Analytical Modeling of Morpho-Elastic Behavior and Failures in Bamboo

Abstract

This study aims to model and predict the morpho-elastic behavior and failures of bamboo material characterized by intricate growth and inherent anisotropy. An experimentally validated continuum physics-based deformation model is developed using a growth-elastic decomposition framework and is evaluated against uniaxial and biaxial tension-compression data from the literature, achieving prediction errors below 3% and 5%, respectively. The model also utilizes an octahedral shear stress-based failure criterion to accurately predict the uniaxial and biaxial failure stresses of bamboo and construct the associated biaxial failure envelopes. Later, parametric studies are conducted to evaluate the impact of growth and anisotropy on the morphoelastic response and failures of bamboo. The results show that changes in growth, fiber orientation, biaxiality ratio and anisotropic stiffening alter the mechanical behavior of bamboo. � 2026 World Scientific Publishing Europe Ltd.