---
title: "Did the Sulsky–Chen–Schreyer Material Point Method collaboration actually start in 1993, or does it trace back to an earlier Sandia report (SAND91-7095)?"
type: "question"
status: "answered"
date_raised: "2026-08-21T00:00:00.000Z"
answered_log: "2026-08-22 — answered by [[claim-sand91-7095-predates-1993-mpm-founding-report]], [[claim-sand91-7095-abstract-describes-same-mpm-mechanism]], and [[claim-schreyer-bibliography-confirms-1992-asme-publication]]. What settled it: OSTI.GOV's own catalog carries a distinct, earlier Sandia report (SAND-91-7095, catalog year 1992) by the same three authors, describing the same core mechanism, and Howard Schreyer's own faculty bibliography independently confirms it reached ASME conference publication that same year — so the collaboration's Sandia-funded work on this problem predates '1993' by at least a year. A narrower residual (exact 1991-vs-1992 date, mechanism check against full text rather than abstract) is still open at [[question-sand91-7095-full-text-needed]]."
tags: ["material-point-method","sandia","primary-source-verification","history-of-computing"]
---


Raised while promoting the capture that verified
[[claim-material-point-method-1993-sandia-funded-penetration-mechanics]] against the
1994 CMAME primary paper and the 1993 Sandia technical report SAND93-7044. That check
confirmed the funding ([[claim-mpm-1994-paper-acknowledges-sandia-and-nsf-cofunding]])
and motivation ([[claim-mpm-founding-papers-motivated-by-broad-problem-class]]) legs of
the origin story, but could not confirm or rule out that the underlying collaboration
predates "1993" — the year carried in the existing claim-note's title.

**What's known:** SAND93-7044 is dated "Printed June 1993," and the CMAME paper was
"Received 10 June 1993" — both consistent with a 1993 start, but neither document states
when the research itself began, and producing a complete technical report by June 1993
implies work was already well underway before that date.

**The specific lead:** a web search during the capture surfaced a citation (in secondary
summaries, not read directly) to an apparently earlier Sandia report by the same three
authors — "The application of a material-spatial numerical method to penetration," said
to be SAND91-7095, dated 1991 or 1992 depending on the source. If this report exists as
described, it would push the Sulsky/Chen/Schreyer penetration-focused collaboration under
Sandia back roughly two years earlier than "1993." It could not be located on OSTI's own
site search in the time available.

**What to verify:** search osti.gov's own search interface directly (not general web
search) for SAND91-7095 or "material-spatial numerical method... penetration" by
Sulsky/Chen/Schreyer; if found, read it directly for a date and compare its content
against SAND93-7044 to establish whether it's the same research program or a distinct
earlier effort.

**Why it matters.** The existing claim-note's title states MPM was developed "in 1993" —
a specific date claim resting on Tier 1 sources that don't actually state a start date.
Low-to-medium priority: it doesn't threaten the funding/motivation claims already
confirmed, but a kept claim-note is currently stating a year the primary sources only
loosely support.


## Progress log

- 2026-08-22 — answered by [[claim-sand91-7095-predates-1993-mpm-founding-report]], [[claim-sand91-7095-abstract-describes-same-mpm-mechanism]], and [[claim-schreyer-bibliography-confirms-1992-asme-publication]]. What settled it: OSTI.GOV's own catalog carries a distinct, earlier Sandia report (SAND-91-7095, catalog year 1992) by the same three authors, describing the same core mechanism, and Howard Schreyer's own faculty bibliography independently confirms it reached ASME conference publication that same year — so the collaboration's Sandia-funded work on this problem predates '1993' by at least a year. A narrower residual (exact 1991-vs-1992 date, mechanism check against full text rather than abstract) is still open at [[question-sand91-7095-full-text-needed]].