Environmental stress crack resistance test per ASTM D1693
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Application
The stress cracking strength of polyolefin geomembrane was measured and evaluated by notch constant load tensile test. During the test, the dumbbell sample with notch prepared in advance is placed in the thermostatic surfactant under constant load tension, and the fracture time of the sample is measured and recorded. A series of test results under different stress levels can establish a relationship between the stress level and the fracture time on the logarithmic axis.
Standard
GB/T 17643- Appendix D-2011:Appendix D (Normative) of GB/T 17643-2011 - [Specific Test Method or Requirement]
ASTM D5397-1999:Standard Test Method for Evaluation of Stress Crack Resistance of Polyolefin Geomembranes Using Notched Constant Tensile Load Test
CJ/T 234- Appendix C-2006:Appendix C (Normative) of CJ/T 234-2006 - [Specific Test Method or Requirement]
Feature
1. Multi-station design allows for simultaneous measurement of all stress gradients, resulting in high efficiency and energy savings, while also reducing the equipment footprint;
2. The stations are divided into two groups of 15 each, with independent control for each group, offering flexibility and saving time and energy;
3. LCD display and touchscreen operation provide simple and convenient operation;
4. A simple counterweight mechanism facilitates the calculation and placement of counterweights;
5. The water tank is equipped with an insulation layer to reduce heat loss, saving energy and protecting the environment;
6. Circulation inlet/outlet baffles prevent foreign objects from entering the circulation pipeline and damaging the circulation pump;
7. A dual lifting mechanism for the water tank ensures stable lifting and lowering during operation;
8. The experimental section has a simple and easily removable structure, facilitating cleaning of the inside of the water tank;
9. Constant temperature water bath control technology ensures high temperature control accuracy;
10. An internal solution circulation system ensures uniform solution temperature;
11. Simultaneous loading system reduces the impact of sample loading time on experimental results;
12. High-precision contact switches offer high sensitivity and short response time, reducing experimental errors;
13. An automatic low-water level replenishment device monitors the water level in real time;
14. Equipped with a buzzer for low water level alarm and experiment completion notification;
15. Photoelectric sensors provide precise height control;
16. Professional control program and software calculate the loading weight, making operation simple;
17. Equipped with a professional sample preparation device for simple and convenient operation;
18. The instrument has a streamlined structure, aesthetically pleasing appearance, stable performance, and is safe and reliable.
Parameters
| Description | Details |
|---|---|
| Maximum tensile stress | 20MPa |
| Number of stations | 30 (can be customized) |
| Water bath temperature range | RT - 90°C |
| Temperature control accuracy | ±1°C |
| Switch sensitivity | 200g |
| Timing accuracy | 1s |
| Sample thickness | 0.75 - 3mm |
| Notch depth | 20% of the nominal thickness of the sample (6 - specified as an example value, if relevant) |
| Power supply | AC 380V 50HZ |
| Overall dimensions | 1420x640x1900mm |
| Weight | 380kg |
Accessoriess
1. Main unit: 1 set
2. Sampling mold: 1 piece
3. Cutting tool: 1 piece
4. Utility knife blades: 1 box
5. Hole punch: 1 piece
6. Eyelet punch set: 1 set
7. Eyelet rings: 1000 pieces
8. Counterweights: Several
9. Standard sample pieces: 30 pieces
10. Product packing list: 1 copy
11. Product manual: 1 copy
12. Product certificate of conformity: 1 copy
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