[{"data":1,"prerenderedAt":426},["ShallowReactive",2],{"doc-/logbook-experiments/body/vacuum_infusion_composite":3},{"id":4,"title":5,"author":6,"body":7,"date":411,"description":412,"extension":413,"image":414,"location":415,"meta":416,"navigation":417,"path":418,"seo":419,"stem":420,"tags":421,"__hash__":425},"content/logbook-experiments/body/vacuum_infusion_composite.md","[LOGBOOK] Implementation of Vacuum Infusion Process (VIP) and Composite Material Specifications","M. Taufiq",{"type":8,"value":9,"toc":393},"minimark",[10,15,24,36,39,43,49,52,68,70,74,85,88,99,101,105,112,115,126,128,132,137,144,152,157,169,171,175,178,183,186,205,214,216,220,223,238,240,244,333,335,339,342,353,355,359,362,373,375,379],[11,12,14],"h2",{"id":13},"introduction","Introduction",[16,17,18,19,23],"p",{},"Manufacturing methods play a vital role in determining the mechanical properties, final weight, and surface quality of composite structures. Compared to conventional ",[20,21,22],"em",{},"hand lay-up"," methods, vacuum-assisted processes offer better control of the fiber–resin ratio and significantly reduce the formation of air voids.",[16,25,26,27,30,31,35],{},"Among various ",[20,28,29],{},"closed-mold"," techniques, the ",[32,33,34],"strong",{},"Vacuum Infusion Process (VIP)"," is selected as a high-performance solution for manufacturing components that require high strength with low structural weight.",[37,38],"hr",{},[11,40,42],{"id":41},"_1-rationale-for-using-vacuum-infusion","1. Rationale for Using Vacuum Infusion",[16,44,45,46,48],{},"The Vacuum Infusion Process (VIP) is a ",[20,47,29],{}," manufacturing method in which dry fiber reinforcements are placed on a mold surface and sealed using an airtight vacuum bag. Resin is then drawn into the fiber layers by the pressure difference between atmospheric pressure and the vacuum inside the bag.",[16,50,51],{},"The main motivations for using this method include:",[53,54,55,59,62,65],"ul",{},[56,57,58],"li",{},"High strength-to-weight ratio",[56,60,61],{},"Improved laminate consolidation",[56,63,64],{},"Low emission of volatile organic compounds (VOC)",[56,66,67],{},"High process repeatability",[37,69],{},[11,71,73],{"id":72},"_2-quality-characteristics","2. Quality Characteristics",[16,75,76,77,80,81,84],{},"The primary advantage of VIP is its ability to achieve a high ",[32,78,79],{},"Fiber Volume Fraction (Vf)",", typically in the range of ",[32,82,83],{},"50–60%",".",[16,86,87],{},"This condition results in:",[53,89,90,93,96],{},[56,91,92],{},"Very low void content (\u003C 1%)",[56,94,95],{},"Uniform resin distribution, even in complex geometries",[56,97,98],{},"Consistent structural quality",[37,100],{},[11,102,104],{"id":103},"_3-hydrodynamic-and-structural-performance","3. Hydrodynamic and Structural Performance",[16,106,107,108,111],{},"The VIP method is particularly suitable for ",[32,109,110],{},"marine applications",", such as hull structures and floating vehicles.",[16,113,114],{},"Key benefits include:",[53,116,117,120,123],{},[56,118,119],{},"Reduced structural weight, improving buoyancy",[56,121,122],{},"Enhanced fatigue resistance under cyclic wave loading",[56,124,125],{},"Smooth outer surfaces that reduce skin-friction drag",[37,127],{},[11,129,131],{"id":130},"_4-material-specifications-and-laminate-configuration","4. Material Specifications and Laminate Configuration",[133,134,136],"h3",{"id":135},"_41-matrix-system-epoxy-resin","4.1 Matrix System: Epoxy Resin",[16,138,139,140,143],{},"An ",[32,141,142],{},"epoxy resin system"," is used as the matrix material with the following specification:",[53,145,146],{},[56,147,148,151],{},[32,149,150],{},"Mixing ratio:"," 3 parts resin : 1 part hardener (3:1)",[16,153,154],{},[32,155,156],{},"Reasons for selecting epoxy resin:",[158,159,160,163,166],"ol",{},[56,161,162],{},"Superior mechanical properties and fiber adhesion compared to polyester and vinyl ester resins",[56,164,165],{},"Low volumetric shrinkage during the curing process",[56,167,168],{},"Excellent resistance to water absorption and chemical degradation",[37,170],{},[133,172,174],{"id":173},"_42-laminate-schedule","4.2 Laminate Schedule",[16,176,177],{},"The laminate configuration applied in this design is:",[16,179,180],{},[32,181,182],{},"WR – Mat – WR – Mat – WR",[16,184,185],{},"Material description:",[53,187,188,197],{},[56,189,190,193,196],{},[32,191,192],{},"Woven Roving (WR)",[194,195],"br",{},"\nActs as the primary structural reinforcement, providing tensile strength and