Response of an Impact Test Apparatus for Fall Protective Headgear Testing Using a Hybrid-III Head/Neck Assembly

Experimental Techniques ◽

10.1007/s40799-016-0046-4 ◽

2016 ◽

Vol 40 (1) ◽

pp. 413-427 ◽

Cited By ~ 4

Author(s):

V. Caccese ◽

J. Ferguson ◽

J. Lloyd ◽

M. Edgecomb ◽

M. Seidi ◽

...

Keyword(s):

Impact Test ◽

Test Apparatus ◽

Hybrid Iii ◽

Head Neck

Download Full-text

Specification for spring-operated impact-test apparatus and its calibration

10.3403/00184950 ◽

1988 ◽

Keyword(s):

Impact Test ◽

Test Apparatus

Download Full-text

The Influence of Hard Hat Design Features on Head Acceleration Attenuation

Journal of Applied Biomechanics ◽

10.1123/jab.2020-0182 ◽

2020 ◽

pp. 1-7

Author(s):

Arthur Alves Dos Santos ◽

James Sorce ◽

Alexandra Schonning ◽

Grant Bevill

Keyword(s):

Lead Shot ◽

Construction Site ◽

Head Acceleration ◽

Protective Capacity ◽

Design Features ◽

Shell Design ◽

Hybrid Iii ◽

Hard Hat ◽

Head Neck

This study evaluated the performance of 6 commercially available hard hat designs—differentiated by shell design, number of suspension points, and suspension tightening system—in regard to their ability to attenuate accelerations during vertical impacts to the head. Tests were conducted with impactor materials of steel, wood, and lead shot (resembling commonly seen materials in a construction site), weighing 1.8 and 3.6 kg and dropped from 1.83 m onto a Hybrid III head/neck assembly. All hard hats appreciably reduced head acceleration to the unprotected condition. However, neither the addition of extra suspension points nor variations in suspension tightening mechanism appreciably influenced performance. Therefore, these results indicate that additional features available in current hard hat designs do not improve protective capacity as related to head acceleration metrics.

Download Full-text

Impact test procedures for road vehicles. Rear seat positioning procedures for Hybrid III 5th percentile female dummy

10.3403/30330530u ◽

2016 ◽

Keyword(s):

Impact Test ◽

Rear Seat ◽

Road Vehicles ◽

Test Procedures ◽

Hybrid Iii

Download Full-text

Effects of Moisture Content and Impact Energy on the Cracking Characteristics of Walnuts

International Journal of Food Engineering ◽

10.1515/ijfe-2012-0168 ◽

2014 ◽

Vol 10 (1) ◽

pp. 149-156 ◽

Cited By ~ 2

Author(s):

Feizollah Shahbazi

Keyword(s):

Moisture Content ◽

Impact Energy ◽

Impact Test ◽

Interaction Effects ◽

Optimum Moisture Content ◽

Test Apparatus ◽

Cracking Characteristics ◽

Impact Energies ◽

Different Levels ◽

Kernel Yield

Abstract A study was conducted to determine the effects of moisture content and energy of impact on the cracking characteristics of walnuts. A sample of fresh harvested walnuts was divided into four portions and conditioned under sunshine for different time durations to obtain different levels of moisture content [9.2–29.7%, wet basis (w.b.)]. An impact test apparatus was used to apply different impact energies in the range of 0.13–1.11 J to samples with different moisture content. Data obtained on the quantity of fully cracked and unbroken kernel, fully cracked but broken kernel and uncracked nuts were used in the computation of the nuts cracking characteristics. Results showed that moisture content, impact energy and interaction effects of these two variables have significant effect on the walnuts cracking characteristics. Full cracking of nuts increased with impact energy and decreasing moisture content. The optimum moisture content for cracking walnuts that gave the best result combination of high whole kernel yield and low kernel breakage was found to be about 16%. The optimum impact energy for cracking was found to be about 1.01 J (1.01 ± 0.1 J). The results of this study show that development of a centrifugal impact cracker, which uses impact to crack walnuts, is possible. In the designing of the walnut cracker, the radius and speed of the cracker should be such that create impact energy and velocity of about 1.01 J and 11 m/s, respectively, and walnuts should be conditioned to the moisture content of about 16% for optimum efficiency.

Download Full-text