竹材在压缩大变形下的力学行为Ⅰ. 应力-应变关系

邵卓平

doi:10.19455/j.mcgy.2003.02.004

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竹材在压缩大变形下的力学行为Ⅰ. 应力-应变关系
Mechanical Behavior of Bamboo with Large Deformation:Ⅰ. The Relationship between Stress and Strain
1. 安徽农业大学林产工业系,合肥,230036
2003年第2期页码：12-14
DOI： 10.19455/j.mcgy.2003.02.004

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[1]邵卓平.竹材在压缩大变形下的力学行为Ⅰ. 应力-应变关系[J].木材工业,2003(02):12-14+32.

SHAO Zhuoping. Mechanical Behavior of Bamboo with Large Deformation:Ⅰ. The Relationship between Stress and Strain[J]. China Wood Industry, 2003,(2):12-14.
[1]邵卓平.竹材在压缩大变形下的力学行为Ⅰ. 应力-应变关系[J].木材工业,2003(02):12-14+32. DOI： 10.19455/j.mcgy.2003.02.004.

SHAO Zhuoping. Mechanical Behavior of Bamboo with Large Deformation:Ⅰ. The Relationship between Stress and Strain[J]. China Wood Industry, 2003,(2):12-14. DOI： 10.19455/j.mcgy.2003.02.004.

摘要

以毛竹为对象,研究了竹材在不同温度及约束条件下沿径向、弦向和轴向压缩大变形下的力学行为,建立了描述竹材在压缩大变形下的应力-应变关系。试验表明,竹材在径向施压和弦向施压下具有相同的力学行为,其整个大变形过程可分为三个阶段:线弹性阶段、屈服后弱线性强化阶段和幂强化阶段。

Abstract

This study tested the mechanical behavior of Moso Bamboo （Phyllostachys pubescens） under large compression deformation at different temperatures and directions （radial, tangential and longitudinal） with restricting conditions. Based on the experimental data, the relationship between stress and strain was established. The results showed that bamboo revealed the same mechanical properties under compression in both radial and tangential directions. The entire deformation process could be divided into three stages: linear plasticity, feeble linearity strengthening after yielding, and power strengthening.