5.4 Week14 Note

This week is about Composites 合成.

materials

compression vs tension

  • epoxy + carbon fiber 环氧树脂+碳纤维
  • concrete + rebar 混凝土+钢筋
  • fiberglass
  • FR1, FR4
  • tire
  • adobe
  • wood

fiber

  • chopped, filament 灯丝, tape, fabric
  • glass
  • carbon

  • aramid 芳纶, Kevlar

  • natural: cotton, silk, bamboo, wood, linen 亚麻, burlap 粗麻布, ...

matrix

  • epoxy
  • polyester
  • phenolic
  • urethane
  • wax
  • cement
  • natural: plant resins, sugars, ...

vendors

design

  • plies
  • radius of curvature 曲率
  • cores
  • spar 晶石, rib, skin
  • digital

start with the fabric, cutted down the shape

processes

  • cutting, darts, net-shape
  • compaction 压实, infusion 浸泡, volume fraction 体积分数
  • coupons
  • open, closed mold
  • wet lay-up, pre-preg, RTM, VARTM

  • compression molding 压缩模塑法

    press, clamps, hydrostatic

  • vacuum bagging

    mold, release, laminate层压板, core, peel ply, bleeder分压器, breather, bag, sealant tape密封, pump

  • autoclave 高压锅

  • pultrusion 拉挤成型
  • trimming
  • clear coat

molds

  • machined
  • folded
  • skinned

safety

  • particles, inhalation, rashes
  • respirators, googles, gloves
  • fumes, ventilation
  • exotherm

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