Relevant bibliographies by topics / Iwand

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Iwand'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "Iwand"

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Göll, Hans-Peter. "Iwand-Nachlaß Und Iwand-Studien." Verkündigung und Forschung 34, no. 1 (March 1, 1989): 52–61. http://dx.doi.org/10.14315/vf-1989-0105.

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Moltmann, Jürgen. "Hans Joachim Iwand entdecken." Evangelische Theologie 60, no. 3 (May 1, 2000): 230–36. http://dx.doi.org/10.14315/evth-2000-0308.

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Sauter, Gerhard. "Theologisches Feuer." Evangelische Theologie 60, no. 3 (May 1, 2000): 177–91. http://dx.doi.org/10.14315/evth-2000-0305.

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Zusammenfassung Hans Joachim Iwand hat für die Versöhnung des deutschen Volkes mit seinen östlichen Nachbarn und zur Erneuerung des Verhältnisses von Christen und Juden entscheidende Anstöße gegeben. Durch die Art und Weise, in der er dies tat, hat er oft auch Anstoß erregt.Wie hängt dies mit seiner Persönlichkeit, seiner theologischen Existenz, seinen Lebensumständen, seiner theologischen Forschung und Lehre zusammen?In einer theologischen Porträtskizze werden Iwands Auffassung von Schulderkenntnis, Umkehr und Umdenken, seine theologische Verantwortung der Predigt, in der Gottes Verheißung vernehmbar wird, und seine Erkenntnis christlicher Freiheit umrissen. Bedacht werden auch Iwands Beiträge zum Verständnis der reformatorischen Rechtfertigungslehre in unserer Zeit, zur Beziehung von Christentum und Kultur und zum theologischen Verständnis des Menschen im Verhältnis zum philosophischen Menschenbild.
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Hoffmann, Martin. "Hans Joachim Iwands Impulse zu einer christlichen Gesellschaftsethik." Zeitschrift für Evangelische Ethik 41, no. 1 (February 1, 1997): 203–16. http://dx.doi.org/10.14315/zee-1997-0127.

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Abstract After Second World War Hans Joachim Iwand (1899- 1960) reacts upon the experiences during the time of Nazi-Germany with a conception, which deals in a new way with the questions of political ethics. In this conception Iwand criticized the bipolar and traditional pattem of »State and Church« and explores »Society« as a selfcontained and autonomaus theme for political ethics. It is remarkable to see, how lwands approach to »theologia crucis« and the notions of the term »consciene« are now transformed in an pneumaticological way, that opens the ethic for a conception of public responsibility
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Hertog, Gerard den. "An den Frieden glauben!? Die Entstehung von Iwands Friedenstheologie aus seiner Seelsorge in der Not und der Anfechtung der ersten Nachkriegsjahre." Evangelische Theologie 78, no. 4 (August 1, 2018): 280–97. http://dx.doi.org/10.14315/evth-2018-780406.

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AbstractIn the first years after the end of World War II, Hans Joachim Iwand (1899-1960) was inten­sely engaged for repentance and a radical farewell to the wanderings of the Third Reich in church, society and the political realm. This article traces how he, in doing so, elaborated a genuine theology of peace while practicing pastoral care to refugees from East Prussia. Iwand experienced the antithesis between East and West, resulting in a gradual development of the »Cold War«, as a temptation originating from the continuation of the dualistic worldview of Nazi-ideology. His theological approach is characterized by advancing the question of who and where God is, thus rethinking and renewing Luther’s theology of the cross.
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Seim, Jürgen. "Hans Joachim Iwand und die vertriebenen Ostpreußen." Kirchliche Zeitgeschichte 25, no. 1 (December 2012): 24–34. http://dx.doi.org/10.13109/kize.2012.25.1.24.

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Assel, Heinrich. "Hans Joachim Iwand, Nachgelassene Werke Neue Folge." Verkündigung und Forschung 46, no. 2 (March 1, 2001): 72–89. http://dx.doi.org/10.14315/vf-2001-0213.

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Seim, Jürgen. "Friedrich Wilhelm Graf über Hans Joachim Iwand." Evangelische Theologie 62, no. 6 (December 1, 2002): 473–75. http://dx.doi.org/10.14315/evth-2002-0608.

