scholarly journals Experimental and numerical investigations into collapse behaviour of thin spherical shells under drop hammer impact

2007 ◽  
Vol 44 (10) ◽  
pp. 3136-3155 ◽  
Author(s):  
N.K. Gupta ◽  
N. Mohamed Sheriff ◽  
R. Velmurugan
Keyword(s):  
Spherical Shells ◽  
Drop Hammer ◽  
Numerical Investigations ◽  
Hammer Impact

Ultrasonic Test Analysis of Impact Damage of Polypropylene Fiber Mortar

2012 ◽  
Vol 271-272 ◽  
pp. 324-328
Author(s):  
Xiao Hong Chen ◽  
Wei Hong Xuan ◽  
Yu Zhi Chen
Keyword(s):  
Ultrasonic Velocity ◽  
Impact Damage ◽  
Polypropylene Fiber ◽  
Ultrasonic Test ◽  
Test Analysis ◽  
Drop Hammer ◽  
Damage Degree ◽  
Hammer Impact ◽  
The Right ◽  
The Impact

The method recommended by ACI Committee 544 was used in this paper. Drop hammer impact tests based on mortar specimens with different contents of polypropylene fiber were carried out. The Ultrasonic test is done before and after impacting. Under different drop hammer impact times, polypropylene fiber mortar specimens' damage degree was evaluate based on ultrasonic velocity. The results show that the hammering number corresponding to the impact fracture of polypropylene fiber mortar is more than ordinary mortar. The ultrasonic velocity of all specimens decreased gradually during the process of hammering, but adding the right amount of polypropylene fibers can effectively slow down the rate of wave speed decline.

scholarly journals Research on the Drop Hammer Impact Test System

2021 ◽  
Vol 692 (4) ◽  
pp. 042117
Author(s):  
Zhiming Wang ◽  
Dongdong Liu ◽  
Zhongsheng Li
Keyword(s):  
Impact Test ◽  
Test System ◽  
Drop Hammer ◽  
Hammer Impact

scholarly journals Drop-hammer impact sensitivity and damage effect of two PTFE-matrix reactive materials

AIP Advances ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 095104
Author(s):  
Jun Zhang ◽  
Qiang Liu ◽  
Huaixi Wang ◽  
Yuchun Li ◽  
Junyi Huang ◽  
...  
Keyword(s):  
Impact Sensitivity ◽  
Damage Effect ◽  
Drop Hammer ◽  
Reactive Materials ◽  
Hammer Impact

Research on Impact Damage of Polypropylene Fiber Mortar Based on Axial Compressive Strength

2011 ◽  
Vol 335-336 ◽  
pp. 1181-1185
Author(s):  
Yu Zhi Chen ◽  
Wei Hong Xuan ◽  
Xiao Hong Chen
Keyword(s):  
Compressive Strength ◽  
Impact Damage ◽  
Polypropylene Fiber ◽  
Drop Hammer ◽  
Damage Degree ◽  
Before And After ◽  
Axial Compressive Strength ◽  
Hammer Impact ◽  
The Right ◽  
The Impact

The method recommended by ACI Committee 544 was used in this paper. Drop hammer impact tests based on mortar specimens with different contents of polypropylene fiber were carried out. The compressive strength test is done before and after impacting. Under different drop hammer impact time, polypropylene fiber mortar specimens’ damage degree was evaluate based on compressive strength. The results show that the hammering number corresponding to the impact fracture of polypropylene fiber mortar is more than ordinary mortar that without fiber. The axial compressive strength of all specimens decreased gradually during the process of hammering, but adding the right amount of polypropylene fibers can effectively slow down the rate of strength reduction.

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