The strength of materials are controlled by porosity, modulus of elasticity, fracture energy and critical flaw sizes.
材料的强度是受气孔率、弹性模量、断裂能和临界缺陷尺寸控制的。
In view of the strength of materials, the operating condition and main failure mode of oil field equipment are analysed in this paper.
本文从材料强度的观点，分析了石油矿场机械的服役条件和主要失效类型。
Two important problems i. e. using the simplest method to DE - rive basic formula and using the plus assumption method in the strength of materials were discussed in this paper.
本文对用最简单的方法推导基本公式和“设正法”用于材料力学中两个重要问题提出商榷。
This value is used to compare the strength of materials, but a safety factor is applied when making design calculations, to bring the working stress well below the limit of proportionality.
此值被用来比较材料的强度，但是当设计计算时，要用一个安全系数，使工作应力低于比例限制。
It should be pointed out that upgrading the strength of materials to resist multi-shock fatigue is an effective approach to reduce the socket-breakage rate as well as to improve bit's service life.
并指出，提高材料抗多冲疲劳的强度将是减少钎头断裤率，延长其使用寿命的有效途径。
Research in the area of bridge design has been and still is concentrated on the study of the strength of materials and relatively few studies have been performed on traffic loads and their effects.
目前在桥涵设计的科研领域中，对材料和结构体系的研究占主导地位，而对于车辆荷载和以及车辆荷载效应的研究却相当少。
Fiber post can improve the strength of materials combined with polyurethane binder after 4 different surface treatments; the bonding strength of it is the greatest after hydrogen peroxide treatment.
结果证实经4种表面处理的纤维桩均能提高与聚氨酯黏结材料的黏结强度，过氧化氢处理后黏结强度最强。
The nanostructure of composites can also provide great mechanical strength in relatively light materials.
复合材料的纳米结构也能使较轻的材料具有很大机械强度。
The vaulting gives the house plenty of structural strength but does away with the need for energy-intensive materials such as reinforced concrete.
拱形结构为房屋提供了足够的结构强度而无需混凝土这样的能源密集型材料。
Engineers hope the can-crushing tests will prove the strength of thin materials, enabling rocket builders to design lightweight materials for future heavy-lift launch vehicles.
工程师们希望这次“压罐子”实验将验证这些轻巧材料的受力性能，从而使以后的火箭制造者们在未来更大起飞重量的航天器中可以尽可能的设计采用轻量化的材料。
Engineers need an understanding of the mechanical strength and corrosion resistance of various materials.
工程师需要了解各种材料的机械强度和耐腐蚀的能力。
Grasshopper is a foldable electric bicycle that turns into a trolley for easy transport. The use of composite materials provides rigidity and strength.
蚱蜢自行车是一种可折叠的电动自行车，它可以被折叠成手推车形，便于携带。复合材料的使用，保证了其硬度和强度。
Cause of the high cost of materials, spare parts, equipment failure, low efficiency, increase use the Labour strength of the workers.
造成材料、配件费用高，故障多，设备使用效率低，增加了工人的劳动强度。
Increase in the amount of MTES increases the tensile strength and decreases the ratio of elongation for breaking of the materials.
并且随着MTES量的增加，材料的拉伸强度增强而断裂伸长率逐渐降低。
Strength of materials is required for building dam shell for the sake of stability.
土石坝的坝壳材料主要为了保持坝体的稳定性，一般要求有较高的强度。
The orientations of polyurethanes resulted in a large number of the residual orientation , the stress softing and stress hysteresis , the permanent set , the higher modulus and strength of materials .
取向的结果，导致大量的硬段残留取向、应力软化、应力滞后和高变形，以及材料的高模量和高强度。
In general, most of the thermoplastic materials offer high impact strength, corrosion resistance, and easy processing with good flow characteristics for molding complex designs.
一般而言，大多数热塑性材料具有较高的抗冲击强度、耐腐蚀性以及良好流动性使其容易加工而适于复杂成型设计。
Many a strength of the enterprise, but also specially produced for enterprise introductions for customers as reviewing materials used.
很多有实力的企业，还专门制作了企业宣传片，以供客户作为考察资料用。
Clean collapse Cause of the high cost of materials, spare parts, equipment failure, low efficiency, increase use the Labour strength of the workers.
造成材料、配件费用高，故障多，设备使用效率低，增加了工人的劳动强度。
The ceramic-metal composite materials have the advantages of high hardness, strength, toughness and low density, and are widely used in bulletproof field.
陶瓷-金属复合材料具备高硬度、高强度、高韧性以及低密度的优点，已被广泛应用于防弹领域。
The conventional equipment for measuring the strength of various construction materials is the hydraulic material testing machine.
测量各种建筑材料强度值的常用设备是液压式压力试验机。
The single fiber fragmentation test has been used to determine the interfacial shear strength of composite materials.
单纤维段裂试验作为复合材料界面剪切强度的一种测试方法被沿用至今。
The addition of PS can reduce the dielectric constant of glass-ceramic substrate materials effectively, but reduce the flexural strength at the same time.
在玻璃陶瓷基板材料中加入PS有机球能有效地降低基板的介电常数，但同时影响基板的抗折强度。
For an incident shock wave, the strength of reflected shock waves from the boundary of different materials are calculated theoretically.
从理论上计算了同一强度的入射冲击波在不同材料界面上产生的反射冲击波强度。
Finally, the effects of defects on the strength of samples were investigated. The strength diagram of materials with crack was calculated and was also compared with experimental results.
最后，本文讨论了样品中的缺陷对强度的影响，通过计算得出含裂纹材料的强度曲线图，并与实验结果进行了比较验证。
Selection of materials. The bridge designer can select from a number of modern high-strength materials, including concrete, steel, and a wide variety of corrosion-resistant alloy steels.
桥梁设计者能选用大量的现代高强材料，包括混泥土，钢筋，和多种耐腐蚀的合金。
Based on the micro mechanical feature of materials and the strength theory of fibrous bunchiness, the macro statistical size effect of materials was gained.
从材料的微观力学性质入手，用纤维束强度理论，得到了材料的宏观统计力学效应。
Based on the size effect of structure fracture and the strength theory of fabric bundles, the macro statistical scaling effect of materials is achieved.
从结构破坏的尺寸效应入手，利用纤维束强度理论，得到了材料的宏观统计力学效应。
Based on the size effect of structure fracture and the strength theory of fabric bundles, the macro statistical scaling effect of materials is achieved.
从结构破坏的尺寸效应入手，利用纤维束强度理论，得到了材料的宏观统计力学效应。
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