An apparatus for thermal ablation testing is provided. The apparatus comprises: a chamber; an optically transparent window in the chamber; a sample holder inside the chamber; a test sample in the sample holder; a number of bare-wire thermocouples connected to the test sample, wherein the thermocouples generate temperature data in the form of voltage; a mass balance inside the chamber, wherein the mass balance is configured to hold the sample holder and dynamically detect changes in mass of the test sample; an external radiant heat source configured to heat the test sample through the window; and a pyrometer directed at the test sample.

A method for determining the tensile strength of a rock sample comprising the steps of obtaining the rock sample, measuring a water content of the rock sample through a water measurement method, determining a matrix bulk modulus of the rock sample, wherein the matrix bulk modulus is determined through a matrix modulus method, heating the rock sample with electromagnetic energy such that the electromagnetic energy heats the water content in the rock sample from an initial temperature, wherein heating the water content causes a pore-water pressure of the rock sample to increase, detecting a break in the rock sample with a sensor, wherein the increase in the pore-water pressure causes the rock sample to break, wherein the break occurs at a break time, at a break temperature; and calculating the pore-water pressure through the water content, the matrix bulk modulus, and the break temperature of the water content.

Evaluating structural capability of materials under axisymmetric thermomechanical loading includes placing a test material between an upper fixture and a lower fixture. A plurality of bolts arranged around the upper fixture and the lower fixture. The plurality of bolts are configured to apply a preload around the circumference of the upper fixture and the lower fixture. The upper fixture and the lower fixture includes an opening facilitating a heat load to be applied to the test material.

There is described a system for characterizing a physical property of a sample. The system generally has a microelectromechanical system (MEMS) device having a framework, a shuttle member extending along a longitudinal orientation within the framework, a shuttle actuator having obliquely extending arms extending between the framework and the shuttle member, the shuttle actuator configured for expanding the arms upon application of electricity thereacross, said expanding applying a force onto the shuttle member and moving the shuttle member at least partly in the longitudinal orientation, and a socket positioned adjacent a tip of the shuttle member; and a MEMS chip receiving the sample and being configured for insertion into the socket, whereby, when the MEMS chip is received in the socket and loaded with the sample, the force applied onto the shuttle member is transferred into stress internal to the MEMS chip via the tip of the shuttle member.

A fire testing device for testing fire-resistance properties of a test subject includes a cavity, a heat source adapted to heat the cavity, and a removable separation plate configured to subdivide the cavity into a first chamber and a second chamber. The heat source is arranged in the first changer and adapted to preheat the first chamber. The second chamber includes an opening adapted to receive the test subject. A fire-resistance test of the test subject may include activating the removable separation plate to subdivide the cavity into the first chamber and the second chamber, arranging the test subject at an opening of the second chamber, preheating the first chamber to a defined temperature using the heat source, deactivating the removable separation plate to provide an undivided cavity, and sustaining a heat supply to the cavity using the heat source.

A method of laser bond inspection is provided. The method includes applying a thermochromatic energy-absorbing material to an inspection site of a test article. The method includes delivering a first amount of energy to the inspection site using a laser. The first amount of energy generates stresses in the test article. The method includes absorbing the first amount of energy into the thermochromatic energy-absorbing material to produce an observable thermal response that correlates to the first amount of energy.

A crack evaluation method of an additively manufactured object, which is a method evaluating a crack sensitivity of an additively manufactured object, includes the following. A crack evaluation device is additively manufactured using a raw material powder. The crack evaluation device includes: a body part, a base part opposed to the body part, a connecting part connecting one end side of the body part and the base part, a stress concentration part connecting another end side of the body part and the base part, and a comb tooth part connecting, by comb teeth, the body part and the base part between the connecting part and the stress concentration part. The crack sensitivity is evaluated based on cracked comb teeth at the crack evaluation device serving as the additively manufactured object.

The present invention includes the following steps: setting the thickness of an interposer to an initial value; determining the axial force of the interposer and the radius of curvature of the warpage caused by the difference in the thermal expansion coefficients of the supporting substrate, the joined layer and the interposer at the set thickness; determining the absolute value of the stress on the chip-connecting surface of the interposer from the stress due to the axial force of the interposer and the stress due to the warpage using the determined axial force and the radius of curvature; determining whether or not the absolute value of the stress is within a tolerance; changing the thickness of the interposer by a predetermined value; and confirming the set thickness as the thickness of the interposer when the determined absolute value of the stress is within the tolerance.

A method is provided for determining the thermal expansion of a low thermal expansion material with very high accuracy of at most +/3 ppb/K or less and/or with a reproducibility of at most +/1 ppb/K or less. A measuring device is also provided that includes an advanced push rod dilatometer.

A test fixture is provided for containing a pair of test samples (i.e., sample pair) that contact each other along an interface. The fixture receives exposure to laser emission for radiative heating while providing compression to the sample pair. The text fixture includes a housing, an isolation container, and a compressor. The housing has an axial cavity with annular cross-sections including an internal helical thread portion and a window for receiving the laser emission. The isolation container receives the sample pair. The container inserts into the axial cavity and including an opening for disposition adjacent to the window. The compressor has circular cross-sections for insertion into the axial cavity and includes an external helical thread portion for engaging the internal helical thread portion of the housing. Axial pressure applies to the isolation container by turning the compressor inside the axial cavity. The isolation container provides thermal insulation from the housing and the compressor. In additional embodiments, the isolation container comprises a cup with the opening to isolate the sample pair from the housing, and a washer to isolate the sample pair from the compressor.