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Heinrich, Rolf. "Hans Joachim Iwand – Prediger zwischen den Zeiten." Evangelische Theologie 66, no. 1 (January 1, 2006): 50–57. http://dx.doi.org/10.14315/evth-2006-0107.

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Seim, Jürgen. "Die Lehre von Evangelium und Gesetz bei Hans J. Iwand." Evangelische Theologie 46, no. 3 (May 1, 1986): 231–46. http://dx.doi.org/10.14315/evth-1986-0303.

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Dissertations / Theses on the topic "Iwand"

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Schwarz, Norbert. ""denn wenn ich schwach bin, bin ich stark" : Rezeptivität und Produktivität des Glaubenssubjektes in der Homiletik Hans Joachim Iwands /." Göttingen : Vandenhoeck & Ruprecht, 2007. http://opac.nebis.ch/cgi-bin/showAbstract.pl?u20=9783525624067.

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Vollmer, Reinhard. "Gott Recht geben - im Gebet : zur anthropologischen Bedeutung der Rechtfertigungslehre bei Rudolf Hermann und Hans Joachim Iwand." Bad Salzuflen MBK-Verl, 2006. http://deposit.ddb.de/cgi-bin/dokserv?id=2807870&prov=M&dokv̲ar=1&doke̲xt=htm.

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Vollmer, Reinhard. "Gott Recht geben - im Gebet zur anthropologischen Bedeutung der Rechtfertigungslehre bei Rudolf Hermann und Hans Joachim Iwand." Bad Salzuflen MBK-Verl, 2004. http://deposit.ddb.de/cgi-bin/dokserv?id=2807870&prov=M&dok_var=1&dok_ext=htm.

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Schwarz, Norbert. ""Denn wenn ich schwach bin, bin ich stark" Rezeptivität und Produktivität des Glaubenssubjektes in der Homiletik Hans Joachim Iwands." Göttingen Vandenhoeck & Ruprecht, 2004. http://d-nb.info/989316564/04.

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Aach, Inge Luise M. "The contextuality and unity of the theology of Hans-Joachim Iwand, an introduction for North American Protestants." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq29864.pdf.

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Suh, Byung-Yong. "Lex spiritualis : Iwands Verständnis des Gebotes im Gespräch mit Luther, Calvin, Barth /." Seoul : Handl, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=015023475&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Zinnecker-Rönchen, Astrid. "Geschenkte Menschlichkeit : über die Bedeutung des Kreuzes Jesu Christi für das Verständnis christlicher Identität in feministischer Theologie, bei D. Korsch und bei H.J. Iwand /." Berlin : Lit, 2007. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=016234121&line_number=0002&func_code=DB_RECORDS&service_type=MEDIA.

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Baldauf, Katrin [Verfasser], Iwan [Akademischer Betreuer] Burgener, Iwan [Gutachter] Burgener, and Ingo [Gutachter] Dähnert. "Charakterisierung der Kardiomyopathien bei 106 Katzen mit diagnostizierter Myokarderkrankung / Katrin Baldauf ; Gutachter: Iwan Burgener, Ingo Dähnert ; Betreuer: Iwan Burgener." Leipzig : Universitätsbibliothek Leipzig, 2014. http://d-nb.info/123860143X/34.

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Dahlem, Dorothee [Verfasser], Iwan [Akademischer Betreuer] Burgener, Iwan [Gutachter] Burgener, and Ingo [Gutachter] Dähnert. "Kardiologische Untersuchung und Erhebung echokardiografischer Referenzwerte beim Golden Retriever / Dorothee Dahlem ; Gutachter: Iwan Burgener, Ingo Dähnert ; Betreuer: Iwan Burgener." Leipzig : Universitätsbibliothek Leipzig, 2014. http://d-nb.info/1239421796/34.

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Platen, Mitja [Verfasser], Iwan [Akademischer Betreuer] Schaap, and Kai [Akademischer Betreuer] Tittmann. "Characterizing the Structure and Mechanics of 2D Clathrin Lattices with Atomic Force Microscopy / Mitja Platen. Betreuer: Iwan Schaap. Gutachter: Iwan Schaap ; Kai Tittmann." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2015. http://d-nb.info/1078420092/34.

