Cumulative Damage

Model Product Deterioration with Variable Stress over Time

Cumulative damage models, which include step-stress models, enable you to analyze an accelerated life test where the stress levels might be changed over time. The stress can be applied by many different forces, such as load, temperature, or pressure. A typical cumulative damage experiment consists of multiple test units. Each unit has an initial stress level, and the stress level can be changed throughout the experiment. The response is the failure time or time-to-event. The platform plots the failure events and enables you to fit multiple distributions to your data.

Figure 5.1 Example of Cumulative Damage Report 

Contents

Overview of the Cumulative Damage Platform

Example of the Cumulative Damage Platform

Launch the Cumulative Damage Platform

Time to Event

Stress Pattern

The Cumulative Damage Report

Event Plot

Stress Patterns Report

Model List

Model Results

Cumulative Damage Platform Options

Stress Patterns Option

Additional Example of the Cumulative Damage Platform