Mata-Diaz et al 2018a - Revision history

Materiales.Compuestos at 12:02, 12 October 2022

2022-10-12T12:02:12Z

Materiales.Compuestos at 11:57, 12 October 2022

2022-10-12T11:57:30Z

Scipediacontent at 06:29, 3 May 2022

2022-05-03T06:29:20Z

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Scipediacontent: Scipediacontent moved page Draft Content 193510100 to Mata-Diaz et al 2018a

2022-03-31T15:44:49Z

Scipediacontent moved page Draft Content 193510100 to Mata-Diaz et al 2018a

Scipediacontent: Created page with "== Abstract == The aeronautical industry tries continuously to find different strategies to optimize structural components with the aim of reducing their weight and hence ach..."

2022-03-31T15:44:46Z

Created page with "== Abstract == The aeronautical industry tries continuously to find different strategies to optimize structural components with the aim of reducing their weight and hence ach..."

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== Abstract ==

The aeronautical industry tries continuously to find different strategies to optimize structural components with the aim of reducing their weight and hence achieving a more sustainable transport. The new developments that will come in the following years, will probably use incorporate open rotor engines since they have lower consume. These engines have a series of counter-rotating blades made of composite materials, which could impact the aircraft fuselage in case of failure. Impacts on aeronautic structures can be caused by rigid (metallic fragments), or by highly deformable bodies (hail, bird). Apart from these, which have already been studied, there are other types of impacts, practically unexplored, which are the fragments of carbon/epoxy laminates.
In this work, high speed impact tests of carbon/epoxy fragments have been carried out in a wide range of impact velocities, from 80 to 190 m/s. These tests have been monitored using high-speed cameras which, using a specific tracking software, could calculate their acceleration and therefore the force exerted. The erosion suffered during impact has also been quantified. In order to study the failure process, a simple analytical model has been proposed to evaluate the influence of the different mechanisms of energy absorption during the impact and hence predict the erosion of the fragment during the impact.

== Full document ==
<pdf>Media:Draft_Content_193510100native-articles-120.pdf</pdf>

