Summary of Compression After Impact (CAI) Simulation Guide

The "Compression After Impact (CAI) Guide" provides detailed procedures for simulating the residual compressive strength of composite panels after an impact event. The key contents are summarized into the following core sections:

1. Multi-Step Scenario Process

This guide explains how to implement two consecutive physical events within a single simulation scenario.

• Step 1: Impact: The process where an impactor strikes the composite panel, causing internal and external damage (e.g., delamination, fiber breakage).
• Step 2: Compression: Applying a compressive load to the pre-damaged panel to measure its residual structural integrity.

2. Result Analysis and Sensor Definition

• Reaction Force Measurement: By monitoring the reaction force during compression, you can identify the Peak Force (ultimate strength) the structure can withstand.
• Energy Review: To verify the validity of the explicit dynamic analysis, the ratio of Internal Energy to Total Energy (and monitoring Artificial Energy/Hourglassing) must be evaluated.
• Damage Visualization: Visually inspect the stress distribution and the extent of the failure zones (damaged area) resulting from the impact.