The superficial cartilage zone expanded less than the radial zone. ʅ9�D������ۺ^���M�1�i��Q�Z� sӍ��%b^}����$�V�K���aq}/,�e��I�� �$ Copyright © 2020 Elsevier B.V. or its licensors or contributors. The zonal differences in expansion were attributed to the known zonal differences in the fibrillar collagen architecture and proteoglycan concentration. x�B��h���9���l��S�g���(>�K(���ܓ^��������i-?-UKL�G-�9���y"L��j%*[8h}���E)9�lf� Poisson's ratio for the articular cartilage. Alphabetical. The expression for the determination of Poisson's ratio for rubber is. However, the microscopic techniques revealed that the lateral expansion, especially during the initial phase of relaxation, was inhomogeneous through the tissue depth. Theromophysical Data. g\�uj�4+ȁ�:Kg��"��ㇺ�x<7w�?ԞʂB)l��k��B�n��5�/�n�TGc> jJZ��~�c�k: In this study, we introduce a method for determining Poisson™s ratio and Young™s modulus of soft materials in indentation using different sized Poisson's ratio for rubber is nearly 0,5, however for cork close to 0. N'q����)��O(BM���?-����2&(��&]�� �JO�a�f� j8A��|1��r>I��*��3�,v���֟a��^5n�s�7��{. Natural Rubber, NR: 0.50 (1) Average experimentel values measured at 25 °C. Another way to prevent getting this page in the future is to use Privacy Pass. In addition to optical analyses, the equilibrium behavior of cartilage disks in unconfined and confined ramp-stress relaxation tests provided a direct estimation of the aggregate modulus, Ha, and Young's modulus and, indirectly. The Poisson ratio is the ratio of the radius of curvature in the Precise determination of the Poisson ratio in soft materials with 2D digital image correlation Robyn H. Pritchard, Pascal Lava, Dimitri Debruyne, Eugene M. Terentjev Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, U.K. Typical Performance. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. Experimental Determination of the Poisson's Ratio and the Elastic Modulus of a Sand-Plastic Composite Material June 2017 International Journal of Engineering Research 6(6):292-297 Cloudflare Ray ID: 5f18325e0f9e4951 We use cookies to help provide and enhance our service and tailor content and ads. Copyright © 1997 Published by Elsevier Ltd. https://doi.org/10.1016/S0021-9290(96)00133-9. You may need to download version 2.0 now from the Chrome Web Store. }I�ՇD)Fٞc�H*u�ŅF�>5��&�@s4�P�R����>(�2��*�Qׅ�ܘ����0�e��y�R~X�Kf�ܤS5\N9��h�3aj�,8��J��F�[���ǥv�h=���2���C��Ϝ��q��S�i(R���0܋��6��m����o!�S���P�`β�,m�&-u�>F�E�� A. 1 0 obj << /Type /Page /Parent 9 0 R /Resources 2 0 R /Contents 3 0 R /MediaBox [ 0 0 612 792 ] /CropBox [ 0 0 612 792 ] /Rotate 0 >> endobj 2 0 obj << /ProcSet [ /PDF /Text ] /Font << /F1 17 0 R /F2 27 0 R /F3 41 0 R /TT2 16 0 R /TT4 31 0 R /TT5 36 0 R /TT7 4 0 R >> /ExtGState << /GS1 46 0 R >> /ColorSpace << /Cs5 18 0 R >> >> endobj 3 0 obj << /Length 15213 /Filter /FlateDecode >> stream The equilibrium stiffness of articular cartilage is controlled by flow-independent elastie properties (Young's modulus, Es, and Poisson's ratio, vs) of the hydrated tissue matrix. DETERMINATION OF POISSON’S RATIO BY MEANS OF RESONANT COLUMN TESTS. • Firmly press the transducers on either side of the 25 µs calibration rod (Part No 710 10 028). Polymers Index. Put a small amount of shear wave coupling gel on the transducers. Required steps before measurements can be performed: 1. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. ���ޛ�k^�1~6m�h�m��̏?�fC[[�����I����º���naCh\��Gۄp����C�*5]�Al[�x�v�v Poisson's Ratios. Properties of commercial commodity H��W�n�y�Wt.fs8��� ��>�ȑ� MiE�Z�3�ũ�S=�2�%�aW׭��NU�Z�xe�5��E�XgZ��95�3>7�mi�����C4�p��^���5W�Ųm�68�Z/藍ɬ?V�m�yS����k���]��i5�ai���T���66���X��\�� Polymer Properties Database. %PDF-1.4 %���� The similar vs-values obtained with optical and mechanical techniques imply that, at equilibrium, for these two tests, the isotropic model is acceptable for mechanical analysis. Key data on over two hundred and fifty polymers. ... raising up to 0,5 for post-yield deformation. By continuing you agree to the use of cookies. The depthaveraged Poisson's ratio for the complete hyaline articular cartilage layer (without the calcified zone), determined from the equilibrium response, was 0.185 0165 (mean S.D., n = 9), For the disks measured initially at a diameter of 3.7 min and then after coring to 1.8 min diameter, Poisson ratio values were 0.131 0.062 and 0.064, respectively (mean S.D,, n = 3). In the current study, an optical (microscopic) method has been developed for the visualization of the boundaries of cylindrical bovine humeral head articular cartilage disks (n = 9), immersed in physiological solution, and compressed in unconfined geometry. This method allowed a direct, model-independent estimation of Poisson's ratio of the tissue at equilibrium, as well as characterization of the shape changes of the sample during the nonequilibrium dynamic phase. There are some substances with negative Poisson's ratio; when they are stretched in one course, whereas they become thicker in perpendicular. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. Optical and mechanical determination of poisson's ratio of adult bovine humeral articular cartilage. 2. }��"6ѯ�KQ���K��k�Xݩ��Z �Uм��~?��u$��Re�z8�m�UtoW����Q0��a} /��A8�W�xq���̣#����>�i,�P�Ç��c���]��G���-q��i�z�b�rS�C�%������ȡ�`sL��%����tI�2�����yN:ўP�Ħ��� Your IP: 207.244.250.48 If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices.

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