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Books on the topic "Iwand"

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Hans Joachim Iwand: Eine Biografie. Gütersloh: C. Kaiser/Gütersloher Verlagshaus, 1999.

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1899-1960, Iwand Hans Joachim, Eichholz Georg, and Held Heinrich 1897-1957, eds. Iwand-Studien: Aufsätze und Briefwechsel Hans Joachim Iwands mit Georg Eichholz und Heinrich Held. Köln: Rheinland-Verlag, 1999.

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Gesetz und Evangelium bei Hans Joachim Iwand. Göttingen: Vandenhoeck & Ruprecht, 1997.

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Meier, Ralph. Gesetz und Evangelium bei Hans Joachim Iwand. Göttingen: Vandenhoeck & Ruprecht, 1997. http://dx.doi.org/10.13109/9783666562877.

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Krüger, Ralf-Dieter. Versöhnt mit Gott: Rechtfertigung und Heiligung bei Hans Joachim Iwand. Aachen: Shaker, 1997.

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Krüger, Ralf-Dieter. Versöhnt mit Gott: Rechtfertigung und Heiligung bei Hans Joachim Iwand. Tübingen: Druckerei Bölk, 1993.

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Bezeugte Versöhnung: Die trinitarische Grundlegung der Ethik bei Hans Joachim Iwand. Essen: Verlag Die Blaue Eule, 1988.

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Politische Theologie und Theologie des Kreuzes: Werner Elert und Hans Joachim Iwand. Göttingen: Vandenhoeck & Ruprecht, 2010.

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Basse, Michael, and Gerard den Hertog, eds. Dietrich Bonhoeffer und Hans Joachim Iwand – Kritische Theologen im Dienst der Kirche. Göttingen: Vandenhoeck & Ruprecht, 2016. http://dx.doi.org/10.13109/9783666564529.

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Iwand, Hans Joachim. Om de eenheid van denken en leven: De stem van Hans Joachim Iwand. ʼs-Gravenhage: Boekencentrum, 1991.

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Book chapters on the topic "Iwand"

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Brinkmann, Gert Ulrich. "Iwand, Hans Joachim." In Theologen, 148. Stuttgart: J.B. Metzler, 2004. http://dx.doi.org/10.1007/978-3-476-02948-5_104.

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Walter, Gregory A. "Hans Joachim Iwand (1899–1960)." In Twentieth-Century Lutheran Theologians, 178–94. Göttingen: Vandenhoeck & Ruprecht, 2013. http://dx.doi.org/10.13109/9783666550454.178.

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Hertog, Gerard den. "Hans Joachim Iwand (1899 – 1960)." In Stiftsgeschichte(n), 267–76. Göttingen: Vandenhoeck & Ruprecht, 2015. http://dx.doi.org/10.13109/9783666570377.267.

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Veen, Wilken. "Bonhoeffer und Iwand zum Schuldbekenntnis und zur Umkehr. Ein Vergleich des Schuldbekenntnisses aus Bonhoeffers Ethik und Iwands Entwurf für das Darmstädter Wort." In Dietrich Bonhoeffer und Hans Joachim Iwand – Kritische Theologen im Dienst der Kirche, 235–66. Göttingen: Vandenhoeck & Ruprecht, 2016. http://dx.doi.org/10.13109/9783666564529.235.

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von Lüpke, Johannes. "Christologischer Realismus. Erkundungen zum Verständnis der Wirklichkeit bei Dietrich Bonhoeffer und Hans Joachim Iwand." In Dietrich Bonhoeffer und Hans Joachim Iwand – Kritische Theologen im Dienst der Kirche, 149–64. Göttingen: Vandenhoeck & Ruprecht, 2016. http://dx.doi.org/10.13109/9783666564529.149.

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Grözinger, Albrecht. "Hans Joachim Iwand als Homiletiker und Prediger in seinem geistesgeschichtlichen Kontext und darüber hinaus." In Predigten und Predigtlehre, edited by Albrecht Grözinger, Bertold Klappert, Rudolf Landau, and Jürgen Seim, 511–22. Gütersloh: Gütersloher Verlagshaus, 2019. http://dx.doi.org/10.14315/9783641247683-008.

