Short answer

When using vacuum bagging and oven curing for composites, prioritize the selection of mould release agents and the application of intensifiers, and pay close attention to the resulting void shapes to maximize inter-laminar shear strength.

Field: Final Production
Source: Journal of Advanced Research in Applied Sciences and Engineering Technology (2024)
Method: Experimental investigation with material characterization.
Evidence: Strong effect

Optimizing vacuum bagging parameters, specifically mould release type and intensifier usage, significantly enhances the inter-laminar shear strength (ILSS) of oven-cured composites. This final production research insight is drawn from a 2024 study published in Journal of Advanced Research in Applied Sciences and Engineering Technology. Using Experimental investigation with material characterization., researchers explored how this design variable affects real-world outcomes. The key design takeaway: When using vacuum bagging and oven curing for composites, prioritize the selection of mould release agents and the application of intensifiers, and pay close attention to the resulting void shapes to maximize inter-laminar shear strength.

Study

Final ProductionRecentStrong effect

Vacuum bagging optimization boosts composite shear strength by 31% by controlling mould release and intensifier use.

Optimizing vacuum bagging parameters, specifically mould release type and intensifier usage, significantly enhances the inter-laminar shear strength (ILSS) of oven-cured composites.

Journal of Advanced Research in Applied Sciences and Engineering Technology · 2024

Key Findings

01Mould release type contributed the highest effect (approx. 31.3%) towards ILSS.
02Intensifier usage contributed the second highest effect (approx. 27.6%) towards ILSS.
03Void geometry has a greater influence on ILSS than the overall void content.
04The combination of processing factors resulted in the lowest ILSS (24.85 MPa) and void content (5.74%).

Application

Design takeaway

How to apply

When designing or manufacturing composite parts using vacuum bagging and oven curing, conduct trials to identify the optimal mould release agent and intensifier strategy, and use microscopy to analyze void formation and its impact on mechanical properties.

Project actions

01When selecting materials for your design project, consider how their processing affects their final properties.
02Document all processing steps meticulously, as small variations can lead to significant differences in outcomes.

Method & Evidence

AimTo quantify the impact of vacuum-bagging-only with oven curing (VBO-oven cure) processing variations on the inter-laminar shear strength (ILSS) and void characteristics of glass/epoxy composite laminates.

MethodExperimental investigation with material characterization.

Procedure16 different processing routes using vacuum bagging and oven curing were tested with glass/epoxy aerospace-grade materials. ILSS and void content were measured using burn-off and ILSS tests according to ASTM standards. Scanning Electron Microscopy (SEM) was used to analyze void characteristics and their relationship with ILSS.

ContextComposite material manufacturing, specifically out-of-autoclave (OOA) processing for aerospace-grade applications.

Variables

IV["Mould release type","Intensifier usage","Other processing route variations"]

DV["Inter-laminar shear strength (ILSS)","Void content","Void geometry"]

CV["Oven cure temperature and time","Composite material type (glass/epoxy)","ASTM testing standards"]

Strengths & Limitations

Strengths

+Investigated a range of processing parameters.
+Correlated processing with mechanical properties and microstructural features.
+Focused on cost-effective OOA manufacturing.

Limitations

The cost and availability of specific mould release agents and intensifiers might be a practical limitation for some design projects.

Reliability & validity

The use of ASTM standards for testing and SEM for microstructural analysis enhances the validity of the findings. The testing of 16 different processing routes increases the reliability of identifying key influential factors.

Think critically

How might the findings on void geometry's impact on ILSS inform the design of composite structures intended for high-stress applications?

Design Principles

"Process parameter optimization in composite manufacturing directly influences material performance, with specific factors like mould release and void geometry playing critical roles."

This research highlights that even with simpler, out-of-autoclave (OOA) manufacturing methods, meticulous control over processing parameters can yield high-quality composite materials. Understanding these relationships allows designers and manufacturers to achieve superior mechanical properties without the high costs and complexities of traditional autoclave processing.

What This Means for Your Design

Making composite parts without a big oven (autoclave) can still be strong if you choose the right stuff for the mould and how you press it, and pay attention to the tiny air bubbles that form.

How to use in your project

1.Reference this study when discussing the impact of processing parameters on composite material strength and quality in your design project's analysis section.

Add to My Project

Quick Cite

Paragraph starter

Research indicates that in vacuum-bagging-only oven-cured composites, processing parameters like mould release type and intensifier usage significantly influence inter-laminar shear strength (ILSS), with void geometry being more critical than void content. This suggests that careful optimization of these factors can lead to improved material performance in out-of-autoclave manufacturing.

Source

Journal of Advanced Research in Applied Sciences and Engineering Technology

Significant Effect of Vacuum Bagging Processing on Inter-Laminar Shear Strength and Voids of Composite in Oven Cure

journal · 2024

View source

Questions About This Research

What does the research say about vacuum bagging optimization boosts composite shear strength by 31% by controlling mould release and intensifier use?: When using vacuum bagging and oven curing for composites, prioritize the selection of mould release agents and the application of intensifiers, and pay close attention to the resulting void shapes to maximize inter-laminar shear strength. Evidence: Journal of Advanced Research in Applied Sciences and Engineering Technology (2024).
Why does "Vacuum bagging optimization boosts composite shear strength by 31% by controlling mould release and intensifier use." matter for design?: This research highlights that even with simpler, out-of-autoclave (OOA) manufacturing methods, meticulous control over processing parameters can yield high-quality composite materials. Understanding these relationships allows designers and manufacturers to achieve superior mechanical properties without the high costs and complexities of traditional autoclave processing.
How can designers apply this research?: When using vacuum bagging and oven curing for composites, prioritize the selection of mould release agents and the application of intensifiers, and pay close attention to the resulting void shapes to maximize inter-laminar shear strength.
What were the main findings?: Mould release type contributed the highest effect (approx. 31.3%) towards ILSS.. Intensifier usage contributed the second highest effect (approx. 27.6%) towards ILSS.. Void geometry has a greater influence on ILSS than the overall void content.. The combination of processing factors resulted in the lowest ILSS (24.85 MPa) and void content (5.74%).
What research method was used?: Experimental investigation with material characterization..
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2024 journal from Journal of Advanced Research in Applied Sciences and Engineering Technology.
What should I do differently in my next project?: When designing or manufacturing composite parts using vacuum bagging and oven curing, conduct trials to identify the optimal mould release agent and intensifier strategy, and use microscopy to analyze void formation and its impact on mechanical properties.
What are the limitations?: The study focused on conventional glass/epoxy laminates; results may vary for different composite systems. The specific ASTM standards used for testing should be considered.