You can't be serious.
But just in case you are: what I am saying is there is 309,000 plus pounds of force for every square inch to be sheared in the situation of a one pound charge of C-4 and the 56 sq. inch cross section.
no you are not:
realcddeal said:
Dividing 17.3 x 10e6 inch pounds by 56 sq. inches = 309,540 pounds per inch.
A pound per inch and a pound per square inch are not the same, one could represent a distributed load while the other is in the dimensions of stress. Checking units is just a quick and simple way to check your calculations, yours don't jive.
it seems you are either trying to say that and pound inch is a force, or an inch is an area. Does any of that make sense?
Shaped charges don't fire in all directions.
erm, yes they do. They are designed to concentrate the explosion on the desired point, but any explosive, will expand in all directions, and energy losses due to this is unavoidable.
Why don't you tell us what the efficiency is then since you are trying to pour water on the argument? Do you know? I think you are the one guessing.
last time I checked it was you who was proposing the CD scenario, I apologize for pointing out that you should take realistic factors into consideration in your calculation. The heat of the explosion for TNT is 4000 kJ/kg
If I wanted to pour water on the arguement, I would just cite the papers below, then be done with it.
Autocatalytic thermal decomposition kinetics of TNT
Thermochimica Acta, Volume 388, Issues 1-2, 18 June 2002, Pages 175-181
Gregory T. Long, Brittany A. Brems and Charles A. Wight
Abstract
previous termThermalnext term analysis has been employed to determine the kinetics and the energetics of the slow cook-off chemistry of 2,4,6-trinitrotoluene (previous termTNT)next term by isothermal differential scanning calorimetry (DSC) in high-pressure crucibles sealed under air. Model-free isoconversional analysis of the DSC kinetic traces has been used to determine activation energies (Eα) and the functional form of the reaction model (dependence of reaction rate on the extent of conversion, α). While the variation in Eα with α is in qualitative agreement with the literature it is nevertheless constant within the 95% confidence limits at 140±10 kJ mol−1. Hence, no systematic variation in Eα occurs over the course of the reaction. Rather, the reaction model exhibits a large increase in the range 0.1<α<0.25 and a decrease for 0.25<α<0.43. Thus, the observed acceleratory period is caused by an increase in the reaction model, not by a decrease in activation energy, as might be expected for autocatalysis. This kinetic behavior is ascribed to nucleation and growth of reaction centers in liquid state previous termTNT.next term In addition, a heat of reaction, Q=(4.9±1.5)×102 kJ mol−1 during the previous termthermal decomposition of TNTnext term has been shown to be independent of the heating rate and sample size.
Thermal Decomposition of a Melt-Castable High Explosive: Isoconversional Analysis of TNAZ
Long, G. T.; Wight, C. A.
J. Phys. Chem. B.; (Article); 2002; 106(10); 2791-2795.
Abstract:
The thermal decomposition kinetics of the high explosive 1,3,3-trinitroazetidine (TNAZ) have been measured by nonisothermal differential scanning calorimetry (DSC). Samples of TNAZ in open pans and pierced pans undergo mainly melting (Hfus = 27 ± 3 kJ mol-1) and vaporization (Hvap = 74 ± 10 kJ mol-1) during heating. However, when confined in sealed high-pressure crucibles, exothermic thermal decomposition is observed. The activation energy for thermal decomposition has been determined as a function of the extent of reaction by isoconversional analysis. The initial value of 184 kJ mol-1 at the start of the reaction decreases to 38 kJ mol-1 near the end of the reaction. The rates clearly exhibit acceleratory behavior that is ascribed to autocatalysis. The measured heat release of thermal decomposition (Q = 640 ± 150 kJ mol-1) is independent of the heating rate and the sample mass. These results are consistent with proposed mechanisms of TNAZ decomposition in which the initial step is preferential loss of the nitramine NO2 group over loss of a gem-dinitroalkyl NO2 group.
Thermal Activation of the High Explosive NTO: Sublimation, Decomposition, and Autocatalysis
Long, G. T.; Brems, B. A.; Wight, C. A.
J. Phys. Chem. B.; (Article); 2002; 106(15); 4022-4026.
Abstract:
Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) show that the heating of 5-nitro-2,4-dihydro-3H-1,2,4-triazol-3-one (NTO) leads to competitive sublimation and condensed-phase exothermic decomposition. Model-free isoconversional analysis has determined activation energies (E) for these processes as a function of the extent of conversion, . Sublimation occurs most readily in an open pan; although more than simple sublimation was observed, a global activation energy of E = 130-140 kJ mol-1 for sublimation was determined. Nonisothermal TGA and DSC traces run on pierced pan samples provide convincing evidence for competitive sublimation and condensed-phase decomposition of NTO. Confining NTO samples in a closed pan results in condensed-phase decomposition that leads to the formation of gaseous reaction products and shows autocatalytic behavior during the latter stages. Isoconversional analysis of DSC traces of closed pan samples yield activation energies for exothermic decomposition that increase from E = 273 kJ mol-1 for = 0.01 to a plateau of 333 kJ mol-1 for 0.17 0.35 prior to decreasing to 184 kJ mol-1 for = 0.99. The decrease in E with during the latter stages of decomposition agrees with previous reports of autocatalytic behavior.
Competitive Vaporization and Decomposition of Liquid RDX
Long, G. T.; Vyazovkin, S.; Brems, B. A.; Wight, C. A.
J. Phys. Chem. B.; (Article); 2000; 104(11); 2570-2574.
Abstract:
The thermal decomposition of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) has been studied by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Activation energies as a function of the extent of conversion, , have been determined by model-free isoconversional analysis of these data. In open pans, evaporation is a prevalent process with an activation energy of ~100 kJ mol-1. Confining the system in either a pierced pan or a closed pan promotes liquid state decomposition of RDX that occurs with an activation energy of ~200 kJ mol-1, which suggests scission of an N-N bond as the primary decomposition step. In such a confined environment, gas phase decomposition is a competing channel with an activation energy estimated to be ~140 kJ mol-1. In a closed pan, RDX generates a heat release of ~500 kJ mol-1 that is independent of both the heating rate, , and the mass.
