Damage and Stress State Influence on Bauschinger Effect in Aluminum Alloys
Mark F. Horstemeyer
James C. Newman
Steven R. Daniewicz
John M. Papazian
Kirk H. Schulz
Mark F. Horstemeyer
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Semantic Scholar extracted view of "Damage and Stress State Influence on Bauschinger Effect in Aluminum Alloys" by Brian Jordon et al.
19 Figures and Tables
Figure 1.1. A stress-strain curve that exhibits the Bauschinger effect for typical metallic alloys (Xiang and Vlassak, 2005).
Figure 2.1. Schematic of the fictitious material with increasing nucleation density and void growth of a model framework (Horstemeyer, 1999)
Figure 3.1. Optical micrograph of the grain structure in the rolling direction of 7075- T651 aluminum alloy.
Table 3.1. Chemical Composition and Elongation at Failure for 7075-T651 and A356-T6 Aluminum Alloys
Figure 3.2. Optical micrograph A356-T6 cast aluminum alloy which shows second phase particles (Horstemeyer et al., 2003).
Figure 3.3. High cycle fatigue specimen design employed for the Bauschinger Effect experiments on the 7075-T651 alloy.
Figure 4.1. Half-cycle true-stress true-strain data for 7075-T651 longitudinal direction comparing the compression followed by tension to tension followed by
Table 4.1. Comparing BSP, and ratio of kinematic to isotropic hardening for the Bauschinger tests at various pre-strain levels for 7075-T651 and A356-T6 aluminum alloys.
Figure 4.2. Half-cycle true-stress true-strain data for A356-T651 comparing the compression followed by tension to tension followed by compression.
Figure 4.3. Monotonic data for A356-T651 and 7055-T651 comparing the difference between the tension and compression flow stress
Figure 4.4. The Bauschinger Effect Definition (BED) plotted versus the maximum forward pre-strain reached before reversal.
Figure 4.5. The Bauschinger Stress Parameter (BSP) and Ratio of Kinematic and Isotropic Hardening (RKI) plotted versus the maximum forward pre-strain reached before reversal for 7075-T651 and A356-T6.
Figure 4.6. A plot of the Bauschinger Stress Parameter (BSP) as a function of the maximum forward pre-strain reached before reversal.
Figure 5.1. The one-element FE model using an ISV plasticity-damage model is able to capture the Bauschinger effect for 7075-T651 wrought aluminum alloy
Figure 5.2. The one-element FE model using an ISV plasticity -damage model is able to capture the Bauschinger effect for A356-T6 cast aluminum alloy.
Figure 5.3. A comparison of the damage nucleation model and experimental data of the void/crack density versus strain for A356-T6 and 7075-T651. The plot
Figure 6.1. The experimental and finite element model of the Ratio of Kinematic and Isotropic Hardening (RKI) plotted versus the maximum forward prestrain reached before reversal for 7075-T651 and A356-T6.
Table A.1. Microstructure-property (elastic-plastic) model constants for A356-T6 and Aluminum 7075-T651.
Table A.2. Microstructure-property (damage) model constants for A356-T6 and 7075- T651 aluminum alloys.
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