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Hofheinz, Marco. "„Mein Freund ist Dr. Bonhoeffer gewesen“ – oder: „… dass an diesem Punkt bei uns etwas nicht stimmt“ Zur Wiederentdeckung des Widerstandsrechts im 20. Jahrhundert in der politischen Ethik Dietrich Bonhoeffers und Hans Joachim Iwands." In Dietrich Bonhoeffer und Hans Joachim Iwand – Kritische Theologen im Dienst der Kirche, 103–28. Göttingen: Vandenhoeck & Ruprecht, 2016. http://dx.doi.org/10.13109/9783666564529.103.

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Kern, Annette. "„Die fromme Gemeinschaft erlaubt es ja keinem, Sünder zu sein.“ Der Sündenbegriff in Hans Joachim Iwands Von der Gemeinschaft christlichen Lebens und Dietrich Bonhoeffers Beichte und Abendmahl." In Dietrich Bonhoeffer und Hans Joachim Iwand – Kritische Theologen im Dienst der Kirche, 129–48. Göttingen: Vandenhoeck & Ruprecht, 2016. http://dx.doi.org/10.13109/9783666564529.129.

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Neddens, Christian. "Hans Joachim Iwand und Dietrich Bonhoeffer als kritische Theologen im Dienst der Bekennenden Kirche. Eine biographische und zeitgeschichtliche Skizze." In Dietrich Bonhoeffer und Hans Joachim Iwand – Kritische Theologen im Dienst der Kirche, 13–38. Göttingen: Vandenhoeck & Ruprecht, 2016. http://dx.doi.org/10.13109/9783666564529.13.

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Smits, Cees-Jan. "„Gut genug dessen Risse zu decken“ Die Metapher des Lückenbüßers aus soteriologischer Perspektive bei Hans Joachim Iwand, Karl Barth und Dietrich Bonhoeffer." In Dietrich Bonhoeffer und Hans Joachim Iwand – Kritische Theologen im Dienst der Kirche, 165–88. Göttingen: Vandenhoeck & Ruprecht, 2016. http://dx.doi.org/10.13109/9783666564529.165.

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Conference papers on the topic "Iwand"

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Segalman, Daniel J., and Michael J. Starr. "Iwan Models and Their Provenance." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-71534.

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Iwan models have had some exposure recently in modeling the nonlinear response of individual joints. This popularity can be ascribed to their mathematical simplicity, their versatility, and their ability to capture the important responses of mechanical joints under unidirectional loads. There is a lot of history to this category of model. Masing explored kinematic hardening of metals with a model consisting of ten Jenkins elements in series. Soon after, Prandtl explored the behavior of a continuous distribution of such elements. Ishlinskii explored the mathematical structure of such continuous distributions. Much more recently, Iwan demonstrated practical application of such models in capturing various sorts of metal plasticity. Among the features that make such models interesting is a simple relationship between the asymptotic nature of the integral kernel at small values and the power-law relation between force amplitude and dissipation per cycle in harmonic loading. Iwan provided several differential equations for deducing the kernel from force-displacement relations. Segalman and Starr devised methods for deducing kernels from force-displacement curves of arbitrary Masing models. This is illustrated to generate a BPII model equivalent to the Ramberg-Osgood plasticity model. The Segalman-Starr relationship is used to find relationships among several other plasticity models.
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Dawson, Ethan, Wolfgang Roth, and Bei Su. "3-D Masing Behavior of a Parallel Iwan Model." In Second International Conference on Geotechnical and Earthquake Engineering. Reston, VA: American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784413128.065.

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Deshmukh, D. V., and E. J. Berger. "Shear Lag Based Iwan Model for Interface Friction Contacts." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-85328.

