Dataset of Fatigue Testing on Type III CFRP Composite Pressure Vessels Using a Hydraulic Impulse Test Stand

This dataset contains raw experimental data from cyclic pressure testing of commercially available Type III CFRP composite pressure vessels with an aluminum liner, conducted on a hydraulic impulse test stand. The investigated vessels feature a multi-layer fiber-reinforced overwrap (CFRP and GFRP) and were instrumented with strain gauges (axial – 0° and circumferential – 90°), a Type K thermocouple, and a pressure sensor to capture the structural response under cyclic loading.

Tests were performed in a pressure range between 5 and 45 MPa at a constant frequency of 5 Hz. All sensor signals were recorded at a sampling rate of 600 Hz without any post-processing or filtering, providing fully raw measurement data. To accommodate the test setup, the internal volume of the vessels was reduced using steel displacement bodies.

A total of eight experiments were conducted, resulting in fatigue lives between 22,678 and 41,295 cycles until failure. The vessels exhibited a consistent leak-before-break behavior, with failure detected by a pressure drop due to leakage. Post-test analysis revealed crack initiation in the aluminum liner as the primary failure mechanism, followed by progressive damage in the surrounding CFRP layers and local fluid permeation through the composite structure. No catastrophic fragmentation was observed.

The dataset provides high-resolution, multi-sensor time series data suitable for fatigue analysis, structural health monitoring, and validation of numerical models for composite pressure vessels under cyclic loading.

Overview

Test
Date
File
Cycles
Notes

1
13.01.2026
test_1
22678

2
14.01.2026
test_2
24423

3
15.01.2026
test_3
27434
Strain Gauge 2 has come loose

4
16.01.2026
test_4
27595

5
26.01.2026
test_5
27303

6
27.01.2026
test_6
34523

7
27.01.2026
test_7
41295

8
28.01.2026
test_8
32250

9
19.03.2026
test_9
25998
Stopped after 10000 cyles and restartet after cooling down

本数据集包含了基于液压脉冲试验台开展的循环压力试验原始实验数据，试验对象为市售带铝衬里的III型碳纤维增强复合材料（Carbon Fiber Reinforced Polymer, CFRP）压力容器。

受试容器采用多层纤维增强缠绕包覆结构（包含CFRP与玻璃纤维增强复合材料（Glass Fiber Reinforced Polymer, GFRP）），并装配了轴向（0°）与周向（90°）应变片、K型热电偶以及压力传感器，用于捕捉循环载荷作用下的结构响应特性。

试验在5~45 MPa的压力区间内以5 Hz的恒定频率进行，所有传感器信号以600 Hz的采样率进行采集记录，未施加任何后处理或滤波操作，完整保留了原始测量数据。为适配试验装置，试验采用钢制位移体缩减了容器的内部容积。

共计开展了8组试验，受试容器的疲劳寿命介于22678~41295次循环直至失效。所有容器均表现出一致的先漏后破失效行为，失效通过泄漏引发的压力下降得以判定。试验后分析表明，铝衬里的裂纹萌生为主要失效机制，随后伴随周围CFRP层的渐进损伤以及流体在复合材料结构中的局部渗透，未观察到灾难性碎裂现象。

本数据集提供高分辨率多传感器时间序列数据，可用于循环载荷下复合材料压力容器的疲劳分析、结构健康监测以及数值模型验证。

试验概览

| 试验编号 | 试验日期 | 数据文件 | 循环次数 | 备注 |
|----------|------------------|----------|----------|------------------------------------------|
| 1 | 2026年1月13日 | test_1 | 22678 | 无 |
| 2 | 2026年1月14日 | test_2 | 24423 | 无 |
| 3 | 2026年1月15日 | test_3 | 27434 | 应变片2脱落 |
| 4 | 2026年1月16日 | test_4 | 27595 | 无 |
| 5 | 2026年1月26日 | test_5 | 27303 | 无 |
| 6 | 2026年1月27日 | test_6 | 34523 | 无 |
| 7 | 2026年1月27日 | test_7 | 41295 | 无 |
| 8 | 2026年1月28日 | test_8 | 32250 | 无 |
| 9 | 2026年3月19日 | test_9 | 25998 | 循环至10000次后停止，冷却后重启 |