Constitutive modeling of plastically deformed and damaged bamboo under monotonic increasing uniaxial compressive load and cyclic uniaxial compressive load using the principles of continuum damage mechanics and the theory of endochronic plasticity
| Main Authors: | Fozao D.S., Foudjet A.E. |
|---|---|
| Format: | info publication-other |
| Bahasa: | fra |
| Terbitan: |
, 2019
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/3518917 |
Daftar Isi:
- 1. General objective The general objective of this work is to study the behaviour of bamboo culms under the monotonic increasing and cyclic uniaxial compressive loading regimes. 2. Specific objectives • To carry out laboratory tests on the bamboo species Oxtenanthera abyssinica, found in the Congo Basin Rain Forest, using the monotonic and cyclic uniaxial compressive loading regimes. • To determine the constitutive relationship of damaged bamboo under these loading regimes. • To compare the stress-strain curves of the test specimens of bamboo culms produce from the test data and those produced using the constitutive relationships developed. 3. Problem Statement and Research Hypotheses Bamboo is an example of an engineering material that can be used to build structures in adverse situations such as under wind loads and in earthquake prone areas. Bamboo culms contain micro cracks which result from natural factors such as wind loads and environmental climatic changes. With the advances in technology and for economic reasons, the inelastic behaviour of engineering materials must be taken into consideration when designing engineering structurers to resist very heavy loads. Although some amount of effort has been directed at determining the characteristics of bamboo, very little has been done on the study of its behaviour under loading. No mathematical models exist that can be used to model its behaviour under monotonic as well as cyclic uniaxial compressive loading. Therefore, the hypothesis of this research work is that: “the behaviour of cracked bamboo subjected to monotonic uniaxial compressive loading or cyclic uniaxial compressive loading beyond its elastic limit can be predicted using analytical formulations”.