@@ Line 131: / Line 131: @@
 |  style="border-top: 2pt solid black;border-bottom: 1pt solid black;text-align: right;vertical-align: top;"|<span style="text-align: center; font-size: 75%;">Valor</span>
 |-
-|  style="border-top: 1pt solid black;text-align: right;"|<math>{\sigma }_{a}</math>
+|  style="border-top: 1pt solid black;text-align: center;"|<math>{\sigma }_{a}</math>
-|  style="border-top: 1pt solid black;text-align: right;"|<math>\sim {10}^{8}\, Pa</math>
+|  style="border-top: 1pt solid black;text-align: center;"|<math>\sim {10}^{8}\, Pa</math>
 |-
-|  style="text-align: right;"|<math>{\, A}_{r}</math>
+|  style="text-align: center;"|<math>{\, A}_{r}</math>
-|  style="text-align: right;"|<math display="inline">\sim {10}^{-4}\, {m}^{2}</math>
+|  style="text-align: center;"|<math display="inline">\sim {10}^{-4}\, {m}^{2}</math>
 |-
-|  style="text-align: right;"|<math>{m}_{i}</math>
+|  style="text-align: center;"|<math>{m}_{i}</math>
-|  style="text-align: right;"|<math>\sim {10}^{-2}\, kg</math>
+|  style="text-align: center;"|<math>\sim {10}^{-2}\, kg</math>
 |-
 | <math>{v}_{i}</math>
-|  style="text-align: right;"|<math>\sim {10}^{2}\, m/s</math>
+|  style="text-align: center;"|<math>\sim {10}^{2}\, m/s</math>
 |-
 | <math>{y}_{a}</math>
-|  style="text-align: right;"|<math>\sim {10}^{-4}\, {m}^{2}</math>
+|  style="text-align: center;"|<math>\sim {10}^{-4}\, {m}^{2}</math>
 |-
 | <math>{E}_{eq}</math>
-|  style="text-align: right;"|<math>\sim {10}^{-4}\, {m}^{2}</math>
+|  style="text-align: center;"|<math>\sim {10}^{-4}\, {m}^{2}</math>
 |-
 | <math>{\epsilon }_{eq}</math>
-|  style="text-align: right;"|<math display="inline">\sim {10}^{-4}\, {m}^{2}</math>
+|  style="text-align: center;"|<math display="inline">\sim {10}^{-4}\, {m}^{2}</math>
 |-
 | <math>w</math>
-|  style="text-align: right;"|<math>\sim {10}^{-4}\, {m}^{2}</math>
+|  style="text-align:center;"|<math>\sim {10}^{-4}\, {m}^{2}</math>
 |-
 | <math>L</math>
-|  style="text-align: right;"|<math>\sim {10}^{-4}\, {m}^{2}</math>
+|  style="text-align: center;"|<math>\sim {10}^{-4}\, {m}^{2}</math>
 |-
 | <math>{G}_{Ic}</math>
-|  style="text-align: right;"|<math>\sim {10}^{-4}\, {m}^{2}</math>
+|  style="text-align: center;"|<math>\sim {10}^{-4}\, {m}^{2}</math>
 |-
 | <math>{y}_{d}</math>
-|  style="text-align: right;"|<math>\sim {10}^{-4}\, {m}^{2}</math>
+|  style="text-align: center;"|<math>\sim {10}^{-4}\, {m}^{2}</math>
 |-
-|  style="text-align: right;"|<math display="inline">n</math>
+|  style="text-align: center;"|<math display="inline">n</math>
-|  style="text-align: right;"|<math display="inline">\sim {10}^{-4}\, {m}^{2}</math>
+|  style="text-align: center;"|<math display="inline">\sim {10}^{-4}\, {m}^{2}</math>
 |-
-|  style="border-bottom: 2pt solid black;text-align: right;"|<math display="inline">h</math>
+|  style="border-bottom: 2pt solid black;text-align: center;"|<math display="inline">h</math>
-|  style="border-bottom: 2pt solid black;text-align: right;"|<math>\sim {10}^{-4}\, {m}^{2}</math>
+|  style="border-bottom: 2pt solid black;text-align: center;"|<math>\sim {10}^{-4}\, {m}^{2}</math>
 |}

@@ Line 1: / Line 1: @@
 ==1 Introducción ==
@@ Line 95: / Line 29: @@
 <div class="center" style="width: auto; margin-left: auto; margin-right: auto;">
-<span style="text-align: center; font-size: 75%;">'''Figura 2.''' Secuencia de imágenes correspondientes a un impato de un fragmento producido a una velocidad aproximada de 100 m/s</span></div>
+<span style="text-align: center; font-size: 75%;">'''Figura 2.''' Secuencia de imágenes correspondientes a un impato de un fragmento producido a una velocidad aproximada de 100 m/s.</span></div>
 Después de la realización de los ensayos, las imágenes obtenidas de las cámaras de alta velocidad se emplearon para analizar el proceso de impacto, y de esta manera identificar los procesos de daño más relevantes a medida que el fragmento impacta contra la placa rígida. En la figura 2 se puede ver una secuencia de un impacto de un fragmento a una velocidad aproximada de 100 m/s. Se puede identificar un patrón en forma de damero colocado en la parte trasera del fragmento para realizar el seguimiento.
@@ Line 192: / Line 126: @@
 {| style="width: 100%;border-collapse: collapse;"
 |-
-|  colspan='2'  style="border-bottom: 2pt solid black;text-align: center;"|<span style="text-align: center; font-size: 75%;">'''Tabla 1.''' Valores característicos de las variables que intervienen en los diferentes mecanismos de absorción de energía.</span>
+|  colspan='2'  style="border-bottom: 2pt solid black;text-align: center;"|<span style="text-align: center; font-size: 75%;">'''Tabla 1.''' Valores característicos de las variables que intervienen en los diferentes mecanismos de absorción de energía</span>
 |-
 |  style="border-top: 2pt solid black;border-bottom: 1pt solid black;text-align: right;"|<span style="text-align: center; font-size: 75%;">Variable</span>

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