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

1988 ◽  
Keyword(s):  
Impact Test ◽  
Test Apparatus

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

2014 ◽  
Vol 10 (1) ◽  
pp. 149-156 ◽  
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.

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

2016 ◽  
Vol 40 (1) ◽  
pp. 413-427 ◽  
Author(s):  
V. Caccese ◽  
J. Ferguson ◽  
J. Lloyd ◽  
M. Edgecomb ◽  
M. Seidi ◽  
...  
Keyword(s):  
Impact Test ◽  
Test Apparatus ◽  
Hybrid Iii ◽  
Head Neck

An elastodynamic interpretation of impact test apparatus for soils

Géotechnique ◽  
1995 ◽  
Vol 45 (4) ◽  
pp. 691-700 ◽  
Author(s):  
T. G. Davies ◽  
U. F. Karim
Keyword(s):  
Impact Test ◽  
Test Apparatus

Design Guideline for Ball Impact Test Apparatus

2006 ◽  
Vol 129 (1) ◽  
pp. 98-104 ◽  
Author(s):  
Chang-Lin Yeh ◽  
Yi-Shao Lai
Keyword(s):  
Impact Test ◽  
Test Apparatus ◽  
Design Guideline ◽  
Ball Impact ◽  
Test Methodology ◽  
Force Profile ◽  
Reliability Of Solder Joints ◽  
Board Level ◽  
Board Level Reliability ◽  
Test Process

The ball impact test is developed as a package-level measure of the board-level reliability of solder joints in the sense that it leads to brittle intermetallic fracturing, similar to that from a board-level drop test. Following classical structural dynamics principles, the ball impact test process is analyzed to provide insights into transient characteristics of this particular test methodology. A design guideline for the ball impact test apparatus based on characteristics of the measured impact force profile is proposed.

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

2014 ◽  
pp. n/a-n/a ◽  
Author(s):  
V. Caccese ◽  
J. Ferguson ◽  
J. Lloyd ◽  
M. Edgecomb ◽  
M. Seidi ◽  
...  
Keyword(s):  
Impact Test ◽  
Test Apparatus ◽  
Hybrid Iii ◽  
Head Neck

A tensile impact test apparatus for composite materials

1989 ◽  
Vol 29 (4) ◽  
pp. 466-473 ◽  
Author(s):  
D. F. Adams ◽  
L. G. Adams
Keyword(s):  
Composite Materials ◽  
Impact Test ◽  
Test Apparatus ◽  
Tensile Impact

Multibody modelling of a side impact test apparatus

1999 ◽  
Vol 4 (1) ◽  
pp. 17-30 ◽  
Author(s):  
R.A. Moms ◽  
J.R. Crandall ◽  
W.D. Pilkey
Keyword(s):  
Impact Test ◽  
Side Impact ◽  
Test Apparatus

Mach one impact test apparatus utilizing an 18.4‐mm‐bore gas gun with a novel decelerating device

1979 ◽  
Vol 50 (7) ◽  
pp. 824-828 ◽  
Author(s):  
A. P. Coppa ◽  
G. F. Selden ◽  
R. L. Mehan
Keyword(s):  
Impact Test ◽  
Test Apparatus ◽  
Gas Gun
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