顺纹

结果表明：竹层积材是一种低湿胀性材料，顺纹、径向和弦向上均远低于木材和LVL。

The results showed that the grading bamboo strand lamination is a low-swelling material . The swelling of parallel to grain , radial and tangential is lower than that of timber and LVL .

木材顺纹抗剪强度测试方法的改进

A New Test Method for Shear Strength Parallel to Wood Grain

GB/T1935-1991木材顺纹抗压强度试验方法

Method of testing in compressive strength parallel to grain of wood

GB/T1937-1991木材顺纹抗剪强度试验方法

Method of testing in shearing stength parallel to grain of wood

随塑化压力增大，单板的弹性模量有减小的趋势，顺纹抗拉强度呈增大趋势，但当压力增大到一定值时顺纹抗拉强度趋于稳定。

With the increase of the adhesive pressure , elastic modulus decreases .

原木弯曲度对顺纹抗压强度影响的研究

Effect of bowing rate of log on the compression strength parallel to grain

榆木顺纹压缩弯曲技术

The Techniques of Elm Longitudinal Compressing and Bending

毛竹顺纹抗拉性质的变异及与气干密度的关系

Variation in Tensile Properties and Relationship between Tensile Properties and Air-Dried Density for Moso Bamboo

GB/T15777-1995木材顺纹抗压弹性模量测定方法

Method for determination of the modulus of elasticity in compressive parallel to grain of wood

模板的加工橄榄球的加工木材顺纹抗拉强度试件的数控加工技术

The CNC processing technology of the wood testing part in tensile strength parallel to the grain

材料和工艺相同时，顺纹组坯时的胶合强度高于垂直纹理组坯时的胶合强度。

With same material and technics , bond strength of parallel lay-up is higher than upright lay-up .

顺纹抗拉强度主要受管胞长度、管胞强度、纤丝角度、结晶度等因子的控制。

Tensile strength is mainly controlled by tracheid length , tracheid strength , microfibril angle and crystalline degree etc.

在实验中，进行了木材的软化、木材顺纹压缩和弯曲定型，这也是该课题研究的主要方面。

In the experiments , the principal research is in proceeding timber softening , longitudinal compressing and molding fixing .

同一无性系林分中，优势木的木材气干密度、抗弯强度、抗弯弹性模量较大，顺纹抗压强度较小。

The wood density , bending strength and bending elastic modulus of dominant tree are higher than mean trees .

可以使用在对顺纹弹性模量及静曲强度要求高的地方。

That can be used in the situation where the demand of MOE and MOR parallel to grain is high .

晚材率、木材密度与顺纹抗压强度、抗弯弹性模量、抗弯强度呈正相关；

Latewood percent and wood basic density were separately correlated with CP , MOR and MOE in all treated trees .

在研究木材静态缓冲特性的基础上，对实验数据进一步分析处理，得到了木材静压大变形情况下顺纹和横纹方向的静态本构关系。

The static constitutive relation of the wood with large deformation is determined based upon the experimental data of the static compression tests .

木材声速的研究Ⅰ.声速与顺纹抗压强度、含水率等物理量的关系

Researches on sound velocity in woodi . The relations between sound velocity and compressive strength parallel to the grain and moisture content of wood

顺纹抗剪强度和抗弯强度有减小趋势，这与蠕变变形的积累和木材局部组织损伤和龟裂程度密切相关，对于无明显塑性变形和局部损伤的试件其强度无明显影响。

Shear strength and bending strength parallel to the grain tend to decrease , which is relevant to accumulated plastic deflection and cracking due to creep history .

变化较大的小试件拉伸与顺纹抗拉也在0.62以上。证实了这项研究方法的可靠性。

Most of the individual correlation coefficients were more than 0.7 , at least 0.62 in ten - sile strength , which demonstrated that this test method is reliable .

组坯结构与人造板性能关系的基础研究⑤材料和工艺相同时，顺纹组坯时的胶合强度高于垂直纹理组坯时的胶合强度。

Fundamentals of Wood Composites Properties : Mat Structure and Board Property Relationship With same material and technics , bond strength of parallel lay-up is higher than upright lay-up .

在实验过程和后期的技术分析中，对木材软化机理和技术条件、顺纹压缩机理和技术条件、木材最小弯曲曲率半径和多向弯曲实验、弯曲定型以及强度检测等方面进行了探索和分析。

In later technique analyzing and testing , soften and compress mechanism and condition , minimum bending radius , multi-direction bending test with fixing and strength examination have been done .

顺纹抗压强度广义遗传力为0.618，种源内顺纹抗压强度差异大于种源间，说明在种源选择的基础上再进行个体选择，效果会更好。

The broad sense heritability of was 0 . 618 . The variation coefficients of within each provenance was greater than that among provenances . That means that selection within a provenance might be efficient .

抗弯强度、顺纹抗压强度、横切面硬度和弦向横纹抗压强度4项指标的差异达0.05水平显著。

The difference in MOE of natural Korean Pine also reached 0.01 level of significance and MOR , radial crushing strength , hardness of cross section and tangential crushing strength reached 0.05 level of significance .

差异显著性t检验表明：气候和地形对米老排人工林林分胸径和树高影响均极显著，对米老排人工林木材密度、顺纹抗压强度和抗弯强度影响极显著或显著；

Different significance t test showed that both climate and terrain influenced extremely significantly on DBH and height and affected extremely significantly or significantly on density , compression strength parallel to grain and bending strength .

顺纹抗压强度、抗弯强度和抗弯弹性模量同木材相近，而试件破坏形式有很大区别。

The orthopaedy bamboo is similar to wood in the bending strength , compressive strength parallel to grain and modulus of elasticity in static bending , but the failure-shape of tested piece is different from wood .

毛竹的气干密度、基本密度、弦向干缩率、顺纹抗拉弹性模量和顺纹抗拉强度从竹青向竹黄方向变异很大，呈逐渐降低的趋势。

The basic properties ( including basic and air-dried density , the shrinkage rate , the tensile strength and the tensile modulus of elasticity parallel to grain ) of Moso bamboo at different locations were studied .

单板涂胶量对板材顺纹抗拉强度影响达到显著水平，板材密度对各力学性能影响均达到显著水平；其余因素各水平在试验选定范围内，并未对板材各性能指标有显著的影响。

Glued resin content affected longitudinal tensile strength significantly and the impacting of board density to all mechanical properties reached to a significant level . In the testing range other factors and levels affected the board properties indistinctively .

基本密度、顺纹抗压强度、顺纹抗拉强度和抗弯强度都随竹龄增加而增加，至3～5年较稳定。

The basic density , compression strength parallel to the grain , and tensile strength parallel to the grain and bending strength increase with the age , and reach their relative stableness values at the age of 3-5 years .

在此基础上，分析讨论了同一浸渍条件下不同辐照剂量对杨木增重率的影响，并挑选样品进行了顺纹抗压强度、横纹抗压强度的测定。

On this basis , analyzed and discussed the same impregnation conditions under different irradiation dose on the rate of weight gain Poplar , and the selection of samples for compressive strength parallel to grain , stripes and determination of compressive strength .