Mehaho e entsoeng ka laminated e kopantsoeng, haholo-holo e kopanyang li-polymers tse matlafalitsoeng ka carbon fiber (CFRP) le li-alloys tsa titanium, li bohlokoa ho boenjiniere ba sejoale-joale ba sepakapaka ka lebaka la tekanyo ea bona e phahameng ea boima ba 'mele, ho hanyetsa kutu, le ts'ebetso ea mokhathala. Lisebelisoa tsena tse nyalisitsoeng, tseo hangata li bitsoang li-stacks tsa CFRP/Ti, li sebelisoa likarolong tsa bohlokoa tsa lifofane tse kang matlalo a mapheo, liphanele tsa fuselage le li-mounts tsa enjine. Leha ho le joalo, boqapi ba meaho ena, haholo-holo ka lits'ebetso tsa taolo ea linomoro tsa komporo (CNC) joalo ka ho cheka, ho sila le ho poma, ho baka liphephetso tse kholo ka lebaka la thepa e fapaneng ea mochini le mocheso oa CFRP le li-alloys tsa titanium. E 'ngoe ea lintlha tsa bohlokoa ka ho fetisisa ke delamination, mokhoa oa ho hlōleha moo likarolo tsa motsoako li arohaneng, tse senyang botšepehi ba sebopeho.

Tšenyo ea delamination ka har'a mekotla ea CFRP / Ti e bakoa ke litšebelisano tse rarahaneng lipakeng tsa jiometry ea sesebelisoa, liparamente tsa machining, anisotropy ea thepa, le litlamorao tsa mochini oa mocheso. Phetoho ea tšenyo ena e laoloa ke mekhoa e kang fiber-matrix debonding, interlayer cracking, le ho senyeha ha mocheso ho bakoang ke li-chips tsa titanium tse phahameng haholo. Maano a khatello ea liphoso a ikemiselitse ho fokotsa litaba tsena ka moralo o ntlafalitsoeng oa lisebelisoa, mekhoa e tsoetseng pele ea machining, le taolo ea paramethara ea ts'ebetso. Sengoliloeng sena se fana ka tlhahlobo e felletseng ea mokhoa oa ho iphetola ha tšenyo ea delamination le maano a khatello ea phoso CNC lisebelisoa ea lifofane CFRP / Ti laminated mehaho, tšehetsoa ke litafole tse qaqileng bakeng sa tlhahlobo papiso.

## Thepa ea Material ea CFRP le Titanium Alloys

### Carbon Fiber Reinforced Polymers (CFRP)

CFRP e na le likhoele tsa khabone tse kentsoeng ka har'a matrix a polymer, hangata epoxy, e fanang ka matla a ikhethang a ho tiea, ho satalla le letsoalo le tlase. Thepa ea mochini ea CFRP e na le anisotropic e phahameng haholo, 'me matla le ho satalla ho holisitsoe ka lehlakoreng la fiber. Litlhophiso tse tloaelehileng tsa CFRP sepakapakeng li kenyelletsa li-laminate tsa unidirectional, tse lohiloeng le tse fapaneng, e 'ngoe le e 'ngoe e na le boits'oaro bo ikhethang ba machining.

- **Matla a Tensile**: Ho fihla ho 3,500 MPa ka tataiso ea fiber.
- **Modulus ea Mocha**: 230–400 GPa hammoho le tataiso ea fiber.
- **Boima**: 1.5–1.8 g/cm³.
- **Thermal Conductivity**: Tlase, hangata 0.5–5 W/m·K.
- **Mocheso oa Phetoho ea Khalase**: 120–180°C bakeng sa matrices a epoxy.

The heterogeneity ea CFRP e lebisa mathateng a machining, ho kenyeletsoa ho hula fiber, ho phatloha ha matrix, le delamination, haholo-holo monyako le ho tsoa ha masoba a entsoeng ka mochini.

### Lisebelisoa tsa Titanium

Li-alloys tsa Titanium, tse kang Ti6Al4V, li nkoa e le tsa bohlokoa sebakeng sa sefofane ka lebaka la matla a tsona a phahameng, ho hanyetsa kutu, le bokhoni ba ho mamella mocheso o phahameng. Leha ho le joalo, conductivity ea bona e tlaase ea mocheso le lik'hemik'hale tse phahameng tsa lik'hemik'hale tse nang le lisebelisoa tsa ho itšeha li etsa hore ho be thata ho etsa mochine.

