brittle adj. 1.易碎的,脆的;脆弱的;易损坏的。 2.虚幻的,靠不住的。 3.(声音等)尖利的;容易生气的。 4.(态度)冷淡的;利己的,专为自己打算的。 as brittle as glass 像玻璃一样容易打碎。 a brittle fame 浮名。 His promise turned out brittle. 他的诺言原来是靠不住的。 a brittle and selfish woman 一个态度冷淡自私自利的女人。 a brittle personality 容易生气的个性。 vi. 变脆。 -ly, brittly adv.,-ness n. 脆弱,脆性,脆度。 n. 薄片脆糖。 peanut brittle薄片花生糖。
fracture vt.,vi. (使)破裂;(使)折断;(使)断裂。 n. 1.破裂,折断,断裂。 2.裂痕,裂缝,裂面。 3.【医学】挫伤,骨折。 4.【矿物】断口;【地质学;地理学】断层。 a comminuted fracture 粉碎骨折。 a compound fracture 复合骨折。
Abstract : by means of metallographical examination and sem , the microstructure characteristics , macro - and microfractographs of the brittle broken wheel hull bolt of bj212 automobile have been studied . the results show that the thin - headed screw , with excessively deep carbonitriding layer and hardening layer , has less resistance to brittle fracture in the thin area of its head . at the root of the head connecting the stem , a tensile stress may emerge owing to the non - even quenching stress . those are the two reasons for low torque fracture of bolt 文摘:借助金相、扫描电镜等手段对低扭矩脆断的bj212汽车轮壳螺栓的金相组织特征,宏观和微观断口形貌等进行了研究,结果表明:这种头部薄的螺栓,渗层和淬透层过深,使头部薄区脆断抗力降低,在头部与杆的根部,由于淬火应力不均匀导致根部产生拉应力,均是导致螺栓低扭矩断裂的原因。