Accession Number : ADA602585


Title :   Initial Parameter Estimation for Inverse Thermal Analysis of Ti-6Al-4V Deep Penetration Welds


Descriptive Note : Memorandum rept. 1 Oct 2013-1 Mar 2014


Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC


Personal Author(s) : Lambraskos, Samuel G ; Huang, LuLu ; Shabaev, A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a602585.pdf


Report Date : 16 May 2014


Pagination or Media Count : 39


Abstract : Case study inverse thermal analyses of Ti-6Al-4V deep penetration welds are presented. These analyses employ a methodology that is in terms of analytical basis functions for inverse thermal analysis of steady state energy deposition in plate structures. The results of the case studies provide parametric representations of weld temperature histories that can be adopted as input data to various types of computational procedures, such as those for prediction of solid-state phase transformations. In addition, these temperature histories can be used to construct parametric-function representations for inverse thermal analysis of welds corresponding to other process parameters or welding processes whose process conditions are within similar regimes. This study also discusses specific aspects of the inverse-analysis methodology relevant to further development of algorithms for its application in practice.


Descriptors :   *THERMAL ANALYSIS , *WELDS , ALGORITHMS , CASE STUDIES , DEEP DEPTH , METHODOLOGY , PENETRATION , PHASE TRANSFORMATIONS , STEADY STATE , TEMPERATURE


Subject Categories : Couplers, Fasteners, and Joints
      Thermodynamics


Distribution Statement : APPROVED FOR PUBLIC RELEASE