Polymer Composite Fabrication Quality Control Techniques Training

Objectives:
• Understand the scope and importance of quality control in polymer composite fabrication.
• Identify key composite materials and their properties.
• Recognize the role of quality control in ensuring product reliability and safety.

Topics:
• Overview of polymer composites: types, applications, and benefits.
• Introduction to fabrication processes: hand lay-up, spray-up, RTM, filament winding.
• Quality control fundamentals: definitions, standards, and objectives.
• Regulatory framework: SAQA, NQF, and relevant industry standards.
• Course structure, assessment criteria, and learning outcomes.

Objectives:
• Describe the composition and characteristics of common composite materials.
• Explain the relationship between material properties and quality.
• Identify defects related to material inconsistencies.

Topics:
• Reinforcements: glass, carbon, aramid fibers – forms and properties.
• Resin systems: polyester, epoxy, vinyl ester – curing and performance.
• Core materials: foam, honeycomb, balsa – functions and selection.
• Material specification sheets and quality indicators.
• Common material defects: voids, dry spots, resin-rich areas.

Objectives:
• Differentiate between open and closed mold processes.
• Understand the steps in each fabrication method.
• Identify process parameters affecting quality.

Topics:
• Hand lay-up: process steps, advantages, and quality challenges.
• Spray-up: equipment, technique, and common defects.
• Resin transfer molding (RTM): process, tooling, and quality control points.
• Filament winding: machine setup, winding patterns, and quality criteria.
• Compression molding and pultrusion: principles and applications.

Objectives:
• Develop a quality control plan for composite fabrication.
• Understand the importance of documentation and traceability.
• Apply quality standards to process control.

Topics:
• Elements of a quality control plan: scope, responsibilities, procedures.
• Documentation: work instructions, inspection reports, non-conformance reports.
• Traceability: batch numbering, material lot tracking, process logs.
• Quality standards: ISO 9001, AS9100, and composite-specific standards.
• Statistical process control (SPC) basics: control charts, capability.

Objectives:
• Perform incoming inspection of reinforcements and resins.
• Evaluate material properties using standard tests.
• Identify non-conforming materials and appropriate actions.

Topics:
• Receiving inspection procedures: visual checks, certificates of conformance.
• Reinforcement testing: weight, weave density, moisture content.
• Resin testing: viscosity, gel time, reactivity, shelf life.
• Core material inspection: density, thickness, adhesion.
• Material storage and handling requirements to prevent degradation.

Objectives:
• Monitor key process parameters during fabrication.
• Use process control tools to maintain consistency.
• Identify and correct process deviations.

Topics:
• Critical process parameters: temperature, humidity, pressure, cure time.
• Monitoring tools: thermocouples, pressure gauges, data loggers.
• Control methods: set points, alarms, automated adjustments.
• Process validation: first article inspection, capability studies.
• Corrective actions: root cause analysis, process adjustments.

Objectives:
• Understand the principles of common NDT methods for composites.
• Select appropriate NDT technique based on defect type.
• Interpret NDT results to assess quality.

Topics:
• Visual inspection: criteria, lighting, magnification.
• Ultrasonic testing: pulse-echo, through-transmission, phased array.
• Radiography: X-ray and CT scanning for internal defects.
• Thermography: active and passive methods for delamination detection.
• Shearography and acoustic emission: applications and limitations.

Objectives:
• Describe destructive testing techniques for composite evaluation.
• Prepare and test specimens according to standards.
• Analyze test data to determine material properties.

Topics:
• Mechanical testing: tensile, compression, flexural, shear (ASTM/ISO).
• Physical testing: density, fiber volume, void content (burn-off, acid digestion).
• Thermal testing: DSC, TGA for cure state and thermal stability.
• Specimen preparation: cutting, tabbing, conditioning.
• Data analysis: stress-strain curves, modulus calculation, failure modes.

Objectives:
• Identify common defects in composite parts.
• Perform root cause analysis to determine defect origins.
• Recommend corrective and preventive actions.

Topics:
• Defect classification: voids, delamination, wrinkles, porosity, fiber misalignment.
• Defect mapping: location, size, frequency.
• Root cause analysis tools: fishbone diagram, 5 Whys, fault tree.
• Case studies: typical defects in lay-up, RTM, and filament winding.
• Corrective actions: process adjustment, material change, rework procedures.

Objectives:
• Monitor and control cure cycles to achieve desired properties.
• Understand the effect of cure parameters on final quality.
• Perform quality checks after curing.

