Materiales.Compuestos at 20:01, 27 October 2022

2022-10-27T20:01:50Z

Materiales.Compuestos at 20:01, 27 October 2022

2022-10-27T20:01:00Z

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Scipediacontent at 11:15, 7 May 2022

2022-05-07T11:15:50Z

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Scipediacontent: Scipediacontent moved page Draft Content 489933066 to Argarate et al 2019a

2022-03-31T18:59:23Z

Scipediacontent moved page Draft Content 489933066 to Argarate et al 2019a

Scipediacontent: Created page with "== Abstract == The automotive industry has benefited to some extent from composites for several decades, especially for non-primary structural applications. Technologies such..."

2022-03-31T18:59:20Z

Created page with "== Abstract == The automotive industry has benefited to some extent from composites for several decades, especially for non-primary structural applications. Technologies such..."

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== Abstract ==

The automotive industry has benefited to some extent from composites for several decades, especially for non-primary structural applications. Technologies such as GMT, LFT or SMC are used to manufacture interior components, functional parts or body parts, with productivity standards and very competitive prices. But despite these successful applications, their expansion to more structural parts is not possible because of the limited properties of the materials and largely because the current manufacturing processes and facilities are not ready for mass manufacturing.
When it is intended to manufacture pieces with high fiber contents and / or large pieces, the increase in fiber content decreases the permeability of the preform, necessitating longer filling times, and generating impregnation problems and high pore contents. In order to solve these drawbacks associated with conventional RTM, different alternatives have been explored: increasing the injection pressure, injecting through multiple entries or reducing the viscosity of the resin among others. One of the most promising is the combination of RTM and compression, called CRTM (Compression RTM). Comparing with conventional RTM, the mold remains partially open in the injection phase, generating a space not occupied by the fibers that exerts a preferred flow path for the resin without having to penetrate the preform.
The objective of the project has been to characterize the CRTM process and apply this knowledge in the manufacture of a side door reinforcement.

== Full document ==
<pdf>Media:Draft_Content_489933066native-articles-232.pdf</pdf>

@@ Line 1: / Line 1: @@
 <span id="_Hlk482186465"></span><span id="_Hlk482179870"></span>
-=='''1''' Introducción==
+==1 Introducción==
 <span id='_Hlk482284890'></span>The main project drivers, have been CO<sub>2</sub> emission restrictions and the potentiality of composite materials(CFRP) for saving weight and improve other characteristics like; impact energy dissipation, specific stiffness and strength and fatigue resistance [1-2].
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 Project challenges have been to get a competitive manufacturing process and installation that will be able to get short cycle time, good quality, repeatability and high automation level. Finally, the process should be validated with a real part; in this case, a door reinforcement.
-=='''2''' RTM variants. Cost analysis comparison==
+==2 RTM variants. Cost analysis comparison==
 <span id='_Hlk482284917'></span>The starting point of the project was to analyze with a real case study and using simulation like tool, the cost of this process compared with other RTM variants [3].
@@ Line 48: / Line 48: @@
 - CRTM has limitations for complex geometrical parts.
-=='''3''' CRTM process characterization==
+==3 CRTM process characterization==
 Fagor Arrasate wanted to do a depth analysis of the CRTM process and take a more fundamental knowledge of the physics of impregnation: the compression impregnation step leads to an interaction of the preform compressibility and the flow front which is usually not considered in conventional RTM. The thickness of the gap on the preform during injection or mold closure strategy during compression must be carefully selected according to the objective (minimize the filling time or reduce the closing force) [4-7]. Therefore, to develop this innovative process it is necessary to use a holistic approach encompassing both mold design and configuration of the press, an understanding of variable preform compaction by the through-thickness flow front using advanced experimental techniques (materials characterization, process control and monitoring parameters) and robust computational models [8].
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 <span style="text-align: center; font-size: 75%;">'''Figure 8. '''Compression force vs speed.</span></div>
-=='''4''' Door reinforcement==
+==4 Door reinforcement==
 An anti-intrusion bar has been designed and manufactured for the door of a car. It is a type demonstrator, not a real component, which nevertheless has almost all the geometric characteristics of an actual component of this type. The design process was carried out based on finite elements and the manufacturing process was also designed using the PAM-RTM software. In addition, a prototype was developed before launching the fabrication of the metal mold, using a mold made in 3D printing.
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 <span id='_Hlk482283183'></span>
-=='''5''' New press and cell for Advanced CRTM==
+==5 New press and cell for Advanced CRTM==
 A new press architecture has been developed adjusted for composite processes and with a specific control system customized for CRTM process. Other characteristics of the press are:
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 <span style="text-align: center; font-size: 75%;">'''Figure 12. '''CRTM manufacturing cell.</span></div>
-=='''6''' Conclusions==
+==6 Conclusions==
 -CRTM is the most suitable manufacturing process from cost, energy consumption and cycle time point of view.

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Argarate et al 2019a - Revision history

Materiales.Compuestos at 20:01, 27 October 2022

Materiales.Compuestos at 20:01, 27 October 2022

Scipediacontent at 11:15, 7 May 2022

Scipediacontent: Scipediacontent moved page Draft Content 489933066 to Argarate et al 2019a

Scipediacontent: Created page with "== Abstract == The automotive industry has benefited to some extent from composites for several decades, especially for non-primary structural applications. Technologies such..."