Evaluation of impact strength and reliability of ceramic bearing ball for next-generation airplanes

下一代飞机陶瓷轴承球的冲击强度和可靠性评估

• 批准号: 21560096
• 负责人: TAKAHASHI Manabu
• 金额: $ 2.66万
• 依托单位: Ehime University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21560096/
• 关键词: 破壊; 衝撃; 接触; セラミック; リングクラック

The equipments of pendulum impact test and weight-drop test were manufactured in order to evaluate the ring crack strength under impact load. In the pendulum impact test, a slanting collision is caused because alignment adjustment of balls center is difficult. The measurement is very difficult although collision load of ring crack initiation is theoretically computable. On the other hand, in weight-drop test, collision load of ring crack initiation is correctly measurable using a load cell. Equipment manufacture is also comparatively easy. The ring crack is attributed to binder destruction of the glassy phase between particles, impurities, etc. It is possible to investigate microscopic fracture from ring crack strength. In the collision contact, the strength of the ceramic ball rises and the scatter of them become small, because the crack length which participates in ring crack initiation is small compared with static contact.

为了评估环在冲击载荷下的裂纹强度，研制了摆锤冲击试验和坠锤试验装置。在摆锤冲击试验中，由于球心对中调整困难，造成了倾斜碰撞。虽然理论上可以计算出环裂纹起裂的碰撞载荷，但测量难度很大。另一方面，在失重试验中，用测压元件可以准确测量环裂纹起裂的碰撞载荷。设备制造也相对容易。环形裂纹是由于颗粒、杂质等之间的玻璃相被粘结剂破坏所致。从环裂强度分析微观断裂是可能的。在碰撞接触中，由于参与环形裂纹萌生的裂纹长度比静态接触小，陶瓷球的强度上升，散射变小。

项目成果

振り子式衝撃試験装置の開発とその妥当性(JST 科研費 基盤研究(c)H21-23)

摆锤冲击试验装置的开发及其有效性（JST科学研究补助金（c）H21-23）

振り子式衝撃試験装置の開発とその妥当性(JST科研費基盤研究(c)H21-23)

摆锤冲击试验装置的开发及其有效性（JST科学研究基础研究（c）H21-23）