Current：The performance evaluation is mainly for the load excitation test of the connection structure. In the test design, the commonly used test methods include scaling test, product sample test and so on.
The performance evaluation is mainly for the load excitation test of the connection structure. In the test design, the commonly used test methods include scaling test, product sample test, equivalent acceleration test and so on. Connected structure excitation tests, reliability verification and failure analysis help to ensure the safety, reliability and standardization of engineering structures, as well as provide support for technological advancement and reduce risks, which are indispensable and important steps in the engineering field.
Connection structure load excitation test: carry out different temperature environment simulation and different forms of load excitation function of the bolted structure test, the form of load including axial, shear, torsion, eccentricity, random and other load excitation. The following figure shows the sketch of the main part of the test system. The tensile/torsion load can be applied to the bolted structure through the loading bar, the eccentricity distance of the bending moment of the bolted structure can be controlled through the positioning aid and scale, and the shear, transverse and axial load can be applied through the customized fixture.
Formulate the bolt tightening strategy: the main preload control methods are torque method, cornering method, yield point method, tensile method and so on. The choice of preload control method will affect the load carrying capacity and fatigue performance of the bolt. In some design manuals, the choice of preload control method even affects the selection of bolts. The tightening parameters formulated by national or industry standards take less account of the materials of connected parts, friction coefficients, and complex service environments, and are prone to safety hazards.
Services
☆ Experimental design for scale-up/specimen/equivalent acceleration tests
☆ Stimulation test and reliability verification of connecting structures with different load forms
☆ Reliability test for special environments and material fastening connections.
☆ Performance evaluation test of anti-loosening connection structure
☆ Iterative technology solutions based on feedback from performance evaluations
☆ Design and Optimization of Assembly Strategies for Bolt Connections
☆ Installation process, tool evaluation selection and optimization
Service Advantages
Advantage of equipment: the team has a variety of multi-axis fatigue test equipment with different load capacity, and designed a variety of test fixtures, and at the same time with the relevant processing plant to carry out long-term cooperation, can be designed and processed according to the needs of the test device, can be carried out for various sizes of samples to carry out a variety of forms of load test.
Experience advantage: In the past ten years of research, the team has carried out a large number of experimental studies for various types of load forms, special environments, special materials, anti-loosening structure, with a strong research foundation. In the long-term research, the team has accumulated the ability to design tests for non-standard tests such as scaling test, product sample test and equivalent acceleration test.
Simulation Advantage: The company has fast and accurate modeling software for fasteners, which can quickly complete the finite element analysis of the tightening process of various types, different sizes, and different fit precision bolts.
Make up for the lack of performance verification capability of connection structures in some design units: many design units may lack the necessary test equipment, professional knowledge and experience to carry out performance verification of connection structures. Organizations providing performance evaluation services have abundant test equipment and professional personnel, which can make up for the deficiencies of design units and ensure the reliability and safety of connection structures.
Comprehensive assessment of connection reliability: Reliability assessment of connection structures requires scientific methods and comprehensive studies, including different environmental conditions, load forms and special materials. Institutions providing performance evaluation services have scientific background and professional knowledge, especially research on contact behavior analysis, friction coefficient analysis, interface damage analysis and fatigue fracture based on micromotor tribology for the interfaces of fastened connection structures to provide comprehensive performance evaluation for the project.
Provide technical iterative solutions for structural design: Through performance evaluation, failure modes and potential risks of connected structures can be identified, and improvement measures and solutions can be provided. These improvements and solutions can be used in the technical iterations of structural design to continuously improve the service performance and reliability of connected structures to meet changing engineering requirements.
Solving uncertainty in tightening methods for specific materials and structures: For specific materials and structures, engineers may be faced with uncertainty about how to select the appropriate preload or tightening torque, tightening method, and degree of tightening. This can lead to unreliable connections and safety hazards.