stiffness.",[56,198,199,202,204],{},[32,200,201],{},"Chopped Strand Mat (CSM/Mat)",[194,203],{},"\nServes as an interlaminar layer to enhance bonding between layers and to increase laminate thickness.",[206,207,208],"blockquote",{},[16,209,210,213],{},[32,211,212],{},"Note:"," Powder-bound CSM is used, as emulsion-bound CSM is not compatible with epoxy resin systems and vacuum infusion processes.",[37,215],{},[133,217,219],{"id":218},"_43-laminate-configuration-mechanism","4.3 Laminate Configuration Mechanism",[16,221,222],{},"The alternating laminate configuration is applied for the following technical reasons:",[53,224,225,228,231],{},[56,226,227],{},"Improved interlaminar bonding",[56,229,230],{},"More uniform shear stress distribution between stiff WR layers",[56,232,233,234,237],{},"Reduction of surface ",[20,235,236],{},"print-through"," effects",[37,239],{},[11,241,243],{"id":242},"_5-manufacturing-method-comparison","5. Manufacturing Method Comparison",[245,246,247,263],"table",{},[248,249,250],"thead",{},[251,252,253,257,260],"tr",{},[254,255,256],"th",{},"Aspect",[254,258,259],{},"Vacuum Infusion (VIP)",[254,261,262],{},"Hand Lay-up",[264,265,266,278,289,300,311,322],"tbody",{},[251,267,268,272,275],{},[269,270,271],"td",{},"Common Resin Type",[269,273,274],{},"Epoxy / Vinyl Ester",[269,276,277],{},"Polyester",[251,279,280,283,286],{},[269,281,282],{},"Pressure Mechanism",[269,284,285],{},"Atmospheric pressure (vacuum-assisted)",[269,287,288],{},"Manual roller pressure",[251,290,291,294,297],{},[269,292,293],{},"Fiber–Resin Ratio",[269,295,296],{},"High (fiber-dominant)",[269,298,299],{},"Low (resin-dominant)",[251,301,302,305,308],{},[269,303,304],{},"Void Content",[269,306,307],{},"Very low (\u003C1%)",[269,309,310],{},"High (2–5%)",[251,312,313,316,319],{},[269,314,315],{},"Specific Strength",[269,317,318],{},"High",[269,320,321],{},"Moderate",[251,323,324,327,330],{},[269,325,326],{},"VOC Emissions",[269,328,329],{},"Low (closed system)",[269,331,332],{},"High (open system)",[37,334],{},[11,336,338],{"id":337},"_6-relevance-for-vehicle-development","6. Relevance for Vehicle Development",[16,340,341],{},"From an engineering perspective, the combination of VIP and epoxy resin offers:",[53,343,344,347,350],{},[56,345,346],{},"Optimal stiffness-to-weight ratio",[56,348,349],{},"High geometric accuracy and laminate uniformity",[56,351,352],{},"Efficient use of resin material without excessive waste",[37,354],{},[11,356,358],{"id":357},"_7-design-limitations","7. Design Limitations",[16,360,361],{},"Despite its advantages, the VIP method has several limitations:",[53,363,364,367,370],{},[56,365,366],{},"The 3:1 epoxy mixing ratio requires high accuracy to avoid incomplete curing or excessive exothermic reactions",[56,368,369],{},"Higher material and consumable costs compared to conventional polyester systems",[56,371,372],{},"Longer preparation and setup time due to vacuum bagging requirements",[37,374],{},[11,376,378],{"id":377},"conclusion","Conclusion",[16,380,381,382,384,385,388,389,392],{},"The application of the ",[32,383,34],{}," using an ",[32,386,387],{},"epoxy resin system with a 3:1 mixing ratio"," and a ",[32,390,391],{},"WR–Mat–WR–Mat–WR laminate configuration"," results in a composite structure with high specific strength, excellent water resistance, and superior dimensional accuracy. This approach represents an ideal manufacturing standard for high-performance marine and lightweight structural applications.",{"title":394,"searchDepth":395,"depth":395,"links":396},"",2,[397,398,399,400,401,407,408,409,410],{"id":13,"depth":395,"text":14},{"id":41,"depth":395,"text":42},{"id":72,"depth":395,"text":73},{"id":103,"depth":395,"text":104},{"id":130,"depth":395,"text":131,"children":402},[403,405,406],{"id":135,"depth":404,"text":136},3,{"id":173,"depth":404,"text":174},{"id":218,"depth":404,"text":219},{"id":242,"depth":395,"text":243},{"id":337,"depth":395,"text":338},{"id":357,"depth":395,"text":358},{"id":377,"depth":395,"text":378},"15 December 2025","Implementation of Vacuum Infusion Process (VIP) for lightweight composite structures, focusing on laminate design, material specifications, and performance in marine applications.","md","/images/research/body-design/vacuum.webp",null,{},true,"/logbook-experiments/body/vacuum_infusion_composite",{"title":5,"description":412},"logbook-experiments/body/vacuum_infusion_composite",[422,423,424],"Composite Materials","Vacuum Infusion","Hull Manufacturing","W_KEq9bRt4BPu12Pptw_askAJI3KhX889xSkVbIkoMs",1768857524013]