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OALib Journal期刊
ISSN: 2333-9721
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水热-微波处理水曲柳顺纹压缩应力-应变本构关系
DOI: 10.3969/j.issn.1000-2006.2013.04.020, PP. 105-109
Keywords: 水曲柳,顺纹压缩,幼龄材,成熟材,应力-应变规律
Abstract:
通过对水热-微波联合处理的水曲柳幼龄材和成熟材顺纹压缩过程中应力-应变关系和木材化学组分变化的分析,建立木材顺纹压缩应力-应变本构关系。结果表明:在水曲柳顺纹压缩的初始阶段,应力-应变符合线性的弹性虎克定律;在弹塑性阶段,也基本符合线性的力学关系,建立的水曲柳幼龄材和成熟材顺纹压缩应力-应变本构关系由常数项(比例极限应力)和应力-应变线性关系表达式两部分构成;相同顺纹压缩率下幼龄材弹性模量和应力大于成熟材,主要受到木材化学组分差异的影响。
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