The invention relates to a multi-load and multi-physics coupling material micromechanical performance in-situ testing instrument. Based on a driving/transmission unit and a mechanical-electrical-thermal-magnetic multi-physics coupling loading unit, the material micromechanical performance test under the stretch/compression-low cycle fatigue-torsion-bend-indentation multi-load mode and the mechanical-electrical-thermal-magnetic multi-physics coupling condition can be achieved by combining detecting and control units and algorithm routines. A mechanical body frame is integrated with a high-depth-of-field 3D microscopic imaging module and an ultrasonic flaw detecting element, so that the instrument can dynamically monitor the deformation damage mechanism, microstructure variation and performance evolvement rule of the material under the complex mechanical load and multi-physics coupling effect. The true working condition of the workpiece material can be more truly simulated through the combination of the multi-load loading and the multi-physics coupling loading, so that effective means and methods are provided for testing the micromechanical performance of the material close to the serve condition.

Multi-load and multi-physics coupling material micromechanical performance in-situ testing instrument

The invention relates to an in-situ testing machine for the microcosmic performance for a multi-load and multi-physical-field coupling material, belonging to the technical field of material mechanics property testing. The in-situ testing machine comprises a micro/nanometer-precision driving/transmission module, a 'mechanical-electric-thermal-magnetic' loading module and a control module, is integrated with a high-field-depth 3D (three dimensional) micro-imaging lens, a Raman spectrometer and a visual in-situ monitoring module and is capable of dynamically monitoring deformational behaviors, damage mechanisms and performance evolvement rules of the material in a loading process. The in-situ testing machine has the advantages that the whole structure is compact, and the space layout is saved; the loads of four manners including 'stretching/compression-torsion-bending-indentation' can be singly loaded, two or more loads can be combined to be loaded as well, and externally-applied physical fields such as heat, electricity, magnetism and the like can be combined to maximally simulate the real working conditions of components of the material, and effective measures and methods are provided for testing the micromechanical performance of the material under a service-approximating condition.

In-situ testing machine for microcosmic performance of multi-load and multi-physical-field coupling material

The utility model relates to an in-situ pull/press-torsion combined load material micromechanics test platform and belongs to the field of material mechanics tests The in-situ pull/press-torsion combined load material micromechanics test platform consists of a base, a precise loading unit, a detection control unit and a clamping and connecting unit, wherein the precise loading unit comprises a torque loading unit and a pull-press loading unit, and can be used for realizing the independent and combined loading of pull-press loads and torque loads; aiming at the pull-press loads and the torque loads, and the detection control unit is used for performing load detection by a pull/press force sensor and a torque sensor respectively and is combined with a contact-type capacitance displacement sensor, a circular grating ruler and a photoelectric encoder to monitor and control a loading mechanism The in-situ pull/press-torsion combined load material micromechanics test platform is compact in structure, small in size and controllable in strain rate, and can be used for performing in-situ monitoring on microstructure changes, deformation damage mechanisms and performance evolution laws of a material under the action of the combined load, so that an effective test method for revealing the micro-nano mechanics characteristics and damage mechanisms of materials under an approximate service condition is provided

In-situ pull/press-torsion combined load material micromechanics test platform

The invention relates to a mechanical testing platform for in-situ tension/compression materials under a scanning electronic microscope based on quasi-static loading, which belongs to machinery and electronic products. The testing platform can realize 'ultra-low-speed quasi-static' tension/compression mode loading, load/displacement signal synchronous acquisition and precision closed-loop control, and further can be compatibly used with HitachiTM-1000 type scanning electron microscopes and various imaging instruments with cavities and objective table structures. The mechanical testing platform consists of a precision driving unit, a precision transmission unit, a load/displacement signal detection and control unit and a clamping and connecting unit. Besides, the mechanical testing platform is small in volume, compact in structure and controllable in strain rate, and has excellent structural compatibility, vacuum compatibility and electromagnetic compatibility with imaging instruments such as various mainstream scanning electron microscopes, atomic force microscopes, Raman spectrometers, X-ray diffraction instruments, optical microscopes and the like.

Mechanical testing platform for in-situ tension/compression materials under scanning electronic microscope based on quasi-static loading

A headrest system comprises a headrest (16, 17), a bracket to which the headrest (11) is mounted and an actuator (12). The actuator (12) is configured to displace at least a portion (17) of the headrest (16, 17) relative to the bracket in a displacement direction (19) which is transverse to a longitudinal member of the bracket. The actuator (12) comprises a spindle transmission (22, 23) and a power drive coupled to the spindle transmission (22, 23). The spindle transmission (22, 23) comprises a spindle (22) and a spindle nut (23) engaged with the spindle (22). The power drive is arranged in a cavity (19) defined within an outer shell of the headrest (16, 17).

Headrest system and method of adjusting a headrest

Cross-scale micro nanometer grade in-situ composite load mechanical property testing platform

The invention relates to an in-situ high-frequency fatigue material mechanical test platform under a scanning electron microscope based on a stretching/compressing mode and belongs to the field of machinery and electronics. The test platform comprises a precise loading unit, a precise motion conversion unit, a load/displacement signal acquisition and control unit, a high-frequency driving unit and a test piece clamping and connecting unit. The test platform provided by the invention has the advantages that the structure is compact, the test precision is high, the strain rate and the test frequency are controllable, an in-situ high-frequency test based on the stretching/compressing mode can be performed on a three-dimensional test piece aiming at centimeter-scale or above in characteristicdimension under the condition of observation of various imaging instruments, the on-line monitoring can be carried out on the microcosmic deformation, damage and breaking process of a material under a fatigue stress, and a novel test method for revealing microcosmic deformation behaviors and a damage system of the material is provided.

In-situ high-frequency fatigue material mechanical test platform under scanning electron microscope based on stretching/compressing mode

Stretching, compression and bending combined load mode material mechanics performance test device under microscope

The invention relates to an in situ nanomechanical test and discloses a trans-scale micro-nano scale in situ tension compression mechanical property test platform which can be provided for an in situ tension/compression test and synchronous detection and synthesis of load/displacement signals. The platform is characterized in that: the platform comprises an accurate drive unit, a signal detection and control unit, three freedom degree manual adjustment unit, a clamp and a support unit. A direct current servomotor of the accurate drive unit is connected with a two-stage turbine worm mechanism through a coupling. The signal detection and control unit comprises a displacement sensor, a force transducer and an encoder forming a fixed connection with the current servomotor. The three freedom degree manual adjustment unit comprises a Y-direction manual adjustment knob connected with a lower layer main body base of a X-Y manual platform, a X-direction manual adjustment knob connected with an upper layer main body base of the X-Y manual platform and a Z-direction manual adjustment screw connected with a Z-direction adjustment lower wedge-shaped block, wherein the Z-direction adjustment lower wedge-shaped block forms a sliding match with a Z-direction adjustment upper wedge-shaped block.

Hu Huang

Papers

Cross-scale micro nanometer grade in-situ composite load mechanical property testing platform

Mechanical testing platform for in-situ tension/compression materials under scanning electronic microscope based on quasi-static loading

In-situ high-frequency fatigue material mechanical test platform under scanning electron microscope based on stretching/compressing mode

Stretching, compression and bending combined load mode material mechanics performance test device under microscope

Trans-scale micro-nano scale in situ tension compression mechanical property test platform