| 薄钢片动态撕裂中断裂韧性的评定 |
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| 引用本文： | M.ABERKANE A．UIBRAHIM.薄钢片动态撕裂中断裂韧性的评定[J].宁波大学学报(理工版),2003,16(4):342-348. |
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| 作者姓名： | M.ABERKANE A．UIBRAHIM |
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| 作者单位： | [1]DepartementdeGenieMecanique,FaculteduCeniedelaConstruction,UniversiteMouloudMammerideTizi-Ouzou,BP17RP,Tizi-Ouzou15000,Algeria [2]Laboratoired‘EnergetiqueMecaniqueetMateriaux,UniversitedeBoumerdes35000,Algeria; |
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| 摘 要： | 提出了一个关于薄钢片动态撕裂试验能量分析法．在摆锤冲击试验机上按原始的实验方法获得了起始动态断裂韧性R0,dyn,和动态撕裂模量Tdym，为了比较对同样材料进行了静态撕裂试验，以研究加载率V对断裂基本功ГC的影响．结果表明，在加载率1mm／min到300mm／min的变化范围内，断裂基本功Гc随加载率的对数略有下降．由于屈服应力随加载率而增加，作R0,dyn和Tdyn的比较时，观察到动态断裂韧性较之静态结果有一个明显的下降．
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| 关 键 词： | 薄钢片 动态撕裂 韧性撕裂 裤形撕裂试验 断裂功 摆锤冲击试验机 断裂韧性 |
Fracture Toughness Evaluation in Dynamic Tearing of Thin Sheet Steel |
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| M.ABERKANE,A.OUIBRAHIM.Fracture Toughness Evaluation in Dynamic Tearing of Thin Sheet Steel[J].Journal of Ningbo University(Natural Science and Engineering Edition),2003,16(4):342-348. |
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| Authors: | MABERKANE AOUIBRAHIM |
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| Abstract: | This paper presents an energy analysis during dynamic tearing tests of thin steel sheet. These experiments are performed on a Charpy test device using an original experimental method. Dynamic fracture toughness at initiation R0,dyn and dynamic tearing modulus Tdyn are obtained. For a comparison purpose, static trousers tearing tests are conducted, on the same material, in order to study the influence loading rate V on the essential work of fracture Гe (calculated from Mai and Cotterell (1984) analysis). We have shown that by varying the loading rate from 1 mm/min to 300 mm/min, the essential work of fracture Гe decreases slowly with the Loga rithm of the loading rate V. A significant drop of dynamic fracture toughness compared to static one is observed,while making a comparison between R0,dyn and Гe (1 mm/rmin) due to the increase of yield stress with loading rate. |
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| Keywords: | ductile tearing trousers test work of fracture Charpy test device petalling |
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