Comparison of three different adhesive joints using static and dynamic impact tests: development of a new drop weight impact test rig incorporating a modified Arcan fixture

With the increasing use of carbon fiber reinforced plastics in various fields, carbon fiber composites based on prepregs have attracted attention in industries and academia research. However, prepreg manufacturing processes are costly, and the strength of structures varies depending on the orientation and defects (pores and delamination). For the non-contact evaluation of internal defects, the lock-in infrared thermography was proposed to investigate the defects in the composites subjected to the compression after impact test (CAI). The drop-weight impact test was conducted to study the impact behavior of the composites according to fibers orientation for composite fabricated using unidirectional (UD) carbon fiber prepregs. Using CAI tests, the residual compressive strengths were determined, and the damage modes were detected using a thermal camera. The results of the drop weight impact tests showed that the specimen laminated at 0° suffered the largest damage because of susceptibility of the resin to impact. The specimens with 0°/90° and +45°/−45° fibers orientation exhibited more than 90% of the impact energy absorption and good impact resistance. Furthermore, the specimens that underwent the impact tests were subjected to compressive test simultaneously with the lock-in thermography defects detection. The results showed that internal delamination, fibers splitting, and broken fibers occurred. The temperature differences in the residual compression tests were not significant.

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Design on Falling Weight Impact Test Rig

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.148-149.388 ◽

2011 ◽

Vol 148-149 ◽

pp. 388-392

Author(s):

Jie Du ◽

Chun Ting Ma

Keyword(s):

Impact Test ◽

Particle Diameter ◽

Test System ◽

Computer Hardware ◽

Sensor Data ◽

Test Rig ◽

High Shock ◽

Data Acquisition Card ◽

Weight Impact ◽

Falling Weight

Based on Interaction energy of solid ball, the new particle damper is designed which can be used in a high temperature and high shock energy. To verify the design of the damper, a falling weight Impact test rig is designed, a sensor, data acquisition card and computer hardware constitutes a signal test system. Experimental results show that the particle diameter is the biggest impact for the role of the particle damper , the characteristics of the displacement curves are increased at first and then decreased, the opposite effect of the time. At the same time filled with particles and the degree of damping rod embedment also have an impact on energy consumption.

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Evaluation of impact resistance properties of polyurethane-based polymer concrete for the repair of runway subjected to repeated drop-weight impact test

Construction and Building Materials ◽

10.1016/j.conbuildmat.2021.125152 ◽

2021 ◽

Vol 309 ◽

pp. 125152

Author(s):

Sadi Ibrahim Haruna ◽

Han Zhu ◽

Wenlixia Jiang ◽

Jianwen Shao

Keyword(s):

Impact Test ◽

Impact Resistance ◽

Polymer Concrete ◽

Drop Weight ◽

Weight Impact

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Sensitivity and Phase Transition of Heatedϵ-CL-20 in Drop-Weight Impact Test

Propellants Explosives Pyrotechnics ◽

10.1002/prep.201800173 ◽

2018 ◽

Vol 43 (11) ◽

pp. 1164-1170 ◽

Cited By ~ 4

Author(s):

Xue Zheng ◽

Shaojun Yu ◽

Wen Wen ◽

Yushi Wen ◽

Pei Wang ◽

...

Keyword(s):

Phase Transition ◽

Impact Test ◽

Drop Weight ◽

Weight Impact

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The effect of microwave pretreatment on impact crushing of lead-zinc ore

Metallurgical Research & Technology ◽

10.1051/metal/2021055 ◽

2021 ◽

Vol 118 (5) ◽

pp. 501

Author(s):

Yulong Liu ◽

Dexin Ding ◽

Wenguang Chen ◽

Nan Hu ◽

Lingling Wu ◽

...

Keyword(s):

Energy Input ◽

Impact Test ◽

Characteristic Parameters ◽

Microwave Pretreatment ◽

Drop Weight ◽

Lead Zinc ◽

Weight Impact ◽

Impact Crushing ◽

The Impact ◽

The Relationship

The relationship between energy input and particle size of ore samples after crushing and effect of microwave pretreatment on impact crushing of lead-zinc ore were studied by drop weight impact test. The results showed that the lead-zinc ore became softer and had higher degree of crushing after microwave pretreatment. Compared with continuous microwave pretreatment, pulsed microwave pretreatment could improve the drop weight impact crushing efficiency of lead-zinc ore. When the specific comminution energy were 5 kW h/t, 10 kW h/t respectively, the crushing characteristic parameters t10 were 60.42% and 67.46% respectively by continuous microwave. But the values of t10 were increased to 68.64% and 75.88% respectively after pulsed microwave radiation under same microwave power and time. In addition, water quenching could more promote the impact crushing efficiency of lead-zinc ore after microwave irradiation.

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Factors influencing impact force profile and measurement accuracy in drop weight impact tests

International Journal of Impact Engineering ◽

10.1016/j.ijimpeng.2020.103688 ◽

2020 ◽

Vol 145 ◽

pp. 103688 ◽

Cited By ~ 2

Author(s):

Huawei Li ◽

Wensu Chen ◽

Hong Hao

Keyword(s):

Measurement Accuracy ◽

Impact Force ◽

Impact Tests ◽

Factors Influencing ◽

Drop Weight ◽

Force Profile ◽

Weight Impact

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Experimental Investigation on the Impact Resistance of Carbon Fibers Reinforced Coral Concrete

Materials ◽

10.3390/ma12234000 ◽

2019 ◽

Vol 12 (23) ◽

pp. 4000 ◽

Cited By ~ 2

Author(s):

Bing Liu ◽

Jingkai Zhou ◽

Xiaoyan Wen ◽

Jianhua Guo ◽

Xuanyu Zhang ◽

...

Keyword(s):

Weibull Distribution ◽

Carbon Fibers ◽

Impact Test ◽

Concrete Strength ◽

Impact Resistance ◽

Initial Crack ◽

Drop Weight ◽

Weight Impact ◽

The Impact ◽

Two Parameter

In this study, the impact resistance of coral concrete with different carbon fiber (CF) dosages subjected to drop-weight impact test was investigated. For this purpose, three concrete strength grades (C20, C30, C40) and six CF dosages (0.0%, 0.3%, 0.6%, 1.0%, 1.5%, and 2.0% by weight of the binder) were considered, and a total of 18 groups of carbon fibers reinforced coral concrete (CFRCC) were cast. For each group, eight specimens were tested following the drop-weight impact test suggested by CECS 13. Then, the two-parameter Weibull distribution theory was adopted to statistically analyze the variations in experimental results. The results indicated that the addition of CFs could transform the failure pattern from obvious brittleness to relatively good ductility and improve the impact resistance of coral concrete. Moreover, the impact resistance of CFRCC increases with the CF dosage increasing. The statistical analysis showed that the probability distribution of the blow numbers at the initial crack and final failure of CFRCC approximately follows the two-parameter Weibull distribution.

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