Table of Contents
What is JWL equation of state?
The JWL equation of state (EOS) is frequently used for the products (and sometimes reactants) of a high explosive (HE). Here we review and systematically derive important properties. The JWL EOS is of the Mie-Grueneisen form with a constant Grueneisen coefficient and a constants specific heat.
What is the critical diameter of an explosive?
The measured critical diameters for some common explosives are as follows: 1–1.5 mm for PETN [12], 0.5 mm [11] and 1–1.5 mm for RDX [12], 100 mm for AN [12], and 5 mm for emulsion [16]. For commercial explosives such as emulsion and ANFO, we may see that Fig.
What is explosive diameter?
The critical diameter or failure diameter is the minimum diameter of a cylindrical charge of high explosive which sustains a high order steady-state detonation.
What does JWL mean on a rim?
Japan Light Alloy Wheel standard
JWL standard (Japan Light Alloy Wheel standard), a set of requirements for alloy wheels set by the Ministry of Land, Infrastructure, Transport and Tourism (Japan) that must be met for all passenger cars in Japan.
What is charge factor in blasting?
The charge factor can be defined as the amount of explosive required for the breakage of one cubic meter volume of the rock mass. The optimum charge factor results in the proper breakage of rock-strata with minimum nuisance and maximum productivity.
What is powder factor formula?
Calculating Powder Factors Or, alternatively, it can be the amount of explosives required to break a unit measure of rock. Since rock is usually measured in pounds, there are several possible combinations that can express the powder factor. Powder Factor = Tons of rock (or cubic yards) per pounds of explosive.
What does JW mean on wheels?
Japanese wheels must have a “JWL” logo stamped on the wheel. “JWL”, Japan Light Wheel Alloy logo. “JWL” (Japan Light Wheel Alloy) is a compilation of standards defined by the Japanese Government to ensure the vehicle’s safety for aluminum road wheels.
What does via mean on wheels?
Japanese Vehicle Inspection Association
This is why the VIA (Japanese Vehicle Inspection Association) was formed. The VIA is an impartial third party that tests wheels to the JWL standard and maintains a searchable database of the wheels that have passed its review. Getting VIA-registered is voluntary and costs money.
What is the K factor for hazardous fragmentation?
DDESB/Department of Defense Explosives Safety Board model uses fragment form factor k with values from 2609 kg/m3 (forged projectiles) to 4740 kg/m3 (steel spheres).
What is powder factor in explosive?
The POWDER FACTOR is a relationship between how much rock is broken and how much explosive is used to break it. It can serve a variety of purposes, such as an indicator of how hard the rock is, or the cost of the explosives needed, or even as a guide to planning a shot.
What does JWL mean on rims?
What does via mean on rims?