Study on Strain Character of Malan Loess with Damage

Abstract:

Compress Experiment result shows that the unsaturated Malan loess has strong structure, the structure strength is linear decreasing with the increasing of water content, and the character of stress-strain relationship is soften type. Although the relationship can be described by hyperbolic function, it is difficult to decide the residual strength in function. Based on the hypothesis of damaging to rigidity degree, when damage developing function is introduced to unsaturated loess, the soften type relationship of stress-strain can be described by a linear constitutive Equation with damage variation. Analyzing and comparing the research result shows the soften type stress-strain relationship can be described well by the constitutive function with damage.

• Periodical: Applied Mechanics and Materials (Volumes 71-78)
• Pages: 4887-4893
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.71-78.4887
• Online since: July 2011
• Authors: Bin Lin, Zhi Bo Chen, Tao Ma
• Keywords: Constitutive Formula, Damage, Loess, Soften Type Stress-strain Relationship

References

[1] Guorui Gao, The Discussing of Lanzhou Loess Microstructure and Collapsible Mechanism[J], Journal of Lanzhou University, 1997(1).

[2] Guorui Gao, The Loess Microstructure Classification and Collapsibility[J], Science China, 1980(12): 1203-1209.

[3] Dingyi Xie, Jiling Qi, Soil structure characteristics and new approach in research on its quantitative parameter[J], Chinese Journal of Geotechnical Engineering, 1996, 12(6).

[4] Songyan Yang, Maohong Yu, Saturated and unsaturated medium elastoplastic damage model [J], Acta Mechanica Sinica, 2000, 32(2): 198-206.

[5] Zudian Liu, The Loess Mechanics and Engineering, xi'an：Shanxi Science and Technology Publish House , 1996. 8.

[6] Lizhong Wang, Li Ding, Subsection characteristics research of structural soft soil stress-strain relationship[J]. The ninth soil mechanics and geotechnical engineering academic conference proceedings of China Civil Engineering Society [C], BeJing: (2003).