A defect detection device 10 is provided with: a laser light source 11 for irradiating laser light to a measurement region R of a surface of an inspection object S; a laser light source control unit 15 for controlling the laser light source so as to cause laser light to be outputted continuously or quasi-continuously for a time longer than a period of vibration generated in the inspection object; an interferometer (speckle shearing interferometer 14) for generating interference light in which reflected light of the laser light reflected in the measurement region and reference laser light emitted from the laser light source 11 interfere; a detector (image sensor 145) for detecting the intensity of the interference light for each point in the measurement region R; a phase shifter 143 for shifting the phase of the reflected laser light or the reference laser light; an integrated intensity pattern determination unit 16 for obtaining an integrated intensity obtained by integrating the intensity for each point over an integration time longer the period of the vibration in three or more phases, the phase being shifted by the phase shifter 143 into three or more different phases; an interference degree distribution generation unit 17 for obtaining the distribution of the degree of interference based on the integrated intensity obtained in each of the three or more phases for each point; and a defect detection unit 18 for detecting a defect in the measurement region R based on the distribution of the degree of interference in the measurement region R.

The present disclosure discloses an observable micro-nano mechanical testing apparatus and method. The apparatus includes a supporting component, a driving component, a bearing component and an imaging component. The driving component and the imaging component are respectively vertically arranged on the supporting component, the bearing component is horizontally arranged on the supporting component and positioned below the driving component and the imaging component, the bearing component is used for bearing a sample and moving the sample, the driving component is used for driving an indenter to apply loads on the sample so as to form an indentation on the sample, and the imaging component is used for observing and analyzing the indentation on the sample. Based on the testing method conducted by the testing apparatus in the present disclosure, mechanical property parameters of materials can be effectively measured; the structure is simple; and accuracy of measurement results is high.

A system and a method for measuring drilling damage in fiber reinforced plastic (FRP) composites is described. Multiple holes are drilled in the FRP composite using a drill having nominal diameter, and the FRP composite is separated into multiple drilled blocks. Each block, covered with the black substrate, is scanned on a scanner to generate a scanned image depicting a hole region, a background, and delamination damage peaks. For each scanned image, a maximum delamination damage peak and a maximum diameter of a first circle concentric with the drilled hole and passing through tip of the maximum delamination peak, are measured. Further, a delamination size and a delamination factor are calculated based on the maximum diameter of the first circle and the nominal diameter of the drill.

To provide a fracture-visualization sensor capable of visualizing the fracture behavior of a composite material and a composite-material fracture-visualization system using the fracture-visualization sensor. A first luminescent film including a mechanoluminescent material is provided on one surface of a composite material. The first luminescent film has a maximum stress per unit of cross-sectional area within the range of 19-43 N/mm.sup.2.

A stress analysis device includes: an imaging element that obtains temperature images over a same time range for a same region of an object; a feature point extractor that extracts a feature point in each of the temperature images; a projection transformer that performs projective transformation on each of the temperature images to align the feature point in the temperature images, and aligns the temperature images with respect to a temperature image being a reference; a pixel rearranger that rearranges a pixel array of each of the temperature images subjected to the projective transformation with respect to a pixel array of the temperature image that is the reference; a stress converter that obtains a stress image by multiplying each of the temperature images after pixel rearrangement by a stress conversion coefficient; and an additional averaging part that obtains an additional averaging stress image by adding and averaging the stress images.

A linear and rotary shock-testing machine including: a base; a shaft rotatably and translationally movable relative to the base; a test disc for holding one or more specimens to be tested, the test disc being rotatable with the shaft; one of a cam and cam follower fixed relative to the base; and an other of the cam and cam follower fixed to the test disc, wherein the shaft being driven to provide a rotational shock to the one or more test specimens; and the cam is shaped such that the cam follower follows the cam to urge the test disc into a translational motion while rotating to provide translational shock to the one or more specimens.

A testing apparatus for a flexible screen includes a slide rail, a reel, and a clamping member. The reel is disposed at an end of the slide rail in the extension direction of the slide rail which the axial direction of the reel is perpendicular to. The reel has a hollow structure and is connected to a evacuating device through a gas path formed in the hollow structure to enable the evacuating device to vacuumize inside of the reel to fit the flexible screen and coil around the reel. The reel is configured to affix first end of flexible screen and rotate to coil the flexible screen. The clamping member is configured to clamp a second end of the flexible screen opposite to the first end. The reel is further configured to rotate to drive, through the flexible screen, the reel and the clamping member to slide towards each other along the slide rail.

Provide is a deformation testing apparatus in which a sign of breakage of a specimen under a deformation test can be detected before an actual breakage. The deformation testing apparatus carrying out a plurality of deformation cycles includes an image capturing means; reference data storing means storing the reference data showing the deformation state calculated based on the reference image data shot by the image capturing means; reference cycle number deformation data calculating means to calculate the reference data; detection cycle number deformation data calculating means to calculate detection cycle number deformation data showing the deformation state based on the detection image data shot at the detection cycle number being larger than the reference cycle number; and change detection means to detect that the deformation caused in the specimen is changed based on the reference cycle number deformation data and the detection cycle number deformation data.

The present disclosure describes systems and methods for conducting deformation (e.g., extension and/or strain) measurements based on characteristics of a test specimen using light sourced from a single side of a test specimen. The light source and an imaging device are arranged on a single side of the test specimen relative to a back screen while the light source illuminates both a front surface of the test specimen and the back screen. The back screen reflects light to create a silhouette of the test specimen. The imaging device captures images of one or more markers on a front surface of the test specimen, as well as measuring position of the markers during the testing process. The imaging device also measures relative changes in position of the edges of the test specimen during the testing process, by analyzing the edges of the silhouetted image created by the reflective back screen.

A method for searching for statistics correlated with a strength of a pillar-shaped honeycomb formed body after firing having predetermined design specifications including a step of measuring two or more parameters for 90% or more of the polygonal cells excluding partial cells at the outermost periphery, and calculating two or more statistics for each parameter measured; a step of firing each of the plurality of pillar-shaped honeycomb formed bodies before firing under predetermined conditions to prepare a plurality of pillar-shaped honeycomb formed bodies after firing; a step of evaluating a correlation between the two or more statistics and the strength of the plurality of pillar-shaped honeycomb formed bodies after firing; and a step of determining a statistic having the highest correlation with the strength of the pillar-shaped honeycomb formed bodies after firing having the predetermined design specifications from among the two or more statistics.