FA) (50:50, 45:55, 40:60), presence of steel fibers, and specimens without and with guide notch were chosen as parameters of the study. Findings Load-crack mouth opening displacement curves indicate that for both fibrous and non-fibrous mixes, higher volume of aggregate and higher size of coarse aggregate have high fracture energy. Originality/value For all volumes of coarse aggregate, it was noticed that specimens with 12.5 mm aggregate size achieved highest peak load and abrupt drop post-peak. The decrease in coarseness of internal structure of concrete (λ) resulted in the increase of fracture energy.

Research Committee Report

1992 ◽  
Vol 16 (4) ◽  
pp. 3
Author(s):  
Carol Leiper
Keyword(s):  
Committee Report ◽  
Research Committee
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