scholarly journals Modeling Stress‐Strain Behavior of Ceramic Composites

2021 ◽  
Author(s):  
Ronald Kerans
Keyword(s):  
Ceramic Composites ◽  
Stress Strain ◽  
Strain Behavior ◽  
Modeling Stress

Effects of Inclusions and Porosity on the Indentation Response

2002 ◽  
Vol 750 ◽  
Author(s):  
E. S. Ege ◽  
Y.-L. Shen
Keyword(s):  
Heterogeneous Systems ◽  
Ceramic Composites ◽  
Ductile Material ◽  
Porous System ◽  
Stress Strain ◽  
Soft Matrix ◽  
Strain Behavior ◽  
Hard Particles ◽  
Strain Responses ◽  
Indentation Response

ABSTRACTA combined numerical and experimental study was undertaken to investigate the effect of microstructural heterogeneity on indentation response. Finite element analyses were carried out to simulate the stress-strain behavior and the indentation response of two model heterogeneous systems: one with hard particles embedded within a soft matrix and the other with a pore-containing ductile material. For the particle-containing system, the indentation response consistently overestimates the overall strength of the composite. This is largely due to the localized increase in particle concentration directly underneath the indent. For the porous system, the indentation response consistently underestimates the overall strength due to the pore-crushing effect. Experiments on metal-ceramic composites confirmed the non-correspondence between the indentation and stress-strain responses, even when the indent size is much greater than the microstructural feature size. Implications of the present findings in utilizing indentation to quantify surface mechanical properties are discussed.

Fiber Fracture in Continuous Fiber Ceramic Composites: Concepts and Observations

1995 ◽  
Author(s):  
K. Reifsnider ◽  
K. Liao ◽  
M. McCormick ◽  
A. Tiwari
Keyword(s):  
Tensile Strength ◽  
Ceramic Composites ◽  
The State ◽  
Continuous Fiber ◽  
Fiber Fracture ◽  
Stress Strain ◽  
Strain Behavior ◽  
Physical Measurements ◽  
State Of Affairs ◽  
Strength Models

The knowledge of fiber behavior in CMCs is rather modest, and models tend to be based on concepts that are less than complete. The present paper addresses several aspects of this problem. Fundamental assumptions for tensile strength models are discussed, and some basic modeling approaches are described. The effects of fiber fracture on the quasi-static stress-strain behavior are described (from physical measurements), and some models of that behavior discussed. Finally, a summary of the “state of affairs” for this subject will be attempted, and the needs for further investigation, especially to support improved modeling, will be presented.

scholarly journals Mathematical Models for Stress–Strain Behavior of Nano Magnesia-Cement-Reinforced Seashore Soft Soil

Mathematics ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 456 ◽  
Author(s):  
Wei Wang ◽  
Yong Fu ◽  
Chen Zhang ◽  
Na Li ◽  
Aizhao Zhou
Keyword(s):  
Mathematical Models ◽  
Soft Soil ◽  
Stress Strain ◽  
Strain Behavior ◽  
Hardening Behavior ◽  
Softening Behavior ◽  
Modeling Stress ◽  
Conventional Models ◽  
Strain Hardening Behavior ◽  
Mathematical Characteristics

The stress–strain behavior of nano magnesia-cement-reinforced seashore soft soil (Nmcs) under different circumstances exhibits various characteristics, e.g., strain-hardening behavior, falling behavior, S-type falling behavior, and strong softening behavior. This study therefore proposes a REP (reinforced exponential and power function)-based mathematical model to simulate the various stress–strain behaviors of Nmcs under varying conditions. Firstly, the mathematical characteristics of different constitutive behaviors of Nmcs are explicitly discussed. Secondly, the conventional mathematical models and their applicability for modeling stress–strain behavior of cemented soil are examined. Based on the mathematical characteristics of different stress–strain curves and the features of different conventional models, a simple mathematical REP model for simulating the hardening behavior, modified falling behavior and strong softening behavior is proposed. Moreover, a CEL (coupled exponential and linear) model improved from the REP model is also put forth for simulating the S-type stress–strain behavior of Nmcs. Comparisons between conventional models and the proposed REP-based models are made which verify the feasibility of the proposed models. The proposed REP-based models may facilitate researchers in the assessment and estimation of stress–strain constitutive behaviors of Nmcs subjected to different scenarios.

Fiber Fracture in Continuous Fiber Ceramic Composites: Concepts and Observations

1997 ◽  
Vol 119 (1) ◽  
pp. 205-211 ◽  
Author(s):  
K. Reifsnider ◽  
K. Liao ◽  
M. McCormick ◽  
A. Tiwari
Keyword(s):  
Tensile Strength ◽  
Ceramic Composites ◽  
The State ◽  
Continuous Fiber ◽  
Fiber Fracture ◽  
Stress Strain ◽  
Strain Behavior ◽  
Physical Measurements ◽  
State Of Affairs ◽  
Strength Models

The knowledge of fiber behavior in CMCs is rather modest, and models tend to be based on concepts that are less than complete. The present paper addresses several aspects of this problem. Fundamental assumptions for tensile strength models are discussed, and some basic modeling approaches are described. The effects of fiber fracture on the quasi-static stress–strain behavior are described (from physical measurements), and some models of that behavior discussed. Finally, a summary of the “state of affairs” for this subject will be attempted, and the needs for further investigation, especially to support improved modeling, will be presented.

Stress Strain Behavior of Steel Fibre Based Concrete in Compression

2012 ◽  
Vol 1 (3) ◽  
pp. 32-38
Author(s):  
Tantary M.A ◽  
◽  
Upadhyay A ◽  
Prasad J ◽  
◽  
...  
Keyword(s):  
Steel Fibre ◽  
Stress Strain ◽  
Strain Behavior
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