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首页> 外文期刊>Ciencia Florestal >VARIA??O DOS MóDULOS DE ELASTICIDADE E RUPTURA EM MADEIRA DE CEDRO-AUSTRALIANO POR MEIO DE ENSAIOS N?O DESTRUTIVO E DESTRUTIVO
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VARIA??O DOS MóDULOS DE ELASTICIDADE E RUPTURA EM MADEIRA DE CEDRO-AUSTRALIANO POR MEIO DE ENSAIOS N?O DESTRUTIVO E DESTRUTIVO

机译：通过非破坏性和破坏性测试，澳大利亚雪松木材的弹性和断裂模量变化

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The elastic of modulus is an important mechanical property in the design of timber structures, so obtaining it through several methods needs to be evaluated. This study aimed to evaluate the use of an efficient technique for determining the apparent longitudinal modulus taking into account the relationship range/height ( L/h ) and the influence of the shear modulus by comparing non-destructive tests with static bending tests. The wood used in paper was Toona ciliata M. Roemer (Australian cedar). Non-destructive tests were performed with the techniques of longitudinal and transverse vibration. It was concluded that the assay of longitudinal vibration is most suitable method to obtain the apparent longitudinal elasticity modulus, because the shear forces that occur due to the shear stresses are not significantly influenced by the variations of the ratio L/h . It was also possible to conclude that the relationship range/height, currently 21 in ABNT’s standards, may be replaced by 20, when determining apparent longitudinal elasticity modules and modulus of rupture, through the static bending and free transverse vibration tests.
机译：模量弹性是木材结构设计中的重要机械性能，因此需要评估通过几种方法获得的弹性。本研究旨在通过将无损测试与静态弯曲测试进行比较，考虑到关系范围/高度（L / h）和剪切模量的影响，来评估确定表观纵向模量的有效技术的使用。纸上使用的木材是Toona ciliata M. Roemer（澳大利亚雪松）。使用纵向和横向振动技术进行了无损检测。结论是，纵向振动试验是获得表观纵向弹性模量的最合适方法，因为由剪切应力引起的剪切力不受比率L / h的变化的显着影响。还可能得出结论，当通过静态弯曲和自由横向振动测试确定表观纵向弹性模量和断裂模量时，ABNT标准中的关系范围/高度（当前为21）可以替换为20。

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