curing-steps

Curing Steps Analysis

Description

Configure 4-step curing analysis (vis, rub, glassy, sp) in Abaqus. Invoke when user needs curing step sequence, static step settings, or step-by-step curing process setup.

Content

The composite curing simulation uses 4 steps in sequence, all defined as *Static steps with nlgeom=NO.

Step Sequence

Step 1: vis (viscous state)

• Increment control: 0.1, 1., 1e-05, 0.5
• Temperature: 150°C
• Pressure: 0.6 MPa
• Friction: 0.45
• Tool BC: U1=0, U2=0

Step 2: rub (rubbery state)

• Increment control: 0.1, 1., 1e-05, 0.3
• Temperature: 180°C
• Pressure: 0.6 MPa
• Friction: 0.2 (taumax=0.55)
• Tool BC: continues from vis step

Step 3: glassy (glassy state)

• Increment control: 0.1, 1., 1e-05, 0.5
• Temperature: 25°C
• Pressure: No pressure
• Friction: 0.169
• Tool BC: continues from rub step

Step 4: sp (springback)

• Increment control: 0.1, 1., 1e-05, 0.5
• Temperature: 25°C
• Pressure: No pressure
• BC: Set-2 U1=U2=U3=0
• Model Change: removes contact + tool

Static Step Format

The *Static step uses the following format with initial increment, total time, min increment, and max increment:

*Static
initial_increment, total_time, min_increment, max_increment

Example for vis step:

*Static
0.1, 1., 1e-05, 0.5

Output Requests Per Step

Each step includes the following output requests:

*Output, field
*Node Output
CF, NT, RF, U
*Element Output, directions=YES
LE, PE, PEEQ, PEMAG, S, SDV, TEMP
*Contact Output
CDISP, CSTRESS
*Output, history, variable=PRESELECT

Restart Configuration

No restart output is written:

*Restart, write, frequency=0

Step Transitions

Loads and boundary conditions carry forward from one step to the next unless explicitly replaced with op=NEW. This means:

• Tool BCs applied in the vis step remain active through the glassy step
• Pressure applied in vis/rub steps is carried forward unless removed
• To replace all previous loads/BCs, use op=NEW on the load or BC keyword