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A Modified Test Method and Formula for Tensile Fracture Toughness of Putty
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Lin ZHU1, 2, Ziyuan LIU1, 2, Teng WANG3
Chinese Quarterly of Mechanics | 2025, 46(3) : 802 - 810
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Chinese Quarterly of Mechanics | 2025, 46(3): 802-810
A Modified Test Method and Formula for Tensile Fracture Toughness of Putty
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Lin ZHU1, 2, Ziyuan LIU1, 2, Teng WANG3
Affiliations
  • 1.Department of Civil Engineering, Hebei University of Water Resources and Electric Engineering, Cangzhou 061001, Hebei, China
  • 2.Key Laboratory of Geotechnical Engineering Safety and Deformation Control (Hebei University of Water Resources and Electric Engineering), Cangzhou 061001, Hebei, China
  • 3.School of Civil Engineering, Beijing Jiaotong University, Beijing 10010, China
Published: 2025-09-25 doi: 10.15959/j.cnki.0254-0053.2025.03.020
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Due to the low strength of putty, it is impossible to directly measure its fracture toughness using the standard tensile fracture test. In order to accurately measure the tensile fracture toughness of low-strength materials such as putty, this study presents an improved compact tension test method and derives a tensile fracture toughness formula through numerical analysis. The formula is further refined by accounting for boundary effects, and its accuracy is validated through systematic testing with varying initial crack lengths. The results demonstrate that, the modified formula enables direct calculation of material fracture toughness. The stress intensity factor depends on relative boundary conditions rather than absolute boundary effects, with boundary effects becoming more pronounced with increasing initial crack length. The specimens exhibit pure Mode I fracture, with the modified formula yielding a stable fracture toughness of approximately 42 kN/m3/2. Experimental validation confirms the accuracy of both the improved test method and the modified formula, establishing their applicability for measuring fracture toughness in low-strength materials like putty and contributing to putty material development.

putty  /  tension fracture  /  non-stationary  /  stress intensity factor  /  tensile fracture test
Lin ZHU, Ziyuan LIU, Teng WANG. A Modified Test Method and Formula for Tensile Fracture Toughness of Putty[J]. Chinese Quarterly of Mechanics, 2025 , 46 (3) : 802 -810 . DOI: 10.15959/j.cnki.0254-0053.2025.03.020
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Year 2025 volume 46 Issue 3
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Article Info
doi: 10.15959/j.cnki.0254-0053.2025.03.020
  • Receive Date：2025-02-03
  • Online Date：2026-03-24
  • Published：2025-09-25
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History
  • Received：2025-02-03
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Affiliations
    1.Department of Civil Engineering, Hebei University of Water Resources and Electric Engineering, Cangzhou 061001, Hebei, China
    2.Key Laboratory of Geotechnical Engineering Safety and Deformation Control (Hebei University of Water Resources and Electric Engineering), Cangzhou 061001, Hebei, China
    3.School of Civil Engineering, Beijing Jiaotong University, Beijing 10010, China
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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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