因而可以推断干燥过程不是水稻应力裂纹形成的主要阶段,其应力裂纹的形成主要出现在干燥结束后和吸湿过程中。
It is concluded that the rough rice may be fissured after drying or during moisture adsorption. Through the experiments, the rough rice fissuring mechanism has been studied.
淬火裂纹:裂纹在钢材的淬火或淬火后形成,由于冷却时的高应力所造成;也有可能是在淬火油中的水所导致。
Quench Cracks: Cracks formed in a steel part during or after quench, resulting from high stresses in cooling; could be caused by water in the quench oil.
轴承零件在淬火冷却过程中因内应力所形成的裂纹称淬火裂纹。
Bearing parts in the process of hardening cooling by internal stress due to the formation of quenching cracks crack said.
高温蠕变损伤是由于过热引起的,过热使金相组织内部产生蠕变空洞,在热应力下空洞扩展连接而形成蠕变裂纹。
Creep damage is mainly caused by superheat. Because of superheat, creep cavities are formed inside microstructure, under heat stress condition, growth and join of cavities induce creep cracking.
利用MATLAB生成几组随机数来模拟参考裂纹尺寸和应力水平不同时的裂纹形成时间(TTCI)值,并以此检验了理论推导的正确性和合理性。
Finally, several groups of random Numbers were produced with MATLAB to simulate TTCI values when cracks propagated, with which correctness and rationality of theoretical deduction were verified.
认为,该曲轴材料的冶金缺陷是导致疲劳裂纹在正常工作应力下过早形成的原因。
The results show that metallurgical defect is the main reason leading to early formation of fatigue crack under normal working stress.
还会形成穿透型裂纹,造成镀层下本体金属的疲劳或应力腐蚀裂纹。
Through-thickness cracking also can lead to fatigue or stress corrosion cracking of the base metal beneath the plating.
焊趾处萌生的裂纹往往在垂直于作用应力方向沿着横向宽度在多处形成。
Cracks, growing at weld toe, tend to form at numerous sites along the transverse width perpendicular to the applied stresses.
弹孔周围的绝热剪切带沿主剪应力方向形成,与静态塑性变形滑移线方向接近,绝热剪切带上不均匀的变形将产生微裂纹和微孔洞。
An adiabatic shear band formed along the main shear stress around the penetrated hole is approximately consistent with the direction of plastic deformation slip lines in static state.
对含有35 %WC的钢结硬质合金在热应力作用下热疲劳裂纹形成过程进行了反复观察。
Thermal fatigue crack forming process of steel bonded carbide containing 35% WC by the action of thermal stress has been observed time and time again.
对于不同应力水平作用下的循环时间可计时累加并再现,可为疲劳裂纹形成寿命的预测提供依据。
The circle time under different stress level is accumulated and can be reappeared, so that the basis data is provided to predict surface fatigue crack forming life.
文中讨论了裂纹的形成和传播机制,并阐明了铜管出现应力腐蚀破裂的原因。
The formation and propagation mechanism of the cracks is discus - sed and the cause for the stress corrosion fracture in the brass pipe is elucidated.
此外,还定性分析了淬火、回火后残余应力的性质及热处理工艺过程对裂纹形成的影响。
In additions the paper qualitatively analyses the influence of residual stresses occurring after quenching and tempering and the process of heat treatment on the formation of the cracks.
在焊接过程中产生的动态应力应变及随后形成的残余应力,是导致焊接裂纹和接头性能下降的重要因素。
The dynamic stress-strain and welding residual stress during welding are the significant factors which lead to welded cracking and debasement of the joint properties.
同时,稀土使合金的热裂纹形成温度降低,增加了热裂纹形成应力,降低了合金的热裂倾向性。
Moreover, they are able to decrease the temperature and increase the stress of hot cracking formation, as a result, decrease the tendency of hot cracking.
结果为:原岩应力的存在有利于光面爆破的炮孔间贯通裂纹的形成,不利于预裂爆破的炮孔间贯通裂纹的形成。
Results indicate that the residual stress is useful to form the cracks between the shot-holes for smooth blasting, but not for pre-split blasting.
结果表明,焊缝金属中存在的非金属夹杂物,在低应力作用下形成微裂纹成为裂源,加之焊缝组织中存在大量的MA结构群,从而发生焊缝金属在室温下的解理断裂。
The results showed that nonmetallic inclusions in weld seam served as crack initiation site under external bend load, and large amount of m a structure resulted in cleavage fracture of weld seam.
表面裂纹萌生原因是拉杆在腐蚀性高炉煤气粉尘和轴向拉伸等工作应力的综合作用下,形成的应力腐蚀裂纹。
The initiation of the cracks was caused by stress corrosion resulting from the co-effect of the corrosive gas dust and the axial tensile stress.
由于铸坯表面裂纹形成的裂纹灶,降低了产生内裂所需要的应力值,易于形成内、外相连的纵裂。
The stress required for producing internal crack decreases since there are loci of cracks in the slab caused by the surface crack, so the longitudinal cracks from inner to surface form easily.
证明了用静应力场分析动载下接触疲劳裂纹形成与扩展的可靠性;
Static stress field can be reliably applied to analyse initiation and extension of contact fatigue cracks under motive load.
黏聚力形成的阻抗强度因子数值,与黏聚裂纹长度和材料极值拉伸应力存在数量关系。
The stress intensity factor of crack solids is a fracture mechanics index that denotes the effect of loading and crack geometry.
研究结果表明,前叉立管在周期应力作用的环境中使用,非常容易形成疲劳裂纹,由此导致了摩托车前叉立管的断裂现象。
The investigation shows that the vertical shaft of the front fork is subject to fatigue flaw due to the cyclic stress, which leads to the fracture of the vertical shaft.
预应变可以延长疲劳裂纹形成寿命,提高疲劳裂纹形成的抗力系数和裂纹形成的当量应力门槛值;
The pre-straining prolonged the fatigue crack initiation life, and increased resistance coefficient and equivalent stress threshold of the fatigue crack initiation.
并运用应力分布状况分析了裂纹可能的形成位置和扩展方向;
Stress distribution is used to analyse possible initiating origin and propagation directions of cracks.
总之,造成淬火裂纹的原因可能是上述因素的一种或多种,内应力的存在是形成淬火裂纹的主要原因。
In short, the causes of cracks caused by hardening of these factors may be one or more, the existence of internal stress is the main reason for the formation of quenching cracks.
采用多层过渡复合涂层可有效地缓和涂层内热应力,阻碍涂层内裂纹的形成及扩展,从而大幅度提高涂层的抗热震性。
The process of destruction included three steps, they were the crack's forming, expanding and spalling. The multi layer compound coatings remarkably raised the thermal shock resist…
结果表明,形成网格状裂纹的原因是,在镀铬前,样品表面局部区域就存在一些微裂纹及较高的残余应力。
The results show that the reason of developing cross flaw is some micro-cracks on the local area and high residual stress in the early of chrome-plating of the samples.
通过有色金属应力断料中的开拓性工作,从微细观层次上解释了应力切断断口上裂纹源的形成,以及裂纹扩展的物理过程;
The paper introduces the work which the author got from the development work of stress fracturing material emerged in the non ferrous metal.
水稻颗粒中心首先形成应力裂纹的可能性最大。
The fissuring of rice is more likely to be initiated at the center of the kernel.
微孔在应变应力作用下扩展,贯通,形成裂纹,穿过铁素体。
With increasing stress, small holes are created, gather, grow and finally become a crack that crossed ferrite grain.
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