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Reduced order models for characterizing friction interfaces have been investigated for the last 75 years. Recent work has been focused on microslip formulation of the interface behavior, where continuous contact is approximated with a multi-point contact model. A novel multi-point contact model is presented in this work, which is entirely derived from a shear lag approach to resolve the kinematic state of the friction interface under the presence of tangential loading. Both static and dynamic loading conditions are analyzed and comparisons are drawn between the continuous and discrete models. The series Iwan model presented in this work differentiates between the elastic and friction components of the interface displacement, both parameters being calibrated using material properties and model geometry. Convergence behavior of such models with increasing model order is demonstrated. The response characteristics of the series Iwan model under dynamic loading conditions is also investigated. The series Iwan model is in good agreement with the shear lag approach for results such as propagation of the slip zone with increasing pullout force. The transient response of the the structural mass and the kinematic states of the damping elements are convergent with increasing model order.
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Mamun, K. A., A. Sharma, A. S. M. Hoque, and T. Szecsi. "Remote patient physical condition monitoring service module for iWARD hospital robots." In 2014 Asia-Pacific World Congress on Computer Science and Engineering (APWC on CSE). IEEE, 2014. http://dx.doi.org/10.1109/apwccse.2014.7053854.

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Dawson, Ethan M., and Wolfgang Roth. "Stress-Rotation Response of a Parallel Iwan Model for Sand." In International Conference on Geotechnical and Earthquake Engineering 2018. Reston, VA: American Society of Civil Engineers, 2019. http://dx.doi.org/10.1061/9780784482049.015.

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Song, Yaxin, D. Michael McFarland, L. A. Bergman, C. J. Hartwigsen, and Alexander F. Vakakis. "Modeling of the Dynamics of Jointed Beam Structures." In ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/vib-48434.

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Mechanical joints can have significant effects on the dynamics of assembled structures. The goal of our work is to develop physics based, reduced-order, finite element models that are capable of replicating the effects of joints on vibrating structures. Various studies have shown that micro and macro-slip along the joint interface cause the interface stiffness to change and introduce energy dissipation, leading to the observed hysteresis. The authors recently developed the so-called adjusted Iwan beam element (AIBE) for finite element analysis of jointed beam structures. The element consists of two adjusted Iwan models that are arranged to give two-dimensional beam behavior. The adjusted Iwan model is a combination of springs and frictional sliders that exhibits hysteretic behavior due to the stick-slip behavior of the sliders. In this paper, the sensitivity of the performance of an adjusted Iwan model, particularly its capacity to dissipate energy, to variations in its parameters is studied. Parametric analysis is also carried out on the adjusted Iwan beam element to investigate the effects of joint parameters on dynamic responses of jointed beams. Hammer tests are conducted on a jointed beam and its monolithic counterpart. The decay envelopes of impulsive responses for the two systems exhibit distinctly different dynamic properties. To verify that the adjusted Iwan beam element is capable of actually modeling the effects of joints on a vibrating structure, numerical simulations are performed of two hammer tests with different forcing levels. The joint parameters of the jointed beam are identified from the experimentally-obtained acceleration response from one hammer test by using a multi-layer feed-forward neural network (MLFF). Then, using the identified joint parameters, acceleration responses of the jointed beam in the other hammer test are predicted. The capability of the AIBE to capture the effects of bolted joints on the dynamic responses of beam structures is demonstrated through good agreement between simulated and experimental results.
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Ferri, Al, and Emad Shahid. "Simulation of Nonlinear Systems Having Series and Parallel Friction Elements." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48508.

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The numerical response of a SDOF oscillator with a friction element and spring in series is investigated. The connection between the friction element and the spring is massless resulting in an ideal “Iwan element,” also termed an elastic/perfectly-plastic element. A methodology is proposed that avoids the complications caused by hysteresis, allowing the system to be simulated using relatively simple programming logic. A notable feature of the technique is that it yields a functional relation for the friction force that depends on the present value of the state vector, rather than on prior history of the motion. The method introduces a small, “fictitious” slider mass within the Iwan element. Simulations are presented to show how the relative size of the slider mass affects the trade off between accuracy and computational costs. It is seen that the results of the method are very accurate and easy to implement. It is also shown that the added numerical stiffness associated with the high-frequency dynamics of the slider mass can be alleviated through use of a switchable viscous damping term. The viscous damping term decreases the number of timesteps required for simulation without adversely affecting the accuracy. The paper considers SDOF systems having a single Iwan-element as well as multiple Iwan elements.
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Miller, Jason D., and D. Dane Quinn. "An Iwan Model for Dissipation in Structural Systems With Frictional Joints." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84985.

