ASME RT-1-2015 pdf free

ASME RT-1-2015 pdf free.Structural Load Requirements for LRVs.
The limiting static material properties shall be as given in the referenced material standard. When other standards are used, equivalency shall be demonstrated between these standards and the referenced material standards.
Nonmetallic Materials
If nonmetallic materials arc utilized, then this Standard shall be applied to the extent possible. Data from internationally accepted standards that represent the performance of the material rn.w be applied pending demonstration of equivalency to a U.S. cnde or standard.
CRASH ENERGY MANAGEMENT (CEM)
To improve crashworthiness, this Standard requires that the principles of crash energy management (CEM) be applied, including the use of analytical tools and/or testing to verify that the carbody design is stable and cruches as intended. Analysis for the purpose of evaluation of load cases specified in para. 4,6 and Tables 3 and 4 shall be of the time-dependent, large-deflection type. Validation of the crush behavior by test shall be performed only if specified.
The carbody shall be designed to crush and absorb energy in a controlled manner when subjected to end loads that exceed its static load capability. The design shall be based on the CEM structural energy absorption zones per the scenarios specified in Table 3 or Table 4. A CEM and collision survivability strategy shall be developed that is compliant with the Criteria provided in section 4. The strategy shall define the specific features of the carbody that will provide the required zones of energy absorption.
Structural analysis of the carbody and of supports for equipment weighing over 11.3 kg (25 Ib) shall be performed. For any portion of the proposed design that is based on service-proven vehicle data from previous tests, historical data from operations or structural analyses as required to satisfy the corresponding portion of these requirements shall be provided.
A structural sketch shall be provided in order to clearly define the primary carbody structure. The structural sketch shall include a side view, a top view showing one longitudinal half of the roof and one longitudinal half of the underframe, and typical carbody Cross sections. Cross sections of the structural members, showing the shape, dimensions, material, and thickness of each member, shall be included. The members and the connections shown shall include, to the extent used in the particular design, the typical side frame and door frame posts; end, side, draft, and center sills; belt, top, and roof rails; collision and corner posts; bolsters, floor beams, and cross bearers; roof canines and purlins; roof sheathing or corrugation; and side-frame sheathing and/or corrugation.
LInear-Elastic Stress Analysis
The carbody stress analysis shall consist of a linear- elastic finite element analysis (FEA) based upon the structural sketch and using a recognized computer FEA code, supplemented as appropriate by analytical (noncomputational) stress analyses.
The results of the linear stress analysis shall include calculated stresses, allowable stresses, and margins of safety for all structural elements at all design loading conditions required by this Standard. For all linear- elastic load cases, the elastic stability of plates, webs, and flanges shall be calculated for members subject to compression and shear.ASME RT-1 pdf free download.