Reasons for choosing our testing services
ZHONGXI Testing has obtained inspection qualification certifications from multiple countries and regions worldwide. We possess a senior testing team and advanced testing methods, providing independent, impartial, and professional third-party verification services for global carbon projects.
Internationally recognized authority
Certified by multiple international standards such as CNAS, VCS, and GS, with reports universally applicable worldwide.
Global service capability
Covering 140+ countries and regions, it supports on-site detection and remote verification in multiple languages.
Professional experimental methods
Adopt standard experimental methods to ensure accurate and reliable data.
Before sending samples for quasi-static load-displacement analysis, most engineers ask one question: Does this lab cover my material? The answer is generally yes. Our laboratory is equipped to handle diverse materials, including metals, polymers, composites, ceramics, and specialized alloys, across various grades and applications. Whether it’s structural components, mechanical parts, or materials for industrial use, our testing capabilities align with most material testing requirements. This service is particularly relevant for evaluating material behavior under controlled, low-to-medium velocity loading conditions, providing critical data for design validation, failure analysis, and compliance verification.
Testing Scope
Our quasi-static load-displacement analysis service applies to a broad spectrum of materials and product types. Applicable materials include, but are not limited to:
- Metals (e.g., steel, aluminum, stainless steel, titanium)
- Polymers (e.g., plastics, elastomers, thermosets)
- Composites (e.g., fiber-reinforced polymers, sandwich panels)
- Ceramics and glasses
- Alloys and specialty materials
Materials are tested in various forms, such as sheets, bars, rods, specimens, and component parts. Application scenarios include structural engineering, automotive manufacturing, aerospace components, consumer goods, and industrial equipment. Commonly referenced standards for this testing include ASTM E8/E18, ISO 695, EN 10002, GB/T 228, and others depending on material type and regional requirements.
Testing Items and Parameters
Quasi-static load-displacement analysis involves evaluating material response under controlled loading. Key test items and parameters include:
- Engineering stress-strain curves
- Young’s modulus (elastic modulus)
- yield strength (0.2% offset method)
- tensile strength
- Percentage elongation
- Fracture toughness (for certain materials)
- Deformation behavior under load
Typical parameters are summarized in the table below:
| Test Parameter | Typical Range | Graded Limit Requirement |
|---|---|---|
| Young’s Modulus (E) | 1-500 GPa | ±5% for materials ≤ 100 GPa, ±3% for materials > 100 GPa |
| tensile strength (σUTS) | 10-2000 MPa | ±5% for materials ≤ 1000 MPa, ±3% for materials > 1000 MPa |
| yield strength (σY) | 10-2000 MPa | ±4% for materials ≤ 1000 MPa, ±2.5% for materials > 1000 MPa |
| Percentage Elongation (δ) | 0.5-50% | ±5% of measured value |
The graded limit requirements ensure precision and consistency, aligned with industry standards. Test conditions (e.g., temperature, humidity) are controlled as per client specifications or relevant standards.
Data and Variation Analysis
In quasi-static load-displacement analysis, assessing parallel-sample and batch-to-batch variation is critical. For parallel-sample variation, relative deviation between duplicate or triplicate specimens is calculated using the formula:
Relative Deviation (%) = [(Value₁ - Value₂) / Average Value] × 100
Typical acceptance windows for key parameters are:
- Youth modulus: ±5% for materials ≤ 100 GPa, ±3% for materials > 100 GPa
- tensile strength: ±5% for materials ≤ 1000 MPa, ±3% for materials > 1000 MPa
- yield strength: ±4% for materials ≤ 1000 MPa, ±2.5% for materials > 1000 MPa
- Percentage elongation: ±5% of measured value
Batch-to-batch variation is analyzed by comparing results from different production batches or material lots. Statistical methods such as coefficient of variation (CV) are employed to quantify consistency. Data is reported with confidence intervals (typically 95%), and any significant deviations are highlighted. This analysis ensures material consistency and reliability for clients.
Client collaboration is encouraged to refine the testing plan. Clients are welcome to share drawings, material grades or purchase specifications so that the testing plan can be matched precisely to their requirements.