Issue 50

A. Kakaliagos et alii, Frattura ed Integrità Strutturale, 50 (2019) 481-496; DOI: 10.3221/IGF-ESIS.50.40

௣ ൌ ቀ √ଷ ଷ ௬ ቁ ൈ ቂቀ1 െ ௥ ೛మ ௔ మ ቁ ൅ 2 ௥ ೛ ௕ ቃ ௣ ൌ ቀ √ଷ ଷ ௬ ቁ ൈ ௥ ೛ ா ቀ ௥ ೛ ௔ ቁ ଶ ቈ0.4 ൅ 1.3 ൬ ௔ ௥ ೛ ൰ ଶ ቉ ൌ ቀ √ଷ ଷ ௬ ቁ ൈ ௥ ா ቀ ௥ ೛ ௔ ቁ ଶ ൤0.4 ൅ 1.3 ቀ ௔ ௥ ቁ ଶ ൨ ଵ ൌ ቀ √ଷ ଷ ௬ ቁ ൈ ൤ቀ ௥ ೛మ ௔ మ ൅ 1ቁ ൅ 2 ௥ ௥ ೛ ൨ ଶ ൌ ቀ √ଷ ଷ ௬ ቁ ൈ ൤ቀ ௥ ೛మ ௔ మ െ 1ቁ ൅ 2 ௥ ௥ ೛ ൨ ଷ ൌ ቀ √ଷ ଷ ௬ ቁ ൈ ൤ ௥ ೛మ ௔ మ ൅ 2 ௥ ௥ ೛ ൨ ൌ ௥ ೛ ௕ ௣

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Figure 6: Plastic zone in gunpowder chamber.

Figure 7: Push over curve - Gunpowder chamber elastoplastic response under internal pressure.

Temperature effects in powder chamber During firing of Orban’s Bombard a significant temperature could develop inside the gun due to gunpowder ignition. Depending on the powder burning characteristics, the temperature inside the gun could be expected to rise significantly

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