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Modeling mechanical joints in an accurate and efficient manner is of great importance in the analysis of large structural systems, which can be composed of a large number of connected components. This work presents an interface model that can be decomposed into a series-series Iwan model together with an elastic chain, subject to interfacial shear loads. The model is developed and results are presented as the interface is subject to harmonic loading of varying amplitude. The model presented is able to qualitatively reproduce experimentally observed dissipation scalings. Finally, the interface model is embedded within a larger structural system to illustrate its effectiveness in capturing the structural damping induced by mechanical joints.
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Royston, Thomas. "Leveraging the Equivalence of Hysteresis Models From Different Fields for Analysis and Numerical Simulation of Jointed Structures." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34212.

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An important problem that spans across many types of systems (e.g. mechanical and biological) is how to model the dynamics of joints or interfaces in built-up structures in such a way that the complex dynamic and energy dissipative behavior that depends on micro-scale phenomena at the joint/interface is accurately captured, yet in a framework that is amenable to efficient computational analyses of the larger macro-scale system of which the joint or interface is a (spatially) small part. Simulating joint behavior in finite element analysis by meshing the joint regions finely enough to capture relevant micromechanics is impractical for large-scale structural systems due to the prohibitively small time steps required and/or resulting matrix ill-conditioning. A more practical approach is to devise constitutive models for the overall behavior of individual joints that accurately capture their nonlinear and energy-dissipative behavior and to incorporate the constitutive response locally into the otherwise often-linear structural model. Recent studies have successfully captured and simulated mechanical joint dynamics using computationally simple phenomenological models of combined elasticity and slip with associated friction and energy dissipation, known as Iwan models. In the present article, the author reviews the relationship, and in some cases exact equivalence, of one type of Iwan model to several other models of hysteretic behavior that have been used to simulate a wide range of physical phenomena. Specifically, it is shown that the “parallel-series” Iwan model has been referred to in other fields by different names, including “Maxwell Resistive-Capacitor” and “Ishlinskii”. Given this, the author establishes the relationship of this Iwan model to several other hysteresis models, most significantly the classical Preisach model. Having established these relationships, it is then possible to extend analytical tools developed for a specific hysteresis model to all of the models with which it is related. Such analytical tools include experimental identification, inversion and analysis of vibratory energy flow and dissipation. A numerical case study of a simple system that includes an Iwan-modeled joint illustrates these points.
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Roettgen, Daniel R., Matthew S. Allen, Dan Osgood, and Stuart Gerger. "Feasibility of Describing Joint Nonlinearity in Exhaust Components With Modal Iwan Models." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-35359.

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Segalman recently proposed a model for joint nonlinearity in a built up structure in which each mode is treated independently (orthogonality is assumed to be preserved) and with an Iwan model added to each modal degree of freedom to capture the nonlinearity of all of the joints that are active in that mode. Recent works have shown that this type of model can faithfully describe the nonlinearity in simple laboratory structures and in simulations of structures with several Iwan joints in the micro-slip regime. This work explores the validity of these concepts for more complicated structures, each of which is part of a production automotive exhaust system. Where possible, factory gaskets were used and the bolted joints were tightened per the manufacturer’s specifications. Tests were performed on different subassemblies of the exhaust using a modal hammer to excite the structure and accelerometers to measure its response. Mayes & Allen’s ZEFFT algorithm was used to determine which modes were behaving nonlinearly. Then an algorithm based on the Hilbert transform was used to extract the instantaneous frequency and damping for the modes of interest and to fit the behavior to a modal Iwan model. The results show several modes that exhibit small frequency shifts and damping that changes by as much as a factor of two over the range of forces that were employed.
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Reports on the topic "Iwand"

1

SEGALMAN, DANIEL J. A Four-Parameter Iwan Model for Lap-Type Joints. Office of Scientific and Technical Information (OSTI), November 2002. http://dx.doi.org/10.2172/805877.

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2

SEGALMAN, DANIEL J. An Initial Overview of Iwan Modeling for Mechanical Joints. Office of Scientific and Technical Information (OSTI), March 2001. http://dx.doi.org/10.2172/780307.

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