- **Tensile Matla**: 900–1,200 MPa.
- **Modulus ea Mocha**: 110–120 GPa.
- **Boima**: 4.4–4.5 g/cm³.
- **Thermal Conductivity**: 6–7 W/m·K.
- **Ntlha e qhibilihang**: ~1,650°C.

Nakong ea machining a CNC, li-alloys tsa titanium li hlahisa mocheso o phahameng oa ho itšeha 'me li hlahisa li-chips tse tsoelang pele tse ka senyang likarolo tse haufi tsa CFRP, li mpefatsa delamination.

### CFRP/Ti Stacks

Lipalo tsa CFRP/Ti li kopanya thepa e bobebe ea CFRP le ho tšoarella ha titanium, ho etsa meaho e nyalisitsoeng e tlanngoeng ka mochini (mohlala, e kentsoeng ka bolt kapa e kentsoeng) likopanong tsa lifofane. Phapang ea thepa ea mochini le ea mocheso lipakeng tsa CFRP le titanium e thatafatsa machining, kaha lisebelisoa tse ntlafalitsoeng bakeng sa thepa e le 'ngoe li kanna tsa se sebetse hantle ho tse ling. Letlapa la 1 le bapisa thepa ea bohlokoa ea CFRP le Ti6Al4V.

**Letlapa la 1: Papiso ea Thepa ea CFRP le Ti6Al4V**

| Thepa | CFRP (Unidirectional) | Ti6Al4V |
|----------------------------------------------------------------------|
| Tensile Strength (MPa) | 2,500–3,500 | 900–1,200 |
| Young's Modulus (GPA) | 230–400 | 110–120 |
| Boima ba 'mele (g/cm³) | 1.5–1.8 | 4.4–4.5 |
| Thermal Conductivity (W/m·K) | 0.5–5 | 6-7 |
| Katoloso ea Mocheso (10⁻⁶/K) | ~0 (taelo ea fiber) | 8.6–9.0 |
| Thata | Tlase (e itšetlehileng ka matrix) | 330–380 HV |

## Tšenyo ea Delamination ho CNC Machining

### Tlhaloso le Bohlokoa

Delamination ke karohano ea lera ka hare ho laminated composite, ka lebaka la likhatello interlaminar feta matla interlayer thepa. Ka har'a mekotla ea CFRP/Ti, delamination e bonahala e le ho hula (monyakong) kapa ho sutumelletsa kantle (ho tsoa) likoli, ho fokotsa bophelo ba mokhathala le ho sekisetsa. fastener tshebetso. Delamination e kotsi haholo sebakeng sa sefofane, moo ho ts'epahala ha sebopeho ho leng bohlokoa haholo.

### Mefuta ea Delamination

Delamination ka har'a mekotla ea CFRP/Ti e ka aroloa ka mefuta e meraro ho latela maemo a ASTM D5528 le litebello tsa liteko:

1. **Mofuta oa I (Peel-Up Delamination)**: E etsahala monyako ka lebaka la matla a ho sutumelletsa holimo ho tsoa ho boro, e leng se etsang hore likarolo tse ka holimo li phahamisoe.
2. **Mofuta oa II (Push-Out Delamination)**: E etsahala ha ho tsoa ka lebaka la likarolo tse sa tšehetsoeng tse kobehang tlas'a matla a axial.
3. **Mofuta oa III (Thermal-Induced Delamination)**: Liphetho tse tsoang ho li-chips tsa titanium tsa mocheso o phahameng tse nolofatsang matrix a CFRP, ho fokotsa matla a interlaminar.

### Lintlha tse Susumetsang ho Delamination

Delamination e susumetsoa ke lintlha tse ngata, ho kenyelletsa:

- ** Tool Geometry**: Ho cheka ntlha ea ho cheka, angle ea helix, le bohale ba bohale bo ama matla a ho phunya le sebopeho sa chip.
* ** Mekhahlelo ea ho sebetsa **: Sekhahla sa phepelo, lebelo la spindle, le lebelo la ho itšeha li khetholla matla a ho itšeha le ho hlahisa mocheso.
- **Material Anisotropy**: Tshekamelo ya faeba (mohlala, 0°, 45°, 90°) e ama ho hanana le karohano ya lehare.
- **Thermal Effects**: Ho fokotseha ha mocheso oa Titanium ho lebisa ho bokellaneng ha mocheso, ho theola matrix a CFRP.
- **Maemo a Tšehetso**:

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