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,温度低且固液反应时间不充分,润湿性较差并有可能出现非冶金反应区.另一方面,由于此处脆硬的金属间化合物产生导致应力集中,成为接头的薄弱点.完全在界面层断裂时,此参数条件下黄铜发生较大量熔化形成厚度较大的化合物层,拉伸过程中,界面层首先发生脆化,界面上部界面层的连接强度小于焊缝. 图13 不同激光功率条件下接头拉伸应力-应变曲线 Fig. 13 Stress-strain... with filler wire[J]. The Chinese Journal of Nonferrous Metals, 2015, 25(4): 975-981. [13] LI C L, FAN D, YU X Q, et al. Residual stress and welding distortion of Al/steel butt joint by arc-assisted laser......
South University, 2014: 11-52. [31] 唐礼忠, 汪令辉, 张君, 等. 大规模开采矿山地震视应力和变形与区域性危险地震预测[J]. 岩石力学与工程学报, 2011, 30(6): 1168-1178. TANG Lizhong, WANG Linghui, ZHANG Jun, et al. Seismic apparent stress......
,泊松比趋向于稳定.当应力水平在10~16 MPa范围内时,泊松比基本保持不变(0.24~0.25). 图4 应力与泊松比的关系 Fig. 4 Relationship between stress and Poisson's ratio 使用半桥标定并得出传力棒的物理性质参数后,需要对应变片输出电压和荷载之间的关系进行标定.考虑到室内原型试验中的室内温度补偿,导线热效应,偏心以及灵敏度较低等影......
]. The extruded filament can be in-situ cured after the crosslinked polymerization reaction [21]. As 3DGP is conducted at room temperature, no thermal stress is generated during the printing process. Besides... of 3.8 μm. Comprehensive mechanical performance was also achieved, with hardness of HRC60, bend strength of 3000 MPa, and impact energy 20-26 J. Figure 10 (a) SEM images, (b) stress-strain curve, and (c......
copper sample were prepared with the same preparation process and conditions for better comparative analysis. The stress-strain curves of the prepared samples are shown in Figure 4. Obviously, the yield..., the elongation of the 0.4 CQD/Cu composite is only 1/3 that of the carbon materials. And as the carbon content increases, the strength increases while the elongation decreases. Figure 4 Tensile stress-strain......
of as-cast solder alloys The stress-strain curves of the SAC305, SAC305-1Bi, and SAC305-2Bi solder alloys showed deformation behavior in three states: elastic deformation, plastic deformation, and fracture point. The addition of 1 and 2 wt.% Bi increased the stress of the solder alloys (Fig. 6(a)). The Bi addition also increased the mechanical performance in terms of ultimate tensile strength (UTS......
of activated minerals [M]. Amstedam: Elsevier, 2000. [19] POURGHAHRAMANI P, FORSSBERG E. Changes in the structure of hematite by extended dry grinding in relation to imposed stress energy [J]. Powder......
(for example water) and the liquid surfaces of water-filled capillaries are concave on agglomerate surfaces as shown in Figure 2. Capillary stress is the main cause of wet pellet strength. The bridge binding......
Biao, LI Ji-kai, LI Ming-yang. Numerical and experimental studies of a wet multidisc clutch on temperature and stress fields excited by the concentrated load [J]. Triboligy Transactions, 2019, 62(1......
, 2016, 23(3): 544-554. DOI: 10.1007/s11771-016-3101-5. [21] LITVIN F L, FUENTES A, HAYASAKA K. Design, manufacture, stress analysis, and experimental tests of low-noise high endurance spiral bevel......