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Precracking Method Based on Strain Induced Controlling of Ceramics and Fracture Toughness Evaluation
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Yongjin WEI1, 2, Detian WAN1, 2, 3, Kai LI3, Yiwang BAO1, 2, 3, Yuan TIAN1, 2, Yueming LI3
Journal of the Chinese Ceramic Society | 2020, 48(12) : 1914 - 1919
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Journal of the Chinese Ceramic Society | 2020, 48(12): 1914-1919
Precracking Method Based on Strain Induced Controlling of Ceramics and Fracture Toughness Evaluation
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Yongjin WEI1, 2, Detian WAN1, 2, 3, Kai LI3, Yiwang BAO1, 2, 3, Yuan TIAN1, 2, Yueming LI3
Affiliations
  • 1.China Building Materials Academy, State Key Laboratory for Green Building Materials, Beijing 100024, China
  • 2.China Building Material Test and Certification Group Co., Ltd, Beijing 100024, China
  • 3.Jingdezhen Ceramic Institute, Jingdezhen 333403, China

    • WEI Yongjin (1995-), male, Master candidate. E-mail:

About Author:

WEI Yongjin (1995-), male, Master candidate. E-mail:

Published: 2020-12-20 doi: 10.14062/j.issn.0454-5648.20200405
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A simple and feasible precracking method based on the strain government of ceramics to crack propagation was proposed. Three-point bending loading was carried out to prefabricate cracks in Al2O3, SiC and Si3N4 ceramic specimens by bonding the specimens with a triangular notch (crack initiation) on a metal beam to form a ductile-brittle composite beam. The specimens with different crack lengths can be controlled by adjusting the tensile zone height of ceramics. The fracture toughness of these three ceramics was measured by a single edge precracked beam method. The crack propagation process in the ceramic specimens was monitored by acoustic emission technology. The result show that this technology is easy to operate and the success rate of pre-cracking is >80%. The fracture toughness of Al2O3, SiC and Si3N4 measured is 4.45±0.41, 3.45±0.34 MPa·m1/2 and 5.23±0.49 MPa·m1/2, respectively.

ceramic  /  fracture toughness  /  pre-cracking  /  acoustic emission technique  /  single edge pre-cracked beam
魏永金, 万德田, 李恺, 包亦望, 田远, 李月明. 基于应变诱导控制陶瓷预制裂纹的方法及断裂韧性评价. 硅酸盐学报, 2020 , 48 (12) : 1914 -1919 . DOI: 10.14062/j.issn.0454-5648.20200405
Yongjin WEI, Detian WAN, Kai LI, Yiwang BAO, Yuan TIAN, Yueming LI. Precracking Method Based on Strain Induced Controlling of Ceramics and Fracture Toughness Evaluation[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (12) : 1914 -1919 . DOI: 10.14062/j.issn.0454-5648.20200405
Appendix
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Year 2020 volume 48 Issue 12
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Article Info
doi: 10.14062/j.issn.0454-5648.20200405
  • Receive Date：2020-06-09
  • Online Date：2026-10-30
  • Published：2020-12-20
Article Data
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History
  • Received：2020-06-09
  • Revised：2020-07-07
Funding
Affiliations
    1.China Building Materials Academy, State Key Laboratory for Green Building Materials, Beijing 100024, China
    2.China Building Material Test and Certification Group Co., Ltd, Beijing 100024, China
    3.Jingdezhen Ceramic Institute, Jingdezhen 333403, China

Corresponding:

WAN Detian (1978-), male, Ph.D., Professor. E-mail:
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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