主应力

The maximum stress theory was combined with failure index of strength. Tensile strength of laminates was obtained on the analysis of 0° ply.

使用最大应力准则和强度破坏指标相结合的方法，根据主承力层的失效得到层合板的抗拉强度。

The direction of the maximum principal compressive stress axis in the area is trending NEE.

从浅源地震的震源机制分析发现，研究区平均最大主压应力方向为NEE-SWW向。

Through synthetical analysis of solutions of focal mechanism and the study of crustal deformation observation data, the recent stress field of hypocenters in Fujian and its coastal area has been obtained, which is considered to links up the stress field in Taiwan and Taiwan Strait, and the dominant direction of axis of principal compressive stress is NW-SE.

综合地震震源机制解和地壳形变观测资料的研究，求得福建及其沿海地区现代震源应力场，认为这与台湾地区、台湾海峡应力场相互衔接，主压应力轴优势方位为NW-SE向，力轴仰角较小，应力场近于水平挤压，形变场反映近期福建沿海亦受北两方向，接近与海岸垂直的挤压力。

Derives the formulae for calculating the distortion and stress on the acting surface of flexspline load in the drive process of the harmonic gear drive with three-wave wavegenerator;(2) analyzes and compares the performance of plastic and steel products under light load drive and calculates the probably reached limit of drive ratio for both types of flexsplines under the same load;(3) applies the harmonic gear drive with three-wave wavegenerator to the small-sized multiple-revolution electric device of valves by taking into consideration of the low limit of the drive ratio for the harmonic gear drive with three-wave wavegenerator made of plastics, improves the design on the main drive mechanism of the traditional small-sized multiple-revolution electric device of valves, and validates through examples the feasibility for the harmonic gear drive with three-wave wavegenerator made of plastics to be applied to the small-sized multiple-revolution electric device of valves. Finally the author performs calculations on the two types of the flexsplines of the harmonic gear with three-wave wavegenerator by using the finite element method and analyzes the causes for the errors.

本文根据三波谐波齿轮传动的运动变形特点，采用弹性薄壳的力矩理论，推导了三波谐波齿轮传动柔轮载荷作用面上的变形及应力计算公式；分析比较了轻载传动情况下塑料和钢材的性能，计算了塑料制谐波柔轮和钢制谐波柔轮在相同载荷情况下可能达到的传动比极限；对塑料制及钢制三波谐波齿轮柔轮进行了有限元计算，分析了产生误差的原因；针对三波塑料谐波齿轮传动比极限低的特点，将之运用于小转矩多回转阀门电动装置中，对传统的小型多回转阀门电动装置的主传动机构进行了改良设计，并通过实例验证了三波塑料谐波齿轮传动在小转矩多回转阀门电动装置中应用的可行性。

The voltage stress of each main switch is only half of the input voltage.

其主开关管的电压应力均为输入电压的一半。

These T-stress effects depend on the sign and the magnitude of the T-stress as well as on the geometry of the microcrack arrangement.

当考虑T应力影响时，各向异性材料中的微裂纹对主裂纹的屏蔽效应比相同情况下各向同性材料中的微裂纹屏蔽效应更显著。

In every state of stress there exist at least three principal planes, which are mutually perpendicular.

对每一种应力状态，至少存在三个主平面，它们互相垂直。

Numerical results show that,under the NNW to SSE extension in the region,a large amount of discordant dextral strike slip along the hidden fault is required to produce a similar map of the curved trajectory of the larger horizontal stress above.

计算结果表明，当北北西-南南东向的区域性拉张叠加上沿着隐伏断层发生不协调的右行走滑时，水平大主压应力迹线在隐伏断层上方出现类似的弧形展布。

This paper uses principal curvature , plane stress and structure filtering to evaluate the development of fracture at geology shape, mechanical and signal handle facet.

本文应用主曲率分析技术、平面应力分析技术、构造滤波技术，从地质形态、力学角度、信号处理的角度给出了地质构造的裂缝发育评价。

For some calculating cases, it is analyzed that how the primary shearing stress and the average film thickness change during the whole course from the beginning to the end of meshing.

对部分算例，分别分析了一对轮齿从入齿到脱啮的整个啮合过程中最大主剪应力和平均油膜厚度的变化规律。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。