Topics:
• Cure cycle design: temperature ramps, dwell times, cooling rates.
• Cure monitoring: degree of cure, exotherm, glass transition temperature.
• Post-curing: purpose, schedules, and impact on properties.
• Quality checks: hardness, surface finish, dimensional stability.
• Common curing defects: undercure, overcure, warpage.

Objectives:
• Measure composite parts using appropriate tools.
• Compare measurements to engineering drawings and tolerances.
• Understand geometric dimensioning and tolerancing (GD&T) basics.

Topics:
• Measurement tools: calipers, micrometers, CMM, laser scanners.
• Datums and reference points: alignment and fixturing.
• Tolerancing: standard tolerances, statistical tolerancing.
• GD&T symbols: flatness, parallelism, perpendicularity, profile.
• Reporting: inspection reports, pass/fail criteria, deviation analysis.

Objectives:
• Assess surface quality of composite parts.
• Identify surface defects and their causes.
• Apply acceptance criteria for cosmetic and functional surfaces.

Topics:
• Surface defects: pinholes, blisters, scratches, orange peel.
• Surface roughness measurement: Ra, Rz, profilometry.
• Visual standards: comparator plaques, lighting conditions.
• Coating and painting preparation: surface cleanliness, adhesion tests.
• Acceptance criteria: class A, B, C surfaces per industry standards.

Objectives:
• Inspect adhesive bonds and mechanical fasteners.
• Understand failure modes in joints.
• Perform quality tests on bonded assemblies.

Topics:
• Bonded joints: surface preparation, adhesive application, cure.
• Bond inspection: tap test, ultrasonic, peel tests.
• Bolted joints: torque specification, fastener installation, hole quality.
• Joint failure modes: cohesive, adhesive, fastener shear.
• Quality records: bond logs, torque verification, pull-off tests.

Objectives:
• Understand environmental regulations affecting composite fabrication.
• Implement safety protocols for QC activities.
• Manage hazardous waste and emissions.

Topics:
• Environmental regulations: NEMA, waste management, air quality.
• Safety in QC: PPE, chemical handling, ventilation.
• Hazardous materials: resins, solvents, dust – storage and disposal.
• Emission control: VOC monitoring, scrubbers, permits.
• Safety audits and incident reporting.

Objectives:
• Apply statistical methods to monitor and improve quality.
• Calculate process capability indices.
• Use control charts for ongoing process control.

Topics:
• Descriptive statistics: mean, range, standard deviation.
• Control charts: X-bar and R, p-charts, c-charts.
• Process capability: Cp, Cpk, Pp, Ppk – interpretation.
• Sampling plans: AQL, lot acceptance, ANSI/ASQ standards.
• Software tools: Excel, Minitab for QC data analysis.

Objectives:
• Understand the structure of a quality management system (QMS).
• Perform internal audits of composite fabrication processes.
• Identify non-conformities and opportunities for improvement.

Topics:
• QMS framework: ISO 9001, AS9100, NADCAP.
• Documentation: quality manual, procedures, work instructions.
• Internal auditing: planning, checklists, interviewing, reporting.
• Corrective and preventive actions (CAPA).
• Continuous improvement: PDCA cycle, Kaizen.

Objectives:
• Explore advanced NDT techniques for complex composites.
• Understand automation and digitalization in QC.
• Evaluate new technologies for implementation.

Topics:
• Advanced ultrasonic: phased array, guided waves, air-coupled.
• Digital radiography and computed tomography (CT).
• Laser shearography and digital image correlation (DIC).
• Automation: robotic inspection, inline monitoring.
• Industry 4.0: IoT, big data, machine learning in QC.

Objectives:
• Evaluate and qualify composite material suppliers.
• Implement supplier quality requirements.
• Conduct supplier audits and performance reviews.

Topics:
• Supplier selection criteria: quality, delivery, cost.
• Supplier quality requirements: certifications, test reports.
• Receiving inspection and supplier scorecards.
• Supplier audits: scope, checklist, reporting.
• Non-conformance management with suppliers.

Objectives:
• Apply quality control techniques to real-world scenarios.
• Analyze composite failures and propose solutions.
• Collaborate in team-based problem-solving.

Topics:
• Case study 1: aerospace component – void reduction.
• Case study 2: automotive part – dimensional variation.
• Case study 3: marine structure – blistering and repair.
• Problem-solving methodology: 8D, DMAIC.
• Group presentation of solutions and discussion.

Objectives:
• Demonstrate knowledge and skills through final assessment.
• Review key concepts and address gaps.
• Create a personal action plan for quality improvement.

Topics:
• Written examination: theory and calculations.
• Practical assessment: inspection and reporting task.
• Course review: summary of all modules.
• Q&A session and feedback.
• Issuance of certificates and course evaluation.