PMMA的失稳断裂与断口形态 |
| |
引用本文: | 盛季生,赵亚溥.PMMA的失稳断裂与断口形态[J].南通大学学报(自然科学版),2002,1(2):44-47. |
| |
作者姓名: | 盛季生 赵亚溥 |
| |
作者单位: | 1. 南通工学院,江苏,南通,226007 2. 中国科学院力学所,北京,100080 |
| |
基金项目: | 中科院力学所LNM国家重点开放研究实验室项目 |
| |
摘 要: | 用超声波断口图和扫描电镜(SEM)研究了聚甲基丙烯酸甲酯(PMMA)的失稳断裂与断口形态,发现了两个断裂临界速度。当裂纹速度达到第一临界值时,出现二次曲线记号;裂纹扩展速度超过第二临界速度时,断口表面留下二级微裂纹丛。这两个临界速度都是试件厚度的函数。
|
关 键 词: | 失隐 断裂 断口形态 |
文章编号: | 1671-5314(2002)02-0044-04 |
Instability Fracture and Fractography Morphology of PMMA |
| |
Authors: | SHENG Ji-sheng ZHAO Ya-pu |
| |
Institution: | SHENG Ji-sheng 1,ZHAO Ya-pu 2 |
| |
Abstract: | Ultrasonic fractography and scanni ng eletronic microscopy(SEM)are used to study the instability fra cture and fractogra-phy of polymethylmethacrylate(PMM).Two Critical Crack velocities are f ound for the fracture.Conic markings will appear when the crack speed reaches the first critical speed.Crack propagating at sp eed beyond the second critical speed leaves a thicket of small branches penetrating the surface behind them.Both Critical speed s are function of the thickness of the specimens. |
| |
Keywords: | instability fracture fractograp hy morphology |
本文献已被 CNKI 万方数据 等数据库收录! |