Modeling of Cyclic Plane Strain Response of Toyoura Sand

2010 ◽  
Author(s):  
Md. Raquibul Hossain ◽  
Mohammed Saiful Alam Siddiquee ◽  
Syed Ishtiaq Ahmad
Keyword(s):  
Plane Strain ◽  
Strain Response ◽  
Toyoura Sand

An Evaluation of the Neuber and Glinka Relations for Monotonic Loading

1992 ◽  
Vol 59 (2S) ◽  
pp. S50-S56 ◽  
Author(s):  
W. N. Sharpe ◽  
C. H. Yang ◽  
R. L. Tregoning
Keyword(s):  
Plane Strain ◽  
Plane Stress ◽  
Low Cycle Fatigue ◽  
Notch Root ◽  
Strain Range ◽  
Local Strain ◽  
Strain Response ◽  
Cycle Fatigue ◽  
Stress Concentrations ◽  
Strain Model

The Neuber relation is widely used to compute elastoplastic stresses and strains at stress concentrations, but a newer relation has been developed by Glinka. Prediction of local strain response is important because low cycle, fatigue life models are based on the strain range. The effects of notch root constraint on the response have been difficult to predict or measure. This paper evaluates the abilities of six models of notch root behavior by comparing them with experimental results over a range of constraints. The models are: the Neuber model, the Neuber model as modified by Walker, the Glinka models for plane stress and for plane strain, and two modifications of the Glinka models that are presented in this paper. Comparisons are made with strains measured at the roots of notches by resistance gages or by laser-based interferometry; data come from previous works as well as some new results of the authors. The constraints vary from plane stress to plane strain with several intermediate cases. Conclusions must take into account the fact that elastoplastic strain measurements have scatter arising from the gage length relative to the grain size. But, in general, one can say that the Neuber model is best for plane stress and the Glinka plane-strain model is best for very large constraint. Response for intermediate amounts of constraint are predicted better by one of the other models.

Experimental Characterization of Mechanical Behavior of Cord-Rubber Composites

1982 ◽  
Vol 10 (1) ◽  
pp. 37-54 ◽  
Author(s):  
M. Kumar ◽  
C. W. Bert
Keyword(s):  
Response Characteristic ◽  
Cord Compression ◽  
Complete Characterization ◽  
Strain Response ◽  
Strain Gages ◽  
Experimental Characterization ◽  
Rubber Composites ◽  
Stress Strain ◽  
Strain Data

Abstract Unidirectional cord-rubber specimens in the form of tensile coupons and sandwich beams were used. Using specimens with the cords oriented at 0°, 45°, and 90° to the loading direction and appropriate data reduction, we were able to obtain complete characterization for the in-plane stress-strain response of single-ply, unidirectional cord-rubber composites. All strains were measured by means of liquid mercury strain gages, for which the nonlinear strain response characteristic was obtained by calibration. Stress-strain data were obtained for the cases of both cord tension and cord compression. Materials investigated were aramid-rubber, polyester-rubber, and steel-rubber.

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