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·ml/2.Key words:crack opening displacement (COD); single edge notched bending (SENB); plasma enhanced chemical vapor deposition (PECVD); fracture toughness; nanoindentation...Mechanical properties of AISI 1045 ceramic coated materials by nano indentation and crack opening displacement methodWANG Yan-rong(王燕荣), WANG Yi-qi(王一奇), HUI Zhi-peng(惠志鹏), SONG Jung-il(Department......
板坯角横裂纹在轧后钢板边部的延展行为刘洋1,顾林豪1,李战军1,王文军1,吕延春1,王海宝1,姜中行1(1.北京市首钢技术研究院)摘 要:对板坯角横裂纹在轧后钢板边部的延展行为进行了实验室和工业试验研究.得出:随着钢板轧制厚度的增加,铸坯角部横裂纹沿宽度方向延展有加重的趋势;轧制规格相对较薄的钢板的裂纹极微小,有被"撵平"的趋势;毛边钢板的安全切边量为35mm.关键词:板坯； 角横裂纹； 切边量； 钢板边裂......
Crack detection of reinforced concrete bridge using video imageXU Xue-jun(许薛军)1, 2, ZHANG Xiao-ning(张肖宁)1(1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China;2. Administration Bureau for Highway of Guangdong Province, Guangzhou 510075,China)Abstract:With the digital image technology, a crack detection method of reinforced concrete......
轧制加工低合金板钢表面边部裂纹机制研究徐震1,华蔚1,江来珠1(1.上海市宝钢股份有限公司)摘 要:通过"模铸+初轧"工艺轧制低合金钢锭时,钢板易在表面距边部100 mm左右易出现直线型裂纹,裂纹或深或浅,有规律,导致报废量大大增加,影响了正常生产.该类缺陷曾被认为是轧制缺陷,从宏观形貌及微观组织等多方面研究缺陷形成机制,判定源于钢锭表面内在和外在微裂纹缺陷,初轧轧制时轧件在受到拉应力最大的地方产生开裂,从而为产品质量改进提供了理论依据,通过采取有效的技术措施,大大减少了该类缺陷发生的几率. 关键......
Fractal analysis of crack paths in Al2O3-TiC-4%Co composites LI Jing(李 静)1, 2 , YIN Yan-sheng(尹衍升)1 , LIU Ying-cai(刘英才)1, MA Lai-peng(马来鹏)3 1. Institute of Materials Science and Engineering...%. The crack paths, generated by Vickers indentation on the polished surfaces of both composites, were analyzed from a fractal point of view to distinguish the possible toughening mechanisms involved......
; (13) The normalized analytical values of and can be estimated from eq.(12) as 0.884 and 0.451, respectively. The inclined edge crack problem (Fig. 8) has been...;for rectangular specimen containing inclined edge notch using different number of elements along crack (L/b=0.1) The crack propagation process in rock samples has been studied by several researches using......
edge crack is considered and the boundaries are marked by thick lines. 4 MPs (i.e., M1, M2, M3 and M4) are used to cover the PD. PPs can be obtained by cutting each MP with domain boundaries and internal... with four possible crack propagating directions. In case 1 and case 3 the crack extends to element node, while in case 2 and case 4 the crack extends to element edge. In case 1 and case 4, the PPs......
is employed around the crack tip to model the edge crack (a/W=0.3, a/L=0.05) in the present numerical experiment, as shown in Fig.4. The level of nonhomogeneity is considered, which will result in the elastic...J. Cent. South Univ. Technol. (2010) 17: 1177-1184 DOI: 10.1007/s11771-010-0615-0 Crack tip higher order stress fields for functionally graded materials with generalized form of gradation YAN Xiu......
which have major effects on the edge crack location and strain distribution along die profile radius in the flange. Non-axisymmetric stretch flanging process of AA-5052 sheet metal blanks was carried..., which leads to faster edge crack propagation. A close agreement is found between simulation and experimental results in terms of location of edge crack and forming load. Key words: stretch flanging......
of temperature gradient and dendritic spacing in the front edge of the solid-liquid interface, and the nucleation and propagation process of crack were studied.It is shown that the bending deformation...RESEARCH ON THE FORMATION MECHANISM OF INTERNAL CRACK IN THE CONTINUOUS CASTING SLAB S.Y. Chen1,X.D. Yue1,G.W. Chang1,G.C. Jin1 (1.Department of Materials & Chemical Engineering, Liaoning Institute......
