1、

The enhancement mechanism of hybrid fiber was investigated by observing the SEM photos of cross section. The main factors affecting the hybrid effect coefficient were presented and the relationship among this coefficient, transverse tensile strength and stress relaxation rate of NAFC materials was discussed.

利用扫描电镜(SEM)分析了材料拉伸断面形貌,探讨了混杂纤维增强机制,分析了混杂效应系数的主要影响因素,研究了混杂效应系数与材料横向抗拉强度和应力松弛率之间的关系。

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2、

The paper put forward a common solution of pile to be pressed to transverse load, it is suitable for variable cross-section pile.

本文提出了受横向荷载作用的桩的一般解析解,适用具有变截面及桩身通过不同土层的桩基,该法解题直观,计算量小,计算速度快,并且有较高的精度。

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This paper offers a new method to calculating torsion problem of a straight bar with rectangular cross section. A stress function is the displacement function of rectangular film in transverse vibration, which is an simple engineering calculating.

首先给出计算弹性矩形截面直杆扭转问题的一种新方法,笔者采用矩形膜振动位移函数做为求解该问题的应力函数。

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5、

The breakpoint is determined mainly by the frequency and nearly independent of the transverse dimensions of tunnels and the polarization modes. The greatest stress is found at the location on the cross section where V is the largest.

电导率断点主要受传播频率的影响,而与巷道横截面尺寸和极化方式几乎无关。最大应力出现在横截面上v为最大的地方。

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6、

The phenomenon of longitudinal fission seldom occurred during the process of tube plug drawing mill compared with empty-sunken steel tube. The problem which seldom cause transverse fissure in form of partial failure owing to uniform distribution of axial stress in cross section.

与空拔相比较,在短芯棒拔制过程中,纵裂现象一般不会发生,由于钢管轴向应力在横截面上分布均匀,一般也不会出现以局部破坏形式出现的横裂现象。

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A new point is put forward that transverse bimoment has different influence on the two kinds of cross section thin-walled beams, and on their St-Venant principle conditions.

同时对外载等效中经常出现的横向双力矩这一广义力进行研究,指出它在开口和闭口薄壁梁约束扭转问题中和圣维南原理适用条件中分别占有不同的地位。

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