Sylvatest is an ultrasonic measuring device that provides an overall diagnosis of a wooden component to test its mechanical strength. This is a specific non-destructive testing tool for wooden beams.
Sylvatest is an ultrasonic measuring device that provides an overall diagnosis of a wooden component to test its mechanical strength. This is a specific non-destructive testing tool for wooden beams.
Sylvatest is an acousto-ultrasonic measuring device that provides an overall diagnosis of the wood element, based on the speed and energy absorption of the transmitted ultrasonic wave. [1] [2] [3] The result given reflects the residual health of the wood in the trunk of the tree tested or the beam measured. These are non-destructive tests. [4] [5]
The technology was developed by Professor Jean-Luc Sandoz as part of his thesis at EPFL in 1984 and was further developed by researcher Yann Benoit in 1998. [4] [6]
The sylvatest is used in many countries (Brazil, Europe and Asia). [4] [7] [8] [9] [10]
It has been used on historic buildings such as the Entrepôts des magasins généraux in Paris, the Forbidden City in Beijing, and the beams of Notre-Dame de Paris [11] [12] or even the Château de Valère. [13]
It is also used to certify the quality of wood for registered designations of origin such as Bois des Alpes [14] [15] or Bois de Chatreuse. [16] [17]
Young's modulus is a mechanical property of solid materials that measures the tensile or compressive stiffness when the force is applied lengthwise. It is the modulus of elasticity for tension or axial compression. Young's modulus is defined as the ratio of the stress applied to the object and the resulting axial strain in the linear elastic region of the material.
Nondestructive testing (NDT) is any of a wide group of analysis techniques used in science and technology industry to evaluate the properties of a material, component or system without causing damage. The terms nondestructive examination (NDE), nondestructive inspection (NDI), and nondestructive evaluation (NDE) are also commonly used to describe this technology. Because NDT does not permanently alter the article being inspected, it is a highly valuable technique that can save both money and time in product evaluation, troubleshooting, and research. The six most frequently used NDT methods are eddy-current, magnetic-particle, liquid penetrant, radiographic, ultrasonic, and visual testing. NDT is commonly used in forensic engineering, mechanical engineering, petroleum engineering, electrical engineering, civil engineering, systems engineering, aeronautical engineering, medicine, and art. Innovations in the field of nondestructive testing have had a profound impact on medical imaging, including on echocardiography, medical ultrasonography, and digital radiography.
Elastography is any of a class of medical imaging modalities that map the elastic properties and stiffness of soft tissue. The main idea is that whether the tissue is hard or soft will give diagnostic information about the presence or status of disease. For example, cancerous tumours will often be harder than the surrounding tissue, and diseased livers are stiffer than healthy ones.
The Chartreuse Mountains are a mountain range in southeastern France, stretching from the city of Grenoble in the south to the Lac du Bourget in the north. They are part of the French Prealps, which continue as the Bauges to the north and the Vercors to the south.
Claude-Louis Navier was a French mechanical engineer, affiliated with the French government, and a physicist who specialized in continuum mechanics.
In materials science, shear modulus or modulus of rigidity, denoted by G, or sometimes S or μ, is a measure of the elastic shear stiffness of a material and is defined as the ratio of shear stress to the shear strain:
Ultrasonic testing (UT) is a family of non-destructive testing techniques based on the propagation of ultrasonic waves in the object or material tested. In most common UT applications, very short ultrasonic pulse waves with centre frequencies ranging from 0.1-15 MHz and occasionally up to 50 MHz, are transmitted into materials to detect internal flaws or to characterize materials. A common example is ultrasonic thickness measurement, which tests the thickness of the test object, for example, to monitor pipework corrosion and erosion. Ultrasonic testing is extensively used to detect flaws in welds.
The Valère Basilica, also called Valère castle, is a fortified Roman Catholic church situated in Sion in the canton of Valais in Switzerland. It is located on a hill and faces the Château de Tourbillon, situated on the opposite hill. It is a Swiss heritage site of national significance.
The impulse excitation technique (IET) is a non-destructive material characterization technique to determine the elastic properties and internal friction of a material of interest. It measures the resonant frequencies in order to calculate the Young's modulus, shear modulus, Poisson's ratio and internal friction of predefined shapes like rectangular bars, cylindrical rods and disc shaped samples. The measurements can be performed at room temperature or at elevated temperatures under different atmospheres.
Saint-Nicolas-de-Macherin is a commune in the Isère department within Auvergne-Rhône-Alpes in southeastern France. The area of the commune is 1,060 hectares and the altitude lies between 447 and 952 meters.
Mathias Fink, born in 1945 in Grenoble, is a French physicist, professor at ESPCI Paris and member of the French Academy of Sciences.
Dominique Gauzin-Müller is a French architect and architectural critic, focusing on wood and sustainability in architecture and urbanism. She is the author of several books on these subjects, which have been translated into several languages. She wrote Construire avec le Bois (1999), L'architecture écologique (2001), 25 maisons en bois (2003) and 25 maisons écologique (2005).
The Trade Unions International of Building, Wood, Building Materials and Industries, also known as the Trade Unions International of Construction, Wood, Building Materials and Industries, or by its French acronym UITBB is a Trade Union International affiliated with the World Federation of Trade Unions.
An ultrasonic pulse velocity test is an in-situ, nondestructive test to check the quality of concrete and natural rocks. In this test, the strength and quality of concrete or rock is assessed by measuring the velocity of an ultrasonic pulse passing through a concrete structure or natural rock formation.
Acoustic or stress wave tomography is a non-destructive measurement method for the visualization of the structural integrity of a solid object. It is being used to test the preservation of wood or concrete, for example. The term acoustic tomography refers to the perceptible sounds that are caused by the mechanical impulses used for measuring. The term stress wave tomography describes the measurement method more accurately.
Jean-Luc Sandoz is a French-Swiss engineer and an expert in wood construction. He is the founder of several companies in the field of engineering, industrialization, construction and expertise, all related to wood. Formerly, he was a professor and lecturer at EPFL.
École supérieure du bois (ESB) a French engineering College created in 1934.
Laszlo Adler is an American physicist and a Taine McDougal Professor Emeritus in the Department of Integrated Systems Engineering at the Ohio State University. He is known for his work in Ultrasonics, Acousto-optics, and Nondestructive Evaluation of Materials. He is a holocaust survivor and has been active in scientific research for over 60 years.
Polux is a measuring device for checking the condition of wooden electricity and telephone poles. This is a specific non-destructive testing tool for